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REBCO coated conductors have recently become viable for high field superconducting magnets, but their use brings new challenges. Knowledge of the transport critical current density over a wide range of magnetic field and temperature, Jc...
The spinel vanadate CoV2O4 is a magnetically frustrated system with an interesting non-collinear spin texture at low temperatures. The magnetic frustration in the system arises from the arrangement of atoms in the structure of the...
A new numerical method is developed for the solution of the diffusion problem in a system of several materials. In such a system, the diffusion coefficients are piecewise continuous and jumps in their values can occur across the complex...
Oxide ceramics are materials with a wide range of properties. Insulators are most common, however semiconductors, strongly correlated electron materials, and even superconductors are all relevant oxide materials. Here we seek to...
Buckypaper (BP) is a macroscopic aggregate of carbon nanotubes. More specifically, it is an easy-to-handle thin film formed from carbon nanotube networks. Buckypaper contains valuable high mechanical strength, electrical, and thermal...
Self-assembled bilayers consisting of a monolayer of molecules, a metal linking ion and a second molecular layer were prepared and used in controlling critical energy and electron transfer events in dye-sensitized solar cells (DSSCs)....
Nanoparticles have been extensively studied in the past few decades due to the possibilities they offer in applications ranging from medicine to energy generation. A new class of ultra-small noble metal nanoparticles consisting of tens...
Developing functional inorganic nanocrystals for biomedical uses, such as cellular labeling, bio-imaging and optical sensing, has attracted great momentum and many activities in both academia and industry over the past two decades. Many...
This dissertation is composed into two primary portions defined by the material types investigated. The first part is concerned with the magneto- and thermo-optical properties of trivalent lanthanide-doped metal-oxides using europium as...
Polyelectrolytes can be used in a variety of forms from Layer-by-Layer assembled thin films to spun polyelectrolyte complex as free-standing membranes. The Layer-by-Layer methodology is used to adsorb oppositely charged polyelectrolytes...
Weight of a material and the system formed by such material is a critical factor for many applications. Traditionally, engineering designed porous structures, typically honeycomb structures, have been utilized for weight critical...
The isothermal and non-isothermal crystallization kinetics of poly (propylene succinate) stereocomplex over a broad range of temperatures has been studied. Crystallization peaks from Differential Scanning Calorimeter are only observed...
The dynamic self-organization of lipids in biological systems is a highly regulated process that enables the compartmentalization of living systems at microscopic and nanoscopic levels. Exploiting the self-organization and innate...
This doctoral thesis encompasses wide expanses of studies, which aim to advance the understanding of structure-property relationships in fast ion conductors (FICs) with a variety of characterization tools. In particular, powder X-ray...
This dissertation mainly focuses on the investigation of the magnetic phase diagram of quasi two di- mensional triangular lattice antiferromagnets (TLAFs) Ba₃MNb₂O9 (M = Co2+ (S = 1/2), Mn2+ (S = 5/2)), and their multiferroic properties....
This dissertation explores the formation and significance of the screenscape in popular culture. A screenscape encompasses the mixture of screens and bodies that enter into and transform the aesthetic quality of social space. After...
The United States has long had traditions of both religious and secular millenarian anticipation as well as violent rebellions against political authority. From the Cold War forward, these formerly separate aspects of American culture...
The growing environmental concern over carbon dioxide emission has driven the demand for next-generation green vehicles like electric vehicles (EVs) and hybrid electric vehicles (HEVs). This in turn calls for higher capacity and higher...
Photon upconversion (UC) is a unique process that has garnered increased interest in the past decade as a way to harness lower energy photons and convert them to higher energy for use in a host of applications. In molecular UC, a...
The narrow band gap semiconductor iron antimonide, FeSb2, has been grown as bulk single crystals, and investigated for its electronic and magnetic properties at low temperatures. The electronic behavior of FeSb2 is associated with strong...
In this dissertation, microwave chemistry is employed to synthesize a variety of different crystalline nanoparticles (NPs). This introduction will describe the structures, properties and applications of the NPs studied within the...
This thesis is a continuous effort contributed to the field of developing a new type of functional porous materials - Nanocarbon Foam (NCF) by crosslinking multi-walled carbon nanotubes (MWNTs) into networks in three-dimensional (3D)....
The deployment of high flux magnetic processing in industry requires the ability to model the expected results of a proposed processing, and the current assumptions in the literature did not reflect the actual outcome in measurements of...
A bio-inspired, modular terpolymer adhesive has been synthesized containing three different functionalities: a photocrosslinking segment, wet adhesion segment, and a water soluble segment. Wet adhesion is brought on by an amino acid from...
Simulation is valuable since it can provide a link between theory and experiment. Whereas, com- puter modeling is based on theory and is limited to simple models, we can explore many physical properties in a parallel way to experiment....
Geometrically frustrated systems have garnered much interest in recent times due to the emergence of novel magnetic states in these systems that contrast traditional cooperative magnetic phenomena. The spin ice pyrochlores Ho2Ti2O7 and...
Spin-polarized unrestricted density functional theory is used to calculate the molecular properties of magnetic semiconductor quantum dots doped with 3d-metal atoms. We calculate total energies of the low spin antiferromagnetically...
Understanding Slow Dynamics in Polymers Using Coarse-Grained Molecular Dynamics Simulations: Microphase Separation in Block Copolyelectrolytes and Photo-Switching in Azobenzene-Polymers
Tracking slow dynamics in polymers is very challenging using all-atomistic molecular dynamics simulations due to the vast range of time scales involved. Therefore, there are urgent needs to develop coarse-grained modeling schemes to meet...
In many composite materials, rigid fibers are distributed throughout the material to tune the mechanical, thermal, and electric properties of the composite. The orientation and distribution of the fibers play a critical role in the...
The National High Magnetic Field Laboratory is building a world record all superconducting magnet known as the "32T". It requires many thousands of parts, but in particular one kind is unusually expensive to manufacture, called "heater...
Poly-ϵ-caprolactone (PCL) based copolymers have received much attention as drug or growth factor delivery carriers and tissue engineering scaffolds due to their biocompatibility, biodegradability, and tunable biophysical properties....
This dissertation is focused on the study of a series of paramagnetic materials from molecular to nanoscale with increasing number of transition metal ions. We have successfully used techniques like SQUID magnetometry, high frequency...
Semiconductor spintronics is widely regarded as a viable pathway to overcome many of the physical limitations of the present micro-electronics technology. Electrical spin injection into a semiconductor, coherent transport and...
Thermoelectric technology has been treated as a candidate to convert heat into electricity and reuse the waste heat. By using the body heat, the thermoelectric generator is promising to apply to wearable devices as the power source. The...
Computational material simulation is becoming more and more important as a branch of material science. Depending on the scale of the systems, there are many simulation methods, i.e. first-principles calculation (or ab-initio), molecular...
Colloidal semiconductor quantum dots (QDs) are inorganic nanocrystals that possess several unique photophysical properties, including tunable narrow emission and remarkable photo- and chemical stability. They have large surface areas, ...
A novel electrochemical cell design based on yarn or fiber-like carbon nanotube electrodes was developed as an engineered solution for flexible electrochemical devices, namely electrical energy storage devices. Proof-of-concept cells...
This PhD thesis is devoted to investigation of inorganic materials with low-dimensional structures. Such materials attract significant fundamental and applied interest due to the potential to achieve highly anisotropic properties, which...
In this work, various transition and main group metals were heated in a low temperature molten sulfur/iodine flux to produce metal sulfides and metal sulfide iodides, in a one-pot synthesis method that eliminates the use of toxic or...
A novel ceramic-polymer hybrid composite is fabricated by co-curing lay-up process to combine a carbon nanotube (CNT) reinforced ceramic composite film with a carbon fiber reinforced polymer (CFRP) composite substrate. A transition layer...
Sapphire is presently being utilized in optical based pressure traducers for use in measuring pressure at high temperatures. The robustness of sapphire makes it an ideal material for use as a high temperature sensor; however, not without...
Halide perovskite materials have emerged in the past few years as promising materials in the absorption layer of photovoltaic cells and new emissive materials for use in light emitting diodes (LEDs). This is due to their rapidly...
REBCO (REBa2Cu3O7-δ, RE=rare earth elements) coated conductor (CC) is one of the best candidates for building high-field magnets and it has been improved greatly in recent years. CC overcome the grain boundary problem by using either a...
Non-covalent molecular interactions are a ubiquitous part of molecular interaction and the driving force behind macromolecules and host-guest binding. However, a more recent non-covalent molecular interaction, the cation-π interaction, ...
Irradiation alters the local stoichiometry of oxides significantly. The resulting stoichiometric changes play a critical role in the dynamics of defects and microstructure evolution in oxides under irradiation. Stoichiometry in oxides is...
Polymer matrix composites are increasingly used in aerospace applications due to their high specific properties. Recently, wide application of composite materials leads to extensive research in improving manufacturing processes to...
As research progresses towards nanoscale materials, there has become a need for a more efficient and effective way to obtain ultra-thin samples for imaging under transmission electron microscope (TEM) for atomic resolution analysis....
Microcontact printing (μCP) is a soft lithographic technique based on transferring an ink material from a stamp on to a substrate through physical contact to produce features at the micrometer scale. Compared to other surface-patterning...
Cells sense and respond to topographical cues in their microenvironment that influence growth, development, and migration. Cell migration and outgrowth assays have been used to study cellular movement or changes in cellular morphology...
In order to create a polymer that has the morphology and structure to be used for industrial applications, the foamability of the PLA must be improved by blending. Blends were made in specific ratios of 80/20, 50/50, and 20/80. Next, the...
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