Scanning tunneling microscopy and spectroscopy of Se and Te nanorods

Gautam, Ujjal K and Gundiah, Gautam and Kulkarni, GU (2005) Scanning tunneling microscopy and spectroscopy of Se and Te nanorods. In: Solid State Communications, 136 (3). pp. 169-172.

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Abstract

Se and Te nanorods obtained by a self-seeding solution growth process have been examined by scanning tunneling microscopy and spectroscopy(STM/STS). The diameters of the rods, as revealed by STM images were in the range of 1060 nm, with aspect ratios of 10-20. The I-V data of the Se and Te nanorods exhibit band gaps of similar to 1.3 and similar to 0.4 eV, respectively, nearly independent of the diameter, and these values are close to the bulk values of Se and Te. In both the cases,the nanorods possess a small but finite conductance even in the bandgap regions, the conductance value increasing with the diameter of the rod. A tunneling mechanism involving the surface states is proposed to explain this phenomenon.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Pergamon-Elsevier Science Ltd
Additional Information:	Copyright for this article belongs to Elsevier.
Keywords:	A. Nanostructures;C. Scanning tunneling microscopy and spectroscopy;D. Electronic transport
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	24 Oct 2005
Last Modified:	19 Sep 2010 04:20
URI:	http://eprints.iisc.ac.in/id/eprint/3889

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