Interrogating the Electrochemical Interface Using Sum Frequency Generation Spectroscopy
Schultz, Zachary Dale
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https://hdl.handle.net/2142/84202
Description
Title
Interrogating the Electrochemical Interface Using Sum Frequency Generation Spectroscopy
Author(s)
Schultz, Zachary Dale
Issue Date
2005
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)
Chemistry, Physical
Language
eng
Abstract
SFG in tandem with electrochemical capacitance and CV measurements are used to study the effects of applied potential on the adsorption and orientation of PABA at a Ag(111) surface. The data indicates that PABA changes orientation in response to the charge on the electrode surface, orienting one way positive of the potential of zero charge (pzc) and oppositely negative of the pzc. At positive potentials a phase change is observed associated with the formation of a condensed layer. These results show that the orientation of small molecule zwitterions can be controlled by applied potential.
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