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

    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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