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Nonlinear Transport in Hybrid Polypyrrole-Gold Nanostructures

Mtsuko, Davie and Ahlskog, Markus and Menon, Reghu (2010) Nonlinear Transport in Hybrid Polypyrrole-Gold Nanostructures. In: Journal of Nanoscience and Nanotechnology, 10 (12). pp. 8185-8190.

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We have studied charge transport in nanometer scale films of polypyrrole (PPy) that were grown electrochemically onto discontinuous ultrathin films of gold. The gold films consisted of 100 nm size islands, separated from each other by nanometer-size gaps. The thickness of PPy can be varied from 30 to 200 nm. The I-V characteristics of these hybrid PPy-Au nanostructures show strong non-linearity at low temperatures, and in particular for the more insulating samples. The hopping transport is further verified from the log / versus V-1/4 plots. Furthermore, the I-V data follow an empirical relation dlog//dV(1/4) similar to T-1/2.

Item Type: Journal Article
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Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Mesoscopic Transport; Conducting Polymers; Polypyrrole
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 08 Dec 2010 11:37
Last Modified: 20 Dec 2010 07:13
URI: http://eprints.iisc.ernet.in/id/eprint/34311

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