University of Illinois Urbana-Champaign

Metal Oxide-Modified Metal Nanoparticles: Synthesis, Characterization, and Catalytic Behavior

Flynn, Nolan Thomas

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https://hdl.handle.net/2142/84037

Description

Title
Metal Oxide-Modified Metal Nanoparticles: Synthesis, Characterization, and Catalytic Behavior
Author(s)
Flynn, Nolan Thomas
Issue Date
2001
Doctoral Committee Chair(s)
Gewirth, Andrew A.
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Materials Science
Language
eng
Abstract
To explore surface enhancement effects in Raman spectroscopy, colloidal gold particles (11.2 nm) were coated with platinum overlayers resulting in bimetallic particles with 1--8 mole percentage Pt. These particles were characterized using electron microscopy, energy-dispersive X-ray spectroscopy and electrochemistry, confirming the Au-Pt core-shell structure. The UV-visible spectra showed only minimal red shifts with increasing Pt content. Raman spectra, on the other hand, changed dramatically with slight increases in Pt, resulting in a loss of appreciable surface-enhancement effects by 4 mole percent Pt.
Graduation Semester
2001
Type of Resource
text
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http://hdl.handle.net/2142/84037

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