Degree Type

Dissertation

Date of Award

1992

Degree Name

Doctor of Philosophy

Department

Chemistry

First Advisor

Marc D. Porter

Abstract

A variety of chemically modified surfaces were constructed by the self-assembly method via chemisorption onto evaporated metal films. Monolayer films, self-assembled from solution, include n-alkanoic acids, CH[subscript]3(CH[subscript]2)[subscript] nCOOH, and n-perfluoroalkanoic acids, CF[subscript]3(CF[subscript]2)[subscript] nCOOH, on copper, and n-alkanethiolates, CH[subscript]3(CH[subscript]2)[subscript] nSH on copper. Monolayer films were obtained from the gas phase, a newly developed technique, for n-alkanoic acids on silver, and n-alkanethiolates on silver and gold. Multilayer films obtained by self-assembly from the gas phase include n-alkanoic acids at copper and silver and perfluoroacids at copper;Carboxylic acid terminated interfaces were formed by the self-assembly of the bifunctional mercaptoacids, HS(CH[subscript]2)[subscript] nCOOH, via the thiol moiety, at gold. These interfaces were derivatised with copper by deposition of a thin metal overlayer. The monolayer and multilayer films were characterized by optical ellipsometry, contact angle measurements, atomic force and scanning tunneling microscopies, and infrared reflection spectroscopy. Comparisons were made to properties of analogous bulk compounds. These techniques were used to determine the properties of these films such as composition, orientation, defectiveness, molecular ordering and environment, and hydrophobicity and reactivity.

DOI

https://doi.org/10.31274/rtd-180813-11166

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Earl Laird Smith

Language

en

Proquest ID

AAI9302017

File Format

application/pdf

File Size

147 pages

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