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Layer-by-layer assembly of multilayers on carbon surfaces and molecular electronic junctions Open Access


Other title
covalent multilayers
molecular electronic junction
layer-by-layer assembly
Type of item
Degree grantor
University of Alberta
Author or creator
Xing, Xiao
Supervisor and department
McCreery, Richard L. (Chemistry)
Buriak, Jillian M. (Chemistry)
Examining committee member and department
Shankar, Karthik (Electrical and Computer Engineering)
Department of Chemistry

Date accepted
Graduation date
Master of Science
Degree level
In the research described in this thesis, two molecular layers were successfully anchored on carbon surfaces (pyrolyzed photoresist films, PPFs) sequentially through two independent approaches. The first molecular layer, styrene, was covalently bonded on PPF surfaces via the method of reduction of in situ generated diazonium ions. The resulting molecular films were characterized by AFM measurements, and catechol and ferrocyanide voltammetry. The second molecular layer, ferrocene-thiol, was anchored on top of the first molecular layer through the method of thiol-ene reaction, which is an effective method for building up multilayers through layer-by-layer assembly. As ferrocene is an electrochemically active species, quantitative surface coverage was calculated according to the amount of surface-bound ferrocene through electrochemical measurements. Finally, molecular junctions were fabricated by depositing metal top contacts based on the molecular layers through electron-beam evaporation and the electronic characteristics of these molecular junctions were investigated.
License granted by Xiao Xing ( on 2010-01-29T15:54:01Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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