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Nonlinear I-V characteristics of nanocrystalline SnO2

Bose, AC and Thangadurai, P and Ramasamy, S and Ganesan, V and Asokan, S (2006) Nonlinear I-V characteristics of nanocrystalline SnO2. In: Nanotechnology, 17 (6). pp. 1752-1757.

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Abstract

Current versus voltage characteristics (I-V) of nanocrystalline SnO2 materials have been investigated in air at room temperature. The samples were prepared by the inert gas condensation technique (IGCT) as well as by chemical methods. X-ray diffraction studies showed a tetragonal rutile structure for all the samples. Microstructural studies were performed with transmission electron microscopy. All the samples exhibited nonlinear I-V characteristics of the current-controlled negative resistance (CCNR) type. The results show that the threshold field (break down) voltage is higher for the samples prepared by the IGCT method than for those prepared by the chemical method due to the formation of a tin oxide layer over the crystalline tin. It is also found that the threshold field increases with the decrease in grain size.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Institute of Physics Publishing.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Date Deposited: 25 Sep 2010 07:26
Last Modified: 25 Sep 2010 07:26
URI: http://eprints.iisc.ernet.in/id/eprint/31640

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