The role of surface chemistry in defining the energetics and kinetics of single electron tunneling through individual gold nanoparticles

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dc.contributor.advisor Orlin Velev, Committee Member en_US
dc.contributor.advisor Daniel L. Feldheim, Committee Chair en_US
dc.contributor.advisor Christopher Gorman, Committee Member en_US
dc.contributor.advisor Edmond Bowden, Committee Member en_US
dc.contributor.advisor Charles Boss, Committee Member en_US McConnell, Wyatt Parks en_US 2010-04-02T18:26:26Z 2010-04-02T18:26:26Z 2003-06-24 en_US
dc.identifier.other etd-06202003-012728 en_US
dc.description.abstract The properties of nanoscale materials are often dominated by their surface chemistry due to their increased surface-to-volume ratio. Metal nanoparticles with diameters smaller than ~12nm show a technologically relevant non-linear current-voltage response known as single electron tunneling. Gold nanoparticles offer an excellent platform for understanding how the surface chemistry of the metal island in a single electron-tunneling device can affect the current response of the structure. This is because the surfaces of these particles can be custom tailored using thiol-based self-assembled monolayer protocols that have been extensively developed for planar gold substrates. This dissertation describes STM measurements of single electron tunneling through individual gold nanoparticles of various sizes and surface chemistries in both air and solvent at room temperature and pressure. The voltage step-width of the resulting coulomb staircase was shown to be dependent on particle size. Solution experiments show that the energetics of single electron tunneling of particles with certain surface chemistries is dependent on the composition of the solution, while other surface chemistries can produce particles that give a stable single electron tunneling response in a wide variety of local chemical environments. Using acid and base terminated surface chemistries, particles were made that showed a defined response to a specific change in the local solution pH. The kinetics of single electron tunneling was also shown to be highly dependent on the chemical bond formed between the capping ligand and the metal particle. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject single electron tunneling en_US
dc.subject gold nanoparticles en_US
dc.subject surface chemistry en_US
dc.title The role of surface chemistry in defining the energetics and kinetics of single electron tunneling through individual gold nanoparticles en_US PhD en_US dissertation en_US Chemistry en_US

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