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

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.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:AEU.10048/983
Date06 1900
CreatorsXing, Xiao
ContributorsMcCreery, Richard L. (Chemistry), Buriak, Jillian M. (Chemistry), Shankar, Karthik (Electrical and Computer Engineering)
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
LanguageEnglish
Detected LanguageEnglish
TypeThesis
Format1960557 bytes, application/pdf

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