Title

Electrical transport properties of peptide nanotubes coated with gold nanoparticles via peptide-induced biomineralization

Authors

Authors

S. Shekhar; L. Anjia; H. Matsui;S. I. Khondaker

Comments

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Abbreviated Journal Title

Nanotechnology

Keywords

COLLOIDAL NANOCRYSTALS; GROWTH; ARRAYS; SIZE; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied

Abstract

We present temperature dependent electrical transport measurements of peptide nanotube devices coated with monodisperse arrays of gold nanoparticles (AuNP). As the temperature is lowered, the current-voltage (I-V) characteristics become increasingly nonlinear and below 20 K conduction only occurs above a threshold voltage V(T). The current follows the scaling behavior I proportional to [(V - V(T))/V(T)](alpha) for V > V(T) with alpha similar to 2.5 signifying two-dimensional (2D) charge transport. The temperature dependence of the resistance shows thermally activated behavior with an activation energy of 18.2 meV corresponding to the sequential tunneling of charges through 6 nm monodispersed AuNP arrays grown on a peptide surface.

Journal Title

Nanotechnology

Volume

22

Issue/Number

9

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000286622000005

ISSN

0957-4484

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