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Hydrophobic fluorinated polyelectrolyte complex films and associated methods
Title
Hydrophobic fluorinated polyelectrolyte complex films and associated methods.
Creator
Schlenoff, Joseph B.
Abstract/Description
A fuel cell comprising a proton transporting membrane is provided. The proton transporting membrane comprises a polyelectrolyte film comprising a multilayer comprising an interpenetrating network of a net positively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms and a net negatively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms, and further comprising a fluorinated counterion within the multilayer.
Date Issued
2011-12-06
Identifier
FSU_uspto_8071255, 8071255, 915739, 12/727930, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Hydrophobic fluorinated polyelectrolyte complex films and associated methods
Title
Hydrophobic fluorinated polyelectrolyte complex films and associated methods.
Creator
Schlenoff, Joseph B.
Abstract/Description
A polyelectrolyte film is provided, the polyelectrolyte film comprises an interpenetrating network of a net positively charged polymer and a net negatively charged polymer, wherein the net positively charged polymer, the net negatively charged polymer, or both contain polymer repeat units with at least two fluorine atoms.
Date Issued
2010-05-11
Identifier
FSU_uspto_7713629, 7713629, 915739, 10/594185, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Low self-absorbing, intrinsically scintillating polymers
Title
Low self-absorbing, intrinsically scintillating polymers.
Creator
Schlenoff, Joseph B., Dharia, Jayesh, Johnson, Kurtis F.
Abstract/Description
Polymers containing covalently-bonded, low self-absorbing, scintillating chromophores, polymerizable chromophores of the formula: ##STR1## wherein R.sub.1 is vinyl, .alpha.-methyl vinyl, vinyl phenyl, or vinyl benzyl, and R.sub.2 and R.sub.3 are independently hydrogen, alkyl, aryl, cyano, nitro, halo, or ether, and a process for the preparation of polymers containing low self-absorbing, scintillating chromophores.
Date Issued
1993-11-02
Identifier
FSU_uspto_5258478, 5258478, 915739, 07/874748, 600b83161da1122888348587dc18798c
Format
Citation
Method of preparing free polyelectrolyte membranes
Title
Method of preparing free polyelectrolyte membranes.
Creator
Schlenoff, Joseph B., Dubas, Stephen T.
Abstract/Description
A releaseable membrane structure for producing a free membrane containing a substrate, a release stratum on the substrate and a membrane stratum on the release stratum. The release stratum and the membrane stratum contain oppositely-charged polyelectrolytes that are associated. The oppositely-charged polyelectrolytes of the release stratum are selected to dissociate upon application of stimulus whereas those of the membrane stratum are selected to remain associated upon application of the...
Show moreA releaseable membrane structure for producing a free membrane containing a substrate, a release stratum on the substrate and a membrane stratum on the release stratum. The release stratum and the membrane stratum contain oppositely-charged polyelectrolytes that are associated. The oppositely-charged polyelectrolytes of the release stratum are selected to dissociate upon application of stimulus whereas those of the membrane stratum are selected to remain associated upon application of the stimulus. Thus, when the stimulus is applied the polyelectrolytes in release stratum dissociate and the membrane stratum is released from the substrate and is a free membrane.
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Date Issued
2007-05-29
Identifier
FSU_uspto_7223327, 7223327, 915739, 10/475236, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Ordered array of magnetized nanorods and associated methods
Title
Ordered array of magnetized nanorods and associated methods.
Creator
Schlenoff, Joseph B.
Abstract/Description
An ordered array of magnetized nanorods includes a plurality of metallic nanorods generally cylindrical in shape and including a nickel portion coated with a positively charged polyelectrolyte and a gold portion coated with an alkanethiolate; and a layer of a hardened polymer wherein each individual nanorod of the plurality is held by having said gold portion embedded therein so that the nickel portion extends approximately perpendicularly away from the layer of hardened polymer, and wherein...
Show moreAn ordered array of magnetized nanorods includes a plurality of metallic nanorods generally cylindrical in shape and including a nickel portion coated with a positively charged polyelectrolyte and a gold portion coated with an alkanethiolate; and a layer of a hardened polymer wherein each individual nanorod of the plurality is held by having said gold portion embedded therein so that the nickel portion extends approximately perpendicularly away from the layer of hardened polymer, and wherein said plurality of metallic nanorods is ordered in the array by having substantially all individual nanorods of the plurality of nanorods oriented generally parallel to each other.
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Date Issued
2006-09-12
Identifier
FSU_uspto_7105052, 7105052, 915739, 10/799182, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Polyelectrolyte complex films for analytical and membrane separation of chiral compounds
Title
Polyelectrolyte complex films for analytical and membrane separation of chiral compounds.
Creator
Schlenoff, Joseph B., Rmaile, Hassan
Abstract/Description
The present invention is directed to enantioselective polyelectrolyte complex films. Further, said films may be free or isolated membranes, or coatings on substrates such a porous substrates, capillary tubes, chromatographic packing material, and monolithic stationary phases and used to separate chiral compounds. The present invention is also directed to a method for forming such enantioselective polyelectrolyte complex films.
Date Issued
2006-09-05
Identifier
FSU_uspto_7101947, 7101947, 915739, 10/462164, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Apparatus for capillary electrophoresis and associated method
Title
Apparatus for capillary electrophoresis and associated method.
Creator
Schlenoff, Joseph B., Graul, Timothy W.
Abstract/Description
An apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of...
Show moreAn apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of polyelectrolyte layers. An apparatus includes a power supply having a positive electrode and a negative electrode for generating an electric field therebetween. The apparatus includes a capillary having a passage formed by passage walls and comprising therein a polyelectrolyte multilayer positioned substantially within the passage. The passage has a first end electrically connected to the positive electrode and a second end electrically connected to the negative electrode to thereby generate an electric field through the passage. The apparatus also includes a sensor positioned adjacent the passage for sensing macromolecules.
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Date Issued
2007-10-23
Identifier
FSU_uspto_7285421, 7285421, 915739, 10/933179, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Apparatus for capillary electrophoresis comprising polyelectrolyte multilayers
Title
Apparatus for capillary electrophoresis comprising polyelectrolyte multilayers.
Creator
Schlenoff, Joseph B., Graul, Timothy W.
Abstract/Description
An apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of...
Show moreAn apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of polyelectrolyte layers. An apparatus includes a power supply having a positive electrode and a negative electrode for generating an electric field therebetween. The apparatus includes a capillary having a passage formed by passage walls and comprising therein a polyelectrolyte multilayer positioned substantially within the passage. The passage has a first end electrically connected to the positive electrode and a second end electrically connected to the negative electrode to thereby generate an electric field through the passage. The apparatus also includes a sensor positioned adjacent the passage for sensing macromolecules.
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Date Issued
2009-09-29
Identifier
FSU_uspto_7594986, 7594986, 915739, 11/874259, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Apparatus for capillary electrophoresis and associated method
Title
Apparatus for capillary electrophoresis and associated method.
Creator
Schlenoff, Joseph B., Graul, Timothy W.
Abstract/Description
An apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of...
Show moreAn apparatus and method for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica. The polyelectrolyte multilayer is positioned within the passage adjacent the walls, and comprises an organic polyelectrolyte. The passage may further comprise nonporous silica particles coated with a multilayer including a plurality of polyelectrolyte layers. An apparatus includes a power supply having a positive electrode and a negative electrode for generating an electric field therebetween. The apparatus includes a capillary having a passage formed by passage walls and comprising therein a polyelectrolyte multilayer positioned substantially within the passage. The passage has a first end electrically connected to the positive electrode and a second end electrically connected to the negative electrode to thereby generate an electric field through the passage. The apparatus also includes a sensor positioned adjacent the passage for sensing macromolecules.
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Date Issued
2005-01-11
Identifier
FSU_uspto_6841054, 6841054, 915739, 10/145161, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Biocompatible polyelectrolyte complexes and methods of use
Title
Biocompatible polyelectrolyte complexes and methods of use.
Creator
Schlenoff, Joseph B.
Abstract/Description
An article comprising a polyelectrolyte complex comprising an interpenetrating network of at least one predominantly positively charged polyelectrolyte polymer and at least one predominantly negatively charged polyelectrolyte polymer, the polyelectrolyte complex further comprising a plurality of closed-shell pores, the plurality of pores having at least one average transverse dimension between about 100 nanometer and about 1000 micrometers.
Date Issued
2016-05-31
Identifier
FSU_uspto_9352068, 9352068, 915739, 14/602628, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Biocompatible polyelectrolyte complexes and methods of use
Title
Biocompatible polyelectrolyte complexes and methods of use.
Creator
Schlenoff, Joseph B.
Abstract/Description
An article comprising a polyelectrolyte complex comprising an interpenetrating network of at least one predominantly positively charged polyelectrolyte polymer and at least one predominantly negatively charged polyelectrolyte polymer, the polyelectrolyte complex further comprising a plurality of closed-shell pores, the plurality of pores having at least one average transverse dimension between about 100 nanometer and about 1000 micrometers.
Date Issued
2015-04-14
Identifier
FSU_uspto_9005662, 9005662, 915739, 13/391312, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Apparatus for capillary electrophoresis with polyelectrolyte multilayer coating on the capillary walls
Title
Apparatus for capillary electrophoresis with polyelectrolyte multilayer coating on the capillary walls.
Creator
Schlenoff, Joseph B., Graul, Timothy W.
Abstract/Description
An apparatus for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica and the polyelectrolyte multilayer positioned within the passage. The polyelectrolyte multilayer comprises layers with alternating charge. The apparatus includes a power supply having a positive electrode and a negative electrode for generating an...
Show moreAn apparatus for capillary zone electrophoresis includes a polyelectrolyte multilayer positioned in a capillary tube for analytical separations of macromolecules. The capillary comprises a passage defined by passage walls comprising fused silica and the polyelectrolyte multilayer positioned within the passage. The polyelectrolyte multilayer comprises layers with alternating charge. The apparatus includes a power supply having a positive electrode and a negative electrode for generating an electric field therebetween and a sensor positioned adjacent the passage for sensing macromolecules.
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Date Issued
2014-04-01
Identifier
FSU_uspto_8685219, 8685219, 915739, 11/874233, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Films for controlled cell growth and adhesion
Title
Films for controlled cell growth and adhesion.
Creator
Schlenoff, Joseph B., Salloum, David S., Keller, III, Thomas C., Olenych, Scott G.
Abstract/Description
An article for controlling the attachment and growth of cells on a surface of the article, and a method for the use of the article is provided. The article comprises a substratum having a surface and a film on the surface, the film comprising a network of a net positively charged composition and a net negatively charged composition, wherein the net positively charged composition comprises a net positively charged polyelectrolyte or the net negatively charged composition comprises a net...
Show moreAn article for controlling the attachment and growth of cells on a surface of the article, and a method for the use of the article is provided. The article comprises a substratum having a surface and a film on the surface, the film comprising a network of a net positively charged composition and a net negatively charged composition, wherein the net positively charged composition comprises a net positively charged polyelectrolyte or the net negatively charged composition comprises a net negatively charged polyelectrolyte, and the net positively charged polyelectrolyte or the net negatively charged polyelectrolyte contain (i) a polymer repeat unit having at least two fluorine atoms, or (ii) a polymer repeat unit having a zwitterion group. The method comprises contacting the article with living tissue, living organisms, or with water in an aqueous system comprising living organisms.
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Date Issued
2015-06-16
Identifier
FSU_uspto_9056125, 9056125, 915739, 11/130972, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Polymer mechanical damping composites and methods of production
Title
Polymer mechanical damping composites and methods of production.
Creator
Schlenoff, Joseph B.
Abstract/Description
An article comprising a polyelectrolyte complex, the polyelectrolyte complex comprising an intermolecular blend of a predominantly positively-charged polyelectrolyte and a predominantly negatively charged polyelectrolyte and being free of salt crystals having a size greater than about 1 micrometer and free of voids having a size greater than about 100 nm, the article having no transverse dimension less than about 10,000 nm.
Date Issued
2012-06-26
Identifier
FSU_uspto_8206816, 8206816, 915739, 12/439647, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Polymer mechanical damping composites and methods of production
Title
Polymer mechanical damping composites and methods of production.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method of reshaping an article comprising a polyelectrolyte complex, the polyelectrolyte complex comprising an intermolecular blend of a predominantly positively-charged polyelectrolyte and a predominantly negatively charged polyelectrolyte by controlling the salt doping level.
Date Issued
2012-06-26
Identifier
FSU_uspto_8206822, 8206822, 915739, 12/399690, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Proton-transfer, low self-absorbing chromophores for use in scintillators
Title
Proton-transfer, low self-absorbing chromophores for use in scintillators.
Creator
Schlenoff, Joseph B., Gao, Feng (Frank), Dharia, Jayesh, Johnson, Kurtis F.
Abstract/Description
Proton-transfer, low self-absorbing chromophores of the formula: ##STR1## wherein R.sub.2 and R.sub.3 are independently hydrogen, alkyl, aryl, cyano, nitro, halo or an ether group, R.sub.4 is O or N--H, and R.sub.5 is thienyl, naphthyl, furanyl, pyrrolyl, phenyl vinyl, diphenyl vinyl, phenyl ethynyl, hydroxy chromonyl phenyl, didecyloxy hydroxy chromonyl phenyl, phenyl or ##STR2## wherein R.sub.1 is vinyl, vinyl phenyl, vinyl benzyl, alkyl ethenyl, or alkyl phenyl ethenyl, provided that when...
Show moreProton-transfer, low self-absorbing chromophores of the formula: ##STR1## wherein R.sub.2 and R.sub.3 are independently hydrogen, alkyl, aryl, cyano, nitro, halo or an ether group, R.sub.4 is O or N--H, and R.sub.5 is thienyl, naphthyl, furanyl, pyrrolyl, phenyl vinyl, diphenyl vinyl, phenyl ethynyl, hydroxy chromonyl phenyl, didecyloxy hydroxy chromonyl phenyl, phenyl or ##STR2## wherein R.sub.1 is vinyl, vinyl phenyl, vinyl benzyl, alkyl ethenyl, or alkyl phenyl ethenyl, provided that when R.sub.5 is phenyl and R.sub.2 and R.sub.3 are hydrogen, R.sub.4 is N--H.
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Date Issued
1996-09-03
Identifier
FSU_uspto_5552551, 5552551, 915739, 08/096956, 600b83161da1122888348587dc18798c
Format
Citation
Polyelectrolyte complex films for analytical and membrane separation of chiral compounds
Title
Polyelectrolyte complex films for analytical and membrane separation of chiral compounds.
Creator
Schlenoff, Joseph B., Rmaile, Hassan
Abstract/Description
The present invention is directed to enantioselective polyelectrolyte complex films. Further, said films may be free or isolated membranes, or coatings on substrates such a porous substrates, capillary tubes, chromatographic packing material, and monolithic stationary phases and used to separate chiral compounds. The present invention is also directed to a method for forming such enantioselective polyelectrolyte complex films.
Date Issued
2008-04-29
Identifier
FSU_uspto_7365142, 7365142, 915739, 11/500085, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Polymer mechanical damping composites and methods of production
Title
Polymer mechanical damping composites and methods of production.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method of reshaping an article comprising a polyelectrolyte complex, the polyelectrolyte complex comprising an intermolecular blend of a predominantly positively-charged polyelectrolyte and a predominantly negatively charged polyelectrolyte by controlling the salt doping level.
Date Issued
2013-02-12
Identifier
FSU_uspto_8372891, 8372891, 915739, 13/606122, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Polymer mechanical damping composites and methods of production
Title
Polymer mechanical damping composites and methods of production.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method of reshaping an article comprising a polyelectrolyte complex, the polyelectrolyte complex comprising an intermolecular blend of a predominantly positively-charged polyelectrolyte and a predominantly negatively charged polyelectrolyte by controlling the salt doping level.
Date Issued
2012-10-09
Identifier
FSU_uspto_8283030, 8283030, 915739, 13/482064, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Specimen holder
Title
Specimen holder.
Creator
Rink, William J., Schlenoff, Joseph B., Mathias, Haim H.
Abstract/Description
A specimen holder including a housing having a specimen chamber in it. A window defining a wall of the chamber allows transmission of at least a portion of the x-radiation from X-ray diffraction spectometry apparatus on which the holder is mounted, into the chamber. The housing has a passageway in it opening at one end into the specimen chamber and at the opposite end to outside the housing. A cylindrical specimen mount supports the specimen in the housing is constructed for sealing sliding...
Show moreA specimen holder including a housing having a specimen chamber in it. A window defining a wall of the chamber allows transmission of at least a portion of the x-radiation from X-ray diffraction spectometry apparatus on which the holder is mounted, into the chamber. The housing has a passageway in it opening at one end into the specimen chamber and at the opposite end to outside the housing. A cylindrical specimen mount supports the specimen in the housing is constructed for sealing sliding reception in the passageway such that the specimen mount is rotatable about its longitudinal axis and movable lengthwise of the passageway while maintaining a seal with the passageway for positioning the specimen in the specimen chamber.
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Date Issued
1993-01-19
Identifier
FSU_uspto_5181233, 5181233, 915738, 07/790203, 600b83161da1122888348587dc18798c
Format
Citation
Stable iron oxide nanoparticles and method of production
Title
Stable iron oxide nanoparticles and method of production.
Creator
Schlenoff, Joseph B., Estephan, Zaki G.
Abstract/Description
A method of preparing a dispersion of stabilized iron oxide nanoparticles that comprise cores and coatings on the cores, which comprise zwitterionic functional groups chemically bound to the cores, using a single solution that comprises dissolved iron ions and a zwitterion silane and/or a hydrolyzed product of the zwitterion silane.
Date Issued
2015-11-24
Identifier
FSU_uspto_9196405, 9196405, 915739, 13/856214, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Solid scintillators for detecting radioactive ions in solution
Title
Solid scintillators for detecting radioactive ions in solution.
Creator
Schlenoff, Joseph B.
Abstract/Description
A scintillator for absorbing and concentrating radioactive ions within a solution, the scintillator including a solid scintillator and an ionic layer on a surface of and in contact with the solid scintillator. When radioactive ions are absorbed by the ionic layer, the scintillator acts as a light source.
Date Issued
1995-11-14
Identifier
FSU_uspto_5466930, 5466930, 915739, 08/200213, 600b83161da1122888348587dc18798c
Format
Citation
Variable charge films for controlling microfluidic flow
Title
Variable charge films for controlling microfluidic flow.
Creator
Schlenoff, Joseph B., Sui, Zhijie
Abstract/Description
A microfluidic device for carrying a liquid, the device comprising a microfluidic channel having an interior wall and a polyelectrolyte film on the interior wall whereby liquid carried by the channel contacts the polyelectrolyte film, the polyelectrolyte film having a thickness of about 1 to about 1000 nanometers and comprising an interpenetrating network of a predominantly positively charged polymer and a predominantly negatively charged polymer, the predominantly positively charged polymer,...
Show moreA microfluidic device for carrying a liquid, the device comprising a microfluidic channel having an interior wall and a polyelectrolyte film on the interior wall whereby liquid carried by the channel contacts the polyelectrolyte film, the polyelectrolyte film having a thickness of about 1 to about 1000 nanometers and comprising an interpenetrating network of a predominantly positively charged polymer and a predominantly negatively charged polymer, the predominantly positively charged polymer, the predominantly negatively charged polymer or both containing (i) a pH insensitive positively or negatively charged repeat unit having a pKa greater than 9 or less than 3, and (ii) a pH sensitive repeat unit, the pH sensitive repeat unit having a pKa of 3 to 9, whereby the pH of liquid in the microfluidic channel may be used to control the velocity or direction of electroosmotic flow of the liquid within said microfluidic channel.
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Date Issued
2010-05-25
Identifier
FSU_uspto_7722752, 7722752, 915739, 11/070770, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Thin films for controlled protein interaction
Title
Thin films for controlled protein interaction.
Creator
Schlenoff, Joseph B., Rmaile, Hassan, Salloum, David S., Sui, Zhijie
Abstract/Description
A medium for isolating or releasing an electrostatically charged component from or into an aqueous composition. The medium has a polyelectrolyte film on at least one surface of an article wherein the polyelectrolyte film is characterized by an interpenetrating network of a predominantly positively charged polymer and a predominantly negatively charged polymer. The predominantly positively charged polymer, the predominantly negatively charged polymer or both contain (i) a pH sensitive...
Show moreA medium for isolating or releasing an electrostatically charged component from or into an aqueous composition. The medium has a polyelectrolyte film on at least one surface of an article wherein the polyelectrolyte film is characterized by an interpenetrating network of a predominantly positively charged polymer and a predominantly negatively charged polymer. The predominantly positively charged polymer, the predominantly negatively charged polymer or both contain (i) a pH sensitive imidazole repeat unit having a pKa between 3 and 9, or (ii) a redox sensitive repeat unit selected from the group consisting of quaternized bipyridine repeat units, coordinated metal repeat units, pyrrole repeat units, aniline repeat units, thiophene repeat units and combinations thereof having a redox potential between +1.2 volts and −1.2 volts versus a standard hydrogen electrode.
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Date Issued
2013-07-09
Identifier
FSU_uspto_8481017, 8481017, 915739, 11/063952, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Thin films for controlled cell growth
Title
Thin films for controlled cell growth.
Creator
Schlenoff, Joseph B., Salloum, David S., Keller, III, Thomas C., Olenych, Scott G.
Abstract/Description
A method for controlling the attachment and growth of cells on a surface of an article, the method comprising contacting the article with living tissue, living organisms, or with water in an aqueous system comprising living organisms wherein the article comprises a substratum having a surface and a film on the surface, the film comprising a network of a net positively charged composition and a net negatively charged composition, wherein the net positively charged composition comprises a net...
Show moreA method for controlling the attachment and growth of cells on a surface of an article, the method comprising contacting the article with living tissue, living organisms, or with water in an aqueous system comprising living organisms wherein the article comprises a substratum having a surface and a film on the surface, the film comprising a network of a net positively charged composition and a net negatively charged composition, wherein the net positively charged composition comprises a net positively charged polyelectrolyte or the net negatively charged composition comprises a net negatively charged polyelectrolyte, and the net positively charged polyelectrolyte or the net negatively charged polyelectrolyte contain (i) a polymer repeat unit having at least two fluorine atoms, or (ii) a polymer repeat unit having a zwitterion group.
Show less
Date Issued
2016-01-05
Identifier
FSU_uspto_9228169, 9228169, 915739, 14/741062, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Controlled transport through multiple reversible interaction point membranes
Title
Controlled transport through multiple reversible interaction point membranes.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method for causing a membrane to become permeable to a first chemical species, in which the membrane is contacted with a solution comprising a second chemical species. The membrane comprises a polyelectrolyte complex film comprising a positively-charged polyelectrolyte and a negatively-charged polyelectrolyte. The second chemical species selectively interacts with the membrane, and selective interaction of the second chemical species with the membrane causes the membrane to become permeable...
Show moreA method for causing a membrane to become permeable to a first chemical species, in which the membrane is contacted with a solution comprising a second chemical species. The membrane comprises a polyelectrolyte complex film comprising a positively-charged polyelectrolyte and a negatively-charged polyelectrolyte. The second chemical species selectively interacts with the membrane, and selective interaction of the second chemical species with the membrane causes the membrane to become permeable to the first chemical species, thereby causing the first chemical species to permeate the membrane.
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Date Issued
2009-12-08
Identifier
FSU_uspto_7629133, 7629133, 915739, 11/764350, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Controlled transport through multiple reversible interaction point membranes
Title
Controlled transport through multiple reversible interaction point membranes.
Creator
Schlenoff, Joseph B.
Abstract/Description
A membrane comprising two or more macromolecules that interact via multiple reversible physical interaction points (MRIPM). The membrane further comprises a chemical species A, which interacts selectively or nonselectively with the MRIPM; and a chemical species B, which interacts selectively with the MRIPM whereby the passage of species A across the MRIPM is moderated by species B.
Date Issued
2007-07-03
Identifier
FSU_uspto_7238536, 7238536, 915739, 11/085926, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Compacted polyelectrolyte complexes and articles
Title
Compacted polyelectrolyte complexes and articles.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method is described for producing an osmotically compacted polyelectrolyte complex having a first region and a second region, the first region having a greater modulus than the second region. The method comprises contacting an article comprising polyelectrolyte complex to a solution comprising a preferred osmolyte of concentration sufficient to compact said polyelectrolyte complex and terminating the compaction process before the entire article is osmotically compacted.
Date Issued
2012-02-14
Identifier
FSU_uspto_8114918, 8114918, 915739, 12/542260, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Compacted polyelectrolyte complexes and articles
Title
Compacted polyelectrolyte complexes and articles.
Creator
Schlenoff, Joseph B.
Abstract/Description
A method is described for producing an osmotically compacted polyelectrolyte complex having a first region and a second region, the first region having a greater modulus than the second region. The method comprises contacting an article comprising polyelectrolyte complex to a solution comprising a preferred osmolyte of concentration sufficient to compact said polyelectrolyte complex and terminating the compaction process before the entire article is osmotically compacted.
Date Issued
2012-07-17
Identifier
FSU_uspto_8222306, 8222306, 915739, 13/346287, 600b83161da1122888348587dc18798c
Format
Citation
Compacted polyelectrolyte complexes and articles
Title
Compacted polyelectrolyte complexes and articles.
Creator
Schlenoff, Joseph B.
Abstract/Description
This invention relates to an osmotically compacted polyelectrolyte complex having a first region and a second region, the first region having a greater modulus than the second region and a method for preparing such an article. The article comprising the polyelectrolyte complex is produced by contacting a polyelectrolyte complex with a solution comprising an osmolyte at a concentration sufficient to compact the polyelectrolyte complex. The compaction process is terminated before the entire...
Show moreThis invention relates to an osmotically compacted polyelectrolyte complex having a first region and a second region, the first region having a greater modulus than the second region and a method for preparing such an article. The article comprising the polyelectrolyte complex is produced by contacting a polyelectrolyte complex with a solution comprising an osmolyte at a concentration sufficient to compact the polyelectrolyte complex. The compaction process is terminated before the entire article is osmotically compacted.
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Date Issued
2012-11-20
Identifier
FSU_uspto_8314158, 8314158, 915739, 13/346272, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Combined vertical and rotational motion indexing mechanism
Title
Combined vertical and rotational motion indexing mechanism.
Creator
Schlenoff, Joseph B., Dubas, Stephan T.
Abstract/Description
A mechanical indexing device. The device comprises a mechanism for converting linear motion into many different combinations of linear and rotary motion, whereby an object can be moved along a desired linear path and indexed through a desired arc of rotation.
Date Issued
2002-10-08
Identifier
FSU_uspto_6460424, 6460424, 915739, 09/818478, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Analytical separations with polyelectrolyte layers, molecular micelles, or zwitterionic polymers
Title
Analytical separations with polyelectrolyte layers, molecular micelles, or zwitterionic polymers.
Creator
Schlenoff, Joseph B., Warner, Isiah M., Kapnissi, Constantina P.
Abstract/Description
Polymeric surfactants (molecular micelles) are disclosed for use in open tubular capillary electrochromatography or in high performance liquid chromatography. For example, fused silica capillaries are coated with thin films of charged polymers in a polyelectrolyte multilayer (PEM). A PEM coating may be formed in situ by alternate rinses with positive and negative polyelectrolytes. At least the innermost of the negatively charged polymer layers is a molecular micelle. Prototype embodiments...
Show morePolymeric surfactants (molecular micelles) are disclosed for use in open tubular capillary electrochromatography or in high performance liquid chromatography. For example, fused silica capillaries are coated with thin films of charged polymers in a polyelectrolyte multilayer (PEM). A PEM coating may be formed in situ by alternate rinses with positive and negative polyelectrolytes. At least the innermost of the negatively charged polymer layers is a molecular micelle. Prototype embodiments have successfully separated seven benzodiazepines from one another. The run-to-run, day-to-day, week-to-week and capillary-to-capillary reproducibilities were very good, with relative standard deviation values less than 0.01. The PEM-coated capillary was very robust over at least 200 runs. Stability against high and low pH values was also observed. Using chiral polymerized micelles, chiral separations may be achieved, as was demonstrated with a separation of the enantiomers of 1,1′-binaphthyl-2,2′-dihydrogenphosphate. Alternatively, layers for use in this invention may be formed from zwitterionic polymers in lieu of separate cationic and anionic layers. Zwitterionic polymer layers may be used either with or without molecular micelles.
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Date Issued
2008-01-01
Identifier
FSU_uspto_7314550, 7314550, 915739, 10/283471, 600b83161da1122888348587dc18798c
Format
Citation
Brain implantable electrodes having an increased signal to noise ratio and method for making same
Title
Brain implantable electrodes having an increased signal to noise ratio and method for making same.
Creator
Schlenoff, Joseph B., Case, Gilbert
Abstract/Description
Herein disclosed are an electrode and a method for making an electrode having an enhanced electrically effective surface providing an increased signal to noise ratio. The electrode having a metal surface selected from gold, tungsten, stainless steel, platinum, platinum-tungsten, platinum-iridium, and combinations thereof; and an electrically conductive coating on said metal surface, said coating consisting essentially of polymerized pyrrole.
Date Issued
2012-04-10
Identifier
FSU_uspto_8155724, 8155724, 915739, 12/834094, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Brain implantable electrodes having an increased signal to noise ratio and method for making same
Title
Brain implantable electrodes having an increased signal to noise ratio and method for making same.
Creator
Schlenoff, Joseph B., Case, Gilbert
Abstract/Description
Herein disclosed are an electrode and a method for making an electrode having an enhanced electrically effective surface providing an increased signal to noise ratio. The electrode having a metal surface selected from gold, tungsten, stainless steel, platinum, platinum-tungsten, platinum-iridium, and combinations thereof; and an electrically conductive coating on said metal surface, said coating consisting essentially of polymerized pyrrole.
Date Issued
2010-07-13
Identifier
FSU_uspto_7754063, 7754063, 915739, 11/622553, 6c9256d97d167832cbab694dc904bd27
Format
Citation
Cell Adhesion and Proliferation on the “Living” Surface of a Polyelectrolyte Multilayer
Title
Cell Adhesion and Proliferation on the “Living” Surface of a Polyelectrolyte Multilayer.
Creator
Arias, Carlos B., Surmaitis, Richard L., Schlenoff, Joseph B.
Abstract/Description
The adhesion of living eukaryotic cells to a substrate, one of the most complex problems in surface science, requires adsorption of extracellular proteins such as fibronectin. Thin films of polyelectrolyte complex made layer-by-layer (polyelectrolyte multilayers or PEMUs) offer a high degree of control of surface charge and composition - interconnected and essential variables for protein adhesion. Fibroblasts grown on multilayers of poly(styrene sulfonate), PSS, and poly...
Show moreThe adhesion of living eukaryotic cells to a substrate, one of the most complex problems in surface science, requires adsorption of extracellular proteins such as fibronectin. Thin films of polyelectrolyte complex made layer-by-layer (polyelectrolyte multilayers or PEMUs) offer a high degree of control of surface charge and composition - interconnected and essential variables for protein adhesion. Fibroblasts grown on multilayers of poly(styrene sulfonate), PSS, and poly(diallyldimethylammonium), PDADMA, with increasing thickness exhibit good adhesion until the 12th layer of polyelectrolyte has been added, whereupon there is a sudden transition to nonadhesive behavior. This sharp change is due to the migration of excess positive charge to the surface – a previously unrecognized property of PEMUs. Precise radiotracer assays of adsorbed 125I-albumin, show how protein adsorption is related to multilayer surface charge. With more negative surface charge density from the sulfonates of PSS, more albumin adsorbs to the surface. However, a loosely-held or “soft corona” exchanges with serum protein under the Vroman effect, which is correlated with poor cell adhesion. A comprehensive view of cell adhesion highlights the central role of robust protein adhesion, which is required before any secondary effects of matrix stiffness on cell fate can come into play.
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Date Issued
2016-05-18
Identifier
FSU_libsubv1_scholarship_submission_1540238895_2ac07ed1, 10.1021/acs.langmuir.6b00784
Format
Citation
Water and the Glass Transition Temperature in a Polyelectrolyte Complex
Title
Water and the Glass Transition Temperature in a Polyelectrolyte Complex.
Creator
Fu, Jingcheng, Abbett, Rachel L., Fares, Hadi M., Schlenoff, Joseph B.
Abstract/Description
Hydrated polyelectrolyte complexes, H-PECs, have recently started attracting renewed interest as a class of highly solvated/plasticized blends. H-PECs are observed to undergo a transition in mechanical properties close to room temperature. Whether this is a true glass transition has been questioned recently: the material has an unusually low modulus in the “glassy” state and molecular dynamics simulations have suggested temperature-induced dehydration and water structure changes are...
Show moreHydrated polyelectrolyte complexes, H-PECs, have recently started attracting renewed interest as a class of highly solvated/plasticized blends. H-PECs are observed to undergo a transition in mechanical properties close to room temperature. Whether this is a true glass transition has been questioned recently: the material has an unusually low modulus in the “glassy” state and molecular dynamics simulations have suggested temperature-induced dehydration and water structure changes are responsible for the transition. Using in situ infrared spectroscopic methods on thin films of a widely-studied H-PEC we find no definitive evidence for changes in the hydration state of functional groups, the water content, or water structure below or above Tg for stoichiometric and nonstoichiometric H-PECs. These complexes represent a promising platform for fundamental studies of the glass transition, since the coupling between chains can be modified by “doping” the material with salt, which breaks ion pairing crosslinks. The Fox equation was used to estimate Tg’s for paired and unpaired oppositely-charged repeat units.
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Date Issued
2017-09-22
Identifier
FSU_libsubv1_scholarship_submission_1540241093_22e4df52, 10.1021/acsmacrolett.7b00668
Format
Citation
Towards Ion-Free Polyelectrolyte Multilayers
Title
Towards Ion-Free Polyelectrolyte Multilayers: Cyclic Salt Annealing.
Creator
Fares, Hadi M., Ghoussoub, Yara E., Surmaitis, Richard L., Schlenoff, Joseph B.
Abstract/Description
Polyelectrolyte multilayers (PEMUs) are made from various combinations of polyanions and polycations. It is now understood that these ultrathin films of polyelectrolyte complex may also incorporate counterions derived from the solution from which the PEMU was deposited, or exchanged into the film post-assembly. If these ions are required to compensate nonstoichiometric ratios of polycation and polyanion they cannot leave the film and they exert considerable influence on film properties, such...
Show morePolyelectrolyte multilayers (PEMUs) are made from various combinations of polyanions and polycations. It is now understood that these ultrathin films of polyelectrolyte complex may also incorporate counterions derived from the solution from which the PEMU was deposited, or exchanged into the film post-assembly. If these ions are required to compensate nonstoichiometric ratios of polycation and polyanion they cannot leave the film and they exert considerable influence on film properties, such as modulus and permeability. These “extrinsic” charges also complicate fundamental studies on PEMUs. We report a method to remove almost all ionic content from a PEMU made of poly(diallyldimethylammonium chloride), PDADMAC, and poly(styrene sulfonate), PSS. In this method, a high salt concentration plasticizes the multilayer past its glass transition, dispersing all the buried excess PDADMA throughout the film. Exposure to a solution of PSS in a lower salt concentration consumes excess PDADMA near the surface without overcompensating with PSS. The process is repeated in a cyclic fashion, removing >95% of the ions charge present in the as-made PEMU.
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Date Issued
2015-02-22
Identifier
FSU_libsubv1_scholarship_submission_1540241506_9d2111db, 10.1021/la504910y
Format
Citation
Ion Environments in Mn2+ -Doped Polyelectrolyte Complexes
Title
Ion Environments in Mn2+ -Doped Polyelectrolyte Complexes: Dilute Magnetic Saloplastics.
Creator
Abhyankar, Nandita, Ghoussoub, Yara E., Wang, Qifeng, Dalal, Naresh S., Schlenoff, Joseph B.
Abstract/Description
Amorphous hydrated complexes of the polyelectrolytes poly(styrene sulfonate) (PSS) and poly(diallyldimethylammonium) (PDADMA) were doped with the spin-5/2 ion Mn2+. Xband electron paramagnetic resonance (EPR) measurements of the Mn2+ spins within this stoichiometric polyelectrolyte complex (PEC) revealed an octahedral coordination environment, similar to that observed in aqueous solutions of Mn2+. This octahedral symmetry of the [Mn(H2O)6] 2+ complexes, observed in the fully hydrated PECs, is...
Show moreAmorphous hydrated complexes of the polyelectrolytes poly(styrene sulfonate) (PSS) and poly(diallyldimethylammonium) (PDADMA) were doped with the spin-5/2 ion Mn2+. Xband electron paramagnetic resonance (EPR) measurements of the Mn2+ spins within this stoichiometric polyelectrolyte complex (PEC) revealed an octahedral coordination environment, similar to that observed in aqueous solutions of Mn2+. This octahedral symmetry of the [Mn(H2O)6] 2+ complexes, observed in the fully hydrated PECs, is somewhat distorted due to the wide range of ion pairs possible with sulfonate groups on PSS. As the Mn2+ concentration was increased, the linewidths were broadened, indicating the dominance of dipolar broadening over exchange narrowing in determining the linewidths, i.e. any exchange narrowing was masked by the large dipolar broadening. The calculated linewidths were used to estimate the strength of the dipolar interactions, and hence the distances between the Mn2+ spins, based on a simple model of regularly spaced spins. The distances calculated by this method were roughly comparable to the geometric average distances calculated on the basis of the Mn2+ concentrations and densities of the doped PEC samples. From a comparison of their EPR spectra, ion environments in the doped, fully hydrated PECs were found to be similar to those in hydrated classical ion exchange resins. EPR spectra before and after drying of the PECs indicate the replacement of octahedrally coordinated water by oxide anions from the polyanion chain, and the corresponding loss of the symmetric environment of Mn2+ ions.
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Date Issued
2017-07-01
Identifier
FSU_libsubv1_scholarship_submission_1540239466_01912b85, 10.1021/acs.jpcb.6b02697
Format
Citation
Transport, magnetic, and optical properties of electrochemically doped poly(1, 4-dimethoxy phenylene vinylene)
Title
Transport, magnetic, and optical properties of electrochemically doped poly(1, 4-dimethoxy phenylene vinylene).
Creator
Schlenoff, Joseph B., Obrzut, Jan, Karasz, F.
Abstract/Description
A coordinated study on electrochemical, magnetic, optical, and transport properties of poly(1, 4- dimethoxy phenylene vinylene) (PDMPV) using in situ electrochemical doping techniques is presented. Properties are correlated through a common axis of applied voltage. Electrochemical doping shows approx. 100% Coulombic efficiency up to an applied potential of 3.8 V versus lithium in propylene carbonate electrolyte. Conductivity increases in a reversible manner to a maximum of 250 0 ' cm ' and an...
Show moreA coordinated study on electrochemical, magnetic, optical, and transport properties of poly(1, 4- dimethoxy phenylene vinylene) (PDMPV) using in situ electrochemical doping techniques is presented. Properties are correlated through a common axis of applied voltage. Electrochemical doping shows approx. 100% Coulombic efficiency up to an applied potential of 3.8 V versus lithium in propylene carbonate electrolyte. Conductivity increases in a reversible manner to a maximum of 250 0 ' cm ' and an applied potential of 3.9 V. Potentials in excess of 3.9 V cause an irreversible decrease in conductivity. Spin and charge show a 1:1 relation on/y to very low doping levels. Two paramagnetic species are produced on doping. A maximum spin concentration is observed at =3.7 V. The ultraviolet —visible —near-infrared spectra of doped PDMPV show at least five absorption bands, at 4.8, 3.7, 2.5, 1.7, and 0.6 eV. The first three bands decrease with doping and the latter two increase. When analyzed by the polaron or bipolaron model, the optical data imply significant symmetry breaking, Contributions to the optical activity from polarons and bipolarons are determined from the EPR results and are found to be di6'erent for both peaks, implying greater symmetrybreaking eA'ects for polarons. An electrochemical analysis of EPR results suggests that polaron interaction energies are =0.4S eV greater than those for bipolarons.
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Date Issued
1989
Identifier
FSU_migr_chm_faculty_publications-0006
Format
Citation
Correlation of Seebeck Coefficient and Electric Conductivity in Polyaniline and Polypyrrole
Title
Correlation of Seebeck Coefficient and Electric Conductivity in Polyaniline and Polypyrrole.
Creator
Mateeva, N., Niculescu, H., Schlenoff, Joseph B., Testardi, L.
Abstract/Description
We have measured the Seebeck coefficient and electric conductivity in the air-stable conducting polymers polyaniline and polypyrrole at different doping levels. We find, at 300 K, the general correlation that the logarithm of the electrical conductivity varies linearly with the Seebeck coefficient on doping, but with a proportionality substantially in excess of a prediction from simple theory for a single type of mobile carrier. The correlation is unexpected in its universality and...
Show moreWe have measured the Seebeck coefficient and electric conductivity in the air-stable conducting polymers polyaniline and polypyrrole at different doping levels. We find, at 300 K, the general correlation that the logarithm of the electrical conductivity varies linearly with the Seebeck coefficient on doping, but with a proportionality substantially in excess of a prediction from simple theory for a single type of mobile carrier. The correlation is unexpected in its universality and unfavorable in its consequences for thermoelectric applications. A standard model suggests that conduction by carriers of both signs may occur in these doped polymers, which thus leads to reduced thermoelectric efficiency. We also show that polyacetylene ~which is not air stable!, does exhibit the correlation with the expected proportionality, and, thus, its properties could be more favorable for thermoelectricity. © 1998 American Institute of Physics. [S0021-8979(98)05906-4]
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Date Issued
1998
Identifier
FSU_migr_chm_faculty_publications-0001, 10.1063/1.367119
Format
Citation
Corrosion Control Using Polyelectrolyte Multilayers
Title
Corrosion Control Using Polyelectrolyte Multilayers.
Creator
Farhat, Tarek, Schlenoff, Joseph B.
Abstract/Description
The corrosion of stainless steel under anodic conditions in salt solutions was strongly suppressed by an ultrathin layer of polyelectrolyte complex, applied using the layer-by-layer deposition method. Voltammetric scans over a wide potential region, as well as constant potential measurements in the metastable pitting regime, reveal the surprising effectiveness of polyelectrolyte multilayers, both hydrophilic and hydrophobic, at corrosion control, despite the significant water content and ion...
Show moreThe corrosion of stainless steel under anodic conditions in salt solutions was strongly suppressed by an ultrathin layer of polyelectrolyte complex, applied using the layer-by-layer deposition method. Voltammetric scans over a wide potential region, as well as constant potential measurements in the metastable pitting regime, reveal the surprising effectiveness of polyelectrolyte multilayers, both hydrophilic and hydrophobic, at corrosion control, despite the significant water content and ion permeability of the thin film.
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Date Issued
2002
Identifier
FSU_migr_chm_faculty_publications-0010, 10.1149/1.1452484
Format
Citation
Cyclic Voltammetry of Pristine, Isomerized, Deuterated, and Partially Hydrogenated "P-Type" Polyacetylene
Title
The Cyclic Voltammetry of Pristine, Isomerized, Deuterated, and Partially Hydrogenated "P-Type" Polyacetylene.
Creator
Schlenoff, Joseph B., Chien, James C. W.
Abstract/Description
The cyclic voltammetry of ultrathin fihns of polyacetylene comprised of 2-3 nm micro fibrils and their aggregate 20 nm fibrils in methylene chloride, acetonitrile, propylene carbonate, and sulfo]ane shows many similarities, including a background oxidation of electrolyte that leads to serious coulombic inefficiency in rechargeable polyacetylene battery applications. Reversible charging in neutral aqueous solution is limited by the poor separation between the reversible and irreversible...
Show moreThe cyclic voltammetry of ultrathin fihns of polyacetylene comprised of 2-3 nm micro fibrils and their aggregate 20 nm fibrils in methylene chloride, acetonitrile, propylene carbonate, and sulfo]ane shows many similarities, including a background oxidation of electrolyte that leads to serious coulombic inefficiency in rechargeable polyacetylene battery applications. Reversible charging in neutral aqueous solution is limited by the poor separation between the reversible and irreversible oxidations. Comparison of ultrathin and free-standing 100 ~m thick films showed they have the same maximum reversible doping level and thus energy density of 280 Wh/kg. Pristine, isomerized, deuterated, and hydrogenated [CH].,. show similar electrochemistry. Both n and p-type chemical doping caused isomerization of cis-[CHL to trans-[CH]~.
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Date Issued
1987
Identifier
FSU_migr_chm_faculty_publications-0007, 10.1149/1.2100848
Format
Citation
Electrochromism and Electrocatalysis in Viologen Polyelectrolyte Multilayers
Title
Electrochromism and Electrocatalysis in Viologen Polyelectrolyte Multilayers.
Creator
Stepp, Jason, Schlenoff, Joseph B.
Abstract/Description
Polyelectrolyte multilayers were constructed from a polyviologen and poly(styrene sulfonate) using an alternating polyion solution deposition technique. In situ absorption spectroscopy showed multilayers to be strongly electrochromic. Oxygen reduction at multilayercoated conducting glass electrodes was also shown to be facilitated.
Date Issued
1997
Identifier
FSU_migr_chm_faculty_publications-0002, 10.1149/1.1837709
Format
Citation
Rectified Ion Currents Through Ultrathin Polyelectrolyte Complex
Title
Rectified Ion Currents Through Ultrathin Polyelectrolyte Complex: Toward Chemical Transistors.
Creator
Salloum, David, Schlenoff, Joseph B.
Abstract/Description
We report an ion-conducting device comprising an ultrathin polyelectrolyte multilayer membrane assembled in a simple manner with water soluble polymers. Under the influence of external solution ionic strength ~salt concentration!, sites for ion transport are reversibly doped into the membrane. The device exhibits rectifying properties, preferring ions of lower charge, with a saturation ion current limited by diffusion. This system allows for the transduction of chemical potential into ion...
Show moreWe report an ion-conducting device comprising an ultrathin polyelectrolyte multilayer membrane assembled in a simple manner with water soluble polymers. Under the influence of external solution ionic strength ~salt concentration!, sites for ion transport are reversibly doped into the membrane. The device exhibits rectifying properties, preferring ions of lower charge, with a saturation ion current limited by diffusion. This system allows for the transduction of chemical potential into ion currents. Current/voltage curves spanning forward and reversed biased regimes are presented, together with linear and hyperlinear salt gating of ion currents.
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Date Issued
2004
Identifier
FSU_migr_chm_faculty_publications-0009, 10.1149/1.1799954
Format
Citation
Prospects for Using C60 and C70 in Lithium Batteries
Title
Prospects for Using C60 and C70 in Lithium Batteries.
Creator
Seger, L., Wen, L., Schlenoff, Joseph B.
Abstract/Description
Solid films of C60 and C70 fullerenes are evaluated in propylene carbonate/lithium perchlorate, an electrolyte commonly used in lithium batteries. Cyclic voltammetry, chronopotentiometry, and an effusion test, show that reduced C60 and C70 are soluble in the electrolyte tested, which, coupled with poor stability of the highly reduced material and poor electrochemical reversibility, would compromise the performance of secondary batteries based on these fullerenes.
Date Issued
1991
Identifier
FSU_migr_chm_faculty_publications-0005, 10.1149/1.2085516
Format
Citation
Evolution of Physical and Electrochemical Properties of Polypyrrole during Extended Oxidation
Title
Evolution of Physical and Electrochemical Properties of Polypyrrole during Extended Oxidation.
Creator
Schlenoff, Joseph B., Xu, Hong
Abstract/Description
The charge storage capacity and electrical conductivity of polypyrrole are followed through regimes of chemically reversible and irreversible electroactivity. Overoxidation of polypyrrole occurs at potentials in excess of 0.7 V vs. a saturated calomel electrode (SCE), as demonstrated by cyclic voltammetry of thin films. Material loss from polymer films as they are overoxidized is determined by in situ quartz microbalance experiments. The potential window for reversible electrochemistry in...
Show moreThe charge storage capacity and electrical conductivity of polypyrrole are followed through regimes of chemically reversible and irreversible electroactivity. Overoxidation of polypyrrole occurs at potentials in excess of 0.7 V vs. a saturated calomel electrode (SCE), as demonstrated by cyclic voltammetry of thin films. Material loss from polymer films as they are overoxidized is determined by in situ quartz microbalance experiments. The potential window for reversible electrochemistry in polypyrrole is compared to that for other conducting polymers. Reflectance FTIR of thick films reveals that hydroxyl groups, followed by carbonyls, result from overoxidation.
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Date Issued
1992
Identifier
FSU_migr_chm_faculty_publications-0004, 10.1149/1.2221238
Format
Citation
Magnetic and Transport Properties of Electrochemically Oxidized Polyacetylene
Title
Magnetic and Transport Properties of Electrochemically Oxidized Polyacetylene.
Creator
Reynolds, John, Schlenoff, Joseph B., Chien, James C. W.
Abstract/Description
The magnetic and transport properties of polyacetylene electrochemically oxidized in the presence of perchlorate ion have been determined. Room temperature dc conductivity is unaffected by doping between 10 -6 < y -< 10 -3~. A rapid conductivity increase occurs with increasing dopant level having a midpoint of transition at ca. y - 8 x 10-3 By comparison, the change in thermopower vs. y is sharper taking place within a tenfold increase in y with a midpoint at ca. y - 3 x 10 -3. The unparied...
Show moreThe magnetic and transport properties of polyacetylene electrochemically oxidized in the presence of perchlorate ion have been determined. Room temperature dc conductivity is unaffected by doping between 10 -6 < y -< 10 -3~. A rapid conductivity increase occurs with increasing dopant level having a midpoint of transition at ca. y - 8 x 10-3 By comparison, the change in thermopower vs. y is sharper taking place within a tenfold increase in y with a midpoint at ca. y - 3 x 10 -3. The unparied spin concentrations remain constant as dopant concentration increases before the onset of a Dysonian lineshape at ca. y -= 10 -2. The results are interpreted as the melting of a glassy carrier state causing the sharp change of transport properties. A phase separation into metallic domains occurs at y = ca. 10 -~. Side reactions involving the electrolyte complicate the electrochemistry of po]yacetylene.
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Date Issued
1985
Identifier
FSU_migr_chm_faculty_publications-0008, 10.1149/1.2114027
Format
Citation
Hermetic Sample Housing for X-ray Diffraction Studies
Title
Hermetic Sample Housing for X-ray Diffraction Studies.
Creator
Schlenoff, Joseph B., Rink, W. Jack, Mathias, H.
Abstract/Description
A portable sample housing has been constructed for room-temperature powder geometry X-ray diffraction analysis of samples that are air or moisture sensitive. The housing can be easily handled in a glovebox, providing a means for direct loading and X-ray measurements on samples that should not be exposed to air or moisture after preparation. Its design allows adaptation to various makes of diffractometer that are limited to flat sample geometry. The design offers several improvements over...
Show moreA portable sample housing has been constructed for room-temperature powder geometry X-ray diffraction analysis of samples that are air or moisture sensitive. The housing can be easily handled in a glovebox, providing a means for direct loading and X-ray measurements on samples that should not be exposed to air or moisture after preparation. Its design allows adaptation to various makes of diffractometer that are limited to flat sample geometry. The design offers several improvements over existing technology, including the accommodation of large-area thin films and single crystals. Sample preparation and alignment in the X-ray beam have been found to be easy and efficient. The two-layer X-ray window of the device reduces the diffracted intensity by 40%, without any change in the relative intensities of the peaks in the spectrum.
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Date Issued
1993
Identifier
FSU_migr_chm_faculty_publications-0012, 10.1107/S0021889893013822
Format
Citation
Human Coronary Artery Smooth Muscle Cell Responses to Bioactive Polyelectrolyte Multilayer Interfaces
Title
Human Coronary Artery Smooth Muscle Cell Responses to Bioactive Polyelectrolyte Multilayer Interfaces.
Creator
Newcomer, Robert, Moussallem, Maroun, Keller, Thomas C. S., Schlenoff, Joseph B., Sang, Qing-Xiang
Abstract/Description
Under normal physiological conditions, mature human coronary artery smooth muscle cells (hCASMCs) exhibit a "contractile" phenotype marked by low rates of proliferation and protein synthesis, but these cells possess the remarkable ability to dedifferentiate into a "synthetic" phenotype when stimulated by conditions of pathologic stress. A variety of polyelectrolyte multilayer (PEMU) films are shown here to exhibit bioactive properties that induce distinct responses from cultured hCASMCs....
Show moreUnder normal physiological conditions, mature human coronary artery smooth muscle cells (hCASMCs) exhibit a "contractile" phenotype marked by low rates of proliferation and protein synthesis, but these cells possess the remarkable ability to dedifferentiate into a "synthetic" phenotype when stimulated by conditions of pathologic stress. A variety of polyelectrolyte multilayer (PEMU) films are shown here to exhibit bioactive properties that induce distinct responses from cultured hCASMCs. Surfaces terminated with Nafion or poly(styrenesulfonic acid) (PSS) induce changes in the expression and organization of intracellular proteins, while a hydrophilic, zwitterionic copolymer of acrylic acid and 3-[2-(acrylamido)-ethyl dimethylammonio] propane sulfonate (PAA-co-PAEDAPS) is resistant to cell attachment and suppresses the formation of key cytoskeletal components. Differential expression of heat shock protein 90 and actin is observed, in terms of both their magnitude and cellular localization, and distinct cytoplasmic patterns of vimentin are seen. The ionophore A23187 induces contraction in confluent hCASMC cultures on Nafion-terminated surfaces. These results demonstrate that PEMU coatings exert direct effects on the cytoskeletal organization of attaching hCASMCs, impeding growth in some cases, inducing changes consistent with phenotypic modulation in others, and suggesting potential utility for PEMU surfaces as a coating for coronary artery stents and other implantable medical devices.
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Date Issued
2011
Identifier
FSU_migr_chm_faculty_publications-0011, 10.4061/2011/854068
Format
Citation
Numerical Simulation of the Cyclic Voltammogram of Polyacetylene
Title
Numerical Simulation of the Cyclic Voltammogram of Polyacetylene.
Creator
Diess, E., Haas, O., Schlenoff, Joseph B.
Abstract/Description
The measured cyclic voltammogram of a polyacety]ene-coated electrode bathed in an electrolyte solution was simulated numerically for various scan rates. The model used accounts for a modified Butler-Vo]mer-type heterogeneous kinetics at the electrode surface including a lateral interaction term which effects the observed hysteresis behavior. Within the polymer an electron flux obeying Ohm's law as well as electrolyte diffusion and migration is considered and Poisson's equation holds for...
Show moreThe measured cyclic voltammogram of a polyacety]ene-coated electrode bathed in an electrolyte solution was simulated numerically for various scan rates. The model used accounts for a modified Butler-Vo]mer-type heterogeneous kinetics at the electrode surface including a lateral interaction term which effects the observed hysteresis behavior. Within the polymer an electron flux obeying Ohm's law as well as electrolyte diffusion and migration is considered and Poisson's equation holds for electroneutrality. Donnan partition kinetics describes the flux and potential at the interface between the polymer and diffusion layer. Electrolyte diffusion is considered in the diffusion layer.
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Date Issued
1995
Identifier
FSU_migr_chm_faculty_publications-0003, 10.1149/1.2049971
Format
Citation