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Permanent link (DOI): https://doi.org/10.7939/R3H40W

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Fabrication of graphitic carbon nanostructures and their electrochemical applications Open Access

Descriptions

Other title
Subject/Keyword
Electrochemistry
Nanofabrication
E-beam lithography
Graphite
Raman
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Du, Rongbing
Supervisor and department
McDermott, Mark (Chemistry)
Examining committee member and department
Harrison, D. Jed (Chemistry)
McCreery, Richard (Chemistry)
Brett, Michael (Electrical & Computer Engineering)
McCarley, Robin (Chemistry)
Buriak, Jillian (Chemistry)
Department
Department of Chemistry
Specialization

Date accepted
2010-01-29T20:25:07Z
Graduation date
2010-06
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
New methods to fabricate nanometer sized structures will be a major driving force in transforming nanoscience to nanotechnology. There are numerous examples of the incorporation of nanoscale structures or materials enhancing the functionality of a device. Graphitic carbon is a widely used material in electroanalysis due to a number of advantageous properties such as wide potential window, low cost, mechanical stability, and applicability to many common redox systems. In this thesis, the fabrication of nanometer sized graphitic carbon structures is described. These structures were fabricated by using a combination of electron-beam lithography (EBL) and pyrolysis. EBL allows for the precise control of shape, size and location of these carbon nanostructures. The structure and electrochemical reactivity of thin films of the pyrolyzed material is initially examined. The methodology to fabricate nanosized carbon structures and the structural and electrical characterization of the nanostructure is presented. The nanometer sized carbon structures fabricated in this work are being applied as nanoelectrodes. For nanoband structures, we observe a limiting current plateau which is characteristic of radial diffusion to cylindrical ultramicroelectrodes. Their voltammetric behaviour shows good agreement with classical theoretical predictions. Both carbon film and nanoband electrodes have been used as substrates for metal electrodeposition. The size and morphology of the deposited Au particles depends greatly on the substrate. On the nanoband electrodes, the Au particles exhibit a multi-branched or dendridic morphology. Their size and surface area are much larger than those electrodeposited on the carbon film electrode under the same conditions. The surface enhanced Raman spectroscopy (SERS) properties of the gold deposited on the nanobands was studied. A high enhancement in Raman intensity for a molecular layer on the nanoband supported gold is observed.
Language
English
DOI
doi:10.7939/R3H40W
Rights
License granted by Rongbing Du (rdu@ualberta.ca) on 2010-01-29T15:06:18Z (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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