Electronic Properties of Wires Fabricated via Dielectrophoresis of Colloidal Gold Nanoparticles

Abstract:

Gold nanoparticles were fabricated via the precipitation of gold that follows the reduction of tetrachloroauric acid in the presence of a ligand such as citric acid. Synthesis and stabilization of gold nanoparticles has been achieved in a variety of solution environments whose character ranges from polar (water) to non-polar such as dodecane. The size of the nanoparticles was measured through Mie theory analysis of extinction of UV-visible spectra and transmission electron microscope (TEM) images of particles dried onto a TEM grid. Successful mechanical ‘break-junction’ experiments in air and in the colloidal solutions demonstrate that the lowdimensional transport character observed in such experiments is not significantly affected by the solution/environment. Evidence has been obtained that, at and near the time of formation, the dielectrophoretically-grown wires formed within these colloidal suspensions have similar electrical transport characteristics to those found in mechanical break junctions.

• Periodical: Key Engineering Materials (Volume 314)
• Pages: 121-126
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.314.121
• Online since: July 2006
• Authors: Derek R. Oliver, C.T. Harrower
• Keywords: Dielectrophoresis, Gold Nanoparticles (GNP), Landauer Conductance, Molecular Electronics

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