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Templated growth of platinum nanostructures

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/10309

Templated growth of platinum nanostructures

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Title: Templated growth of platinum nanostructures
Author: Garcia, Robert
Advisor(s): Brinker, Jeffrey
Van Swol, Frank
Committee Member(s): Ward, Tim
Song, Yujiang
Shelnutt, John
Department: University of New Mexico. Dept. of Chemical and Nuclear Engineering
Subject(s): Platinum
Nanostructures
Nanowheels
Nanospheres
Templated Growth
LC Subject(s): Nanostructured materials--Design and construction.
Platinum catalysts.
Chemical templates.
Degree Level: Masters
Abstract: Novel platinum nanostructures were synthesized by templating the growth of platinum on treated polymer surfaces and within disk-like aqueous bicellar assemblies. The growth mechanisms of all structures were examined in detail. Platinum hollow nanospheres with uniform shell thickness were prepared by the seeded growth of platinum on the surface of latex beads with an adsorbed porphyrin photocatalyst followed by core removal. Templating bicelles of a high yield were synthesized for the first time and verified by electron microscopy. Dendritic platinum nanowheels were obtained as a result of confined growth within the bicellar interior. Sintering experiments revealed an unusual stability of the nanowheels prompting further examination of their catalytic properties. The nanowheels have similar catalytic performance to a commercial catalyst but provide an improvement in stability. These platinum nanostructures have advantages over bulk catalyst as a result of improved surface to volume ratios leading to reduced costs in catalytic applications.
Graduation Date: December 2009
URI: http://hdl.handle.net/1928/10309

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