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We have synthesized stable, highly luminescent silica xerogels as well as optically transparent, stable aerogels that were embedded with 2.5 nm and 6 nm CdSe and 6 nm InP quantum dots. By capping the quantum dot with 3-aminopropyltriethoxysilane, a dot is able to condense within the structure of a forming silica gel. This network keeps the quantum dot in place during the solvent exchange procedure necessary to form low-density silica aerogels using supercritical drying procedures. The resulting aerogel networks show a high surface area of 789.7 m2/g and xerogels show a surface area of 448 m2/g, with a pore size of 3.16 nm. Materials created are stable under atmospheric conditions and up to temperatures of 150?C.
Quantum dot, Sol-gel, CdSe, Aerogel, Critical point drying
Date of Defense
December 1, 2005.
A Thesis Submitted to the Department of Chemistry and Biochemistry in Partial Fulfillment of the Requirements for the Degree of Masters of Science.
Includes bibliographical references.
Florida State University
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