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Synthesis, characterization, and ele...
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University of California, Santa Barbara., Chemistry.
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Synthesis, characterization, and electronic tuning of nanostructured materials.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Synthesis, characterization, and electronic tuning of nanostructured materials./
作者:
Boettcher, Shannon W.
面頁冊數:
200 p.
附註:
Adviser: Galen D. Stucky.
Contained By:
Dissertation Abstracts International69-09B.
標題:
Chemistry, Inorganic. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3330464
ISBN:
9780549844761
Synthesis, characterization, and electronic tuning of nanostructured materials.
Boettcher, Shannon W.
Synthesis, characterization, and electronic tuning of nanostructured materials.
- 200 p.
Adviser: Galen D. Stucky.
Thesis (Ph.D.)--University of California, Santa Barbara, 2008.
Chemically synthesized nanostructured materials have the potential to impact fields ranging from energy conversion, electronics, and catalysis to fields such as chemical sensing, biotechnology and health care. This body of work describes the synthesis and characterization of two classes of chemically synthesized nanostructured materials with designed/tunable optical and electronic properties---mesostructured oxides and nanoparticle assemblies.
ISBN: 9780549844761Subjects--Topical Terms:
517253
Chemistry, Inorganic.
Synthesis, characterization, and electronic tuning of nanostructured materials.
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Chemically synthesized nanostructured materials have the potential to impact fields ranging from energy conversion, electronics, and catalysis to fields such as chemical sensing, biotechnology and health care. This body of work describes the synthesis and characterization of two classes of chemically synthesized nanostructured materials with designed/tunable optical and electronic properties---mesostructured oxides and nanoparticle assemblies.
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The first part of this thesis deals with controlling the electronic properties of materials and devices fabricated from solution-synthesized inorganic nanoparticles using electrochemistry and ligand chemistry. Solution-processed electronic materials such as these could play an important role in the fabrication of inexpensive large-area electronic devices, such as solar cells. We first demonstrate that interfaces between gold nanoparticle films and semiconductor substrates behave like Schottky diodes with the interfacial electronic structure tunable via electrochemically charging the nanoparticle film. These results are important for integrating nanoparticle-based devices with traditional semiconductor devices and have implications for the general understanding of semiconductor contacts.
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In a related study, we demonstrate a method to control the electrochemical doping/charging of inorganic nanoparticles by functionalizing them with ionic ligands. Charges injected into nanoparticle films can be precisely balanced by ionic charges covalently bound to the particle surface. This methodology allows for the synthesis of nanoparticle assemblies with characteristics similar to that of p and n-type semiconductors. These results are important, because doping nanocrystals using conventional methods (i.e. introduction of impurity atoms) has proved extremely challenging. Efforts continue to use this method to control charge transport and charge separation at interfaces between solution-processed p and n nanoparticles.
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The second part of this thesis describes how the chemical modification of molecular inorganic precursors can be used to control the structural, optical, and processing properties of surfactant-templated metal-oxide-based materials with ordered nanoscale features (mesostructured materials). Modification of titanium alkoxides with trifluoroacetic acid led to new titania-based hybrid waveguides (with a higher index-of-refraction than previously studied silica-based waveguides) and dye-doped laser materials. The synthesis and structural evolution of these materials have been elucidated at the molecular through macroscopic length scales. The developed carboxylate chemistry provides a platform from which to synthesize diverse multicomponent mesoporous oxides.
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