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Preparation and characterization of multiwall carbon nanotube/polypyrrole coaxial fibrils

Bhatia, Ravi and Sangeeth, Suchand CS and Prasad, V and Menon, Reghu (2011) Preparation and characterization of multiwall carbon nanotube/polypyrrole coaxial fibrils. In: Physica B: Condensed Matter, 406 (9). pp. 1727-1732.

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Official URL: http://dx.doi.org/10.1016/j.physb.2011.02.016

Abstract

Multiwall carbon nanotube (MWNT)/polypyrrole (PPy) fibrils were fabricated by template-free in situ electrochemical deposition of PPy over MWNTs, and characterized by electron microscopy and electrical measurements. Scanning and transmission electron microscopy studies reveal that PPy coating on the surface of nanotube is quite uniform throughout the length, with the possibility of forming unique Y-junctions. Current (I)-voltage (V) characteristics at various temperatures show nonlinearity due to tunneling and hopping contributions to transport across the barriers. AC conductivity measurements (300-4.2 K) show that the onset frequency scales with temperature, and the nanoscale connectivity in MWNT/PPy fibrils decreases with the lowering of temperature. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science B.V.
Keywords: Multiwall carbon nanotubes;Composites;Electron microscopy; Electrical characterizations
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 15 Jun 2011 06:20
Last Modified: 15 Jun 2011 06:20
URI: http://eprints.iisc.ac.in/id/eprint/37800

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