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Self Assembly and Electronic Structure of ZnO Nanocrystals

Viswanatha, Ranjani and Santra, Pralay K. and Sarma, DD (2009) Self Assembly and Electronic Structure of ZnO Nanocrystals. In: Journal Of Cluster Science, 20 (2). pp. 389-398.

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Abstract

In this paper, we report the synthesis and self assembly of various sizes of ZnO nanocrystals. While the crystal structure and the quantum confinement of nanocrystals were mainly characterized using XRD and UV absorption spectra, the self assembly and long range ordering were studied using scanning tunneling microscopy after spin casting the nanocrystal film on the highly oriented pyrolytic graphite surface. We observe self assembly of these nanocrystals over large areas making them ideal candidates for various potential applications. Further, the electronic structure of the individual dots is obtained from the current-voltage characteristics of the dots using scanning tunneling spectroscopy and compared with the density of states obtained from the tight binding calculations. We observe an excellent agreement with the experimentally obtained local density of states and the theoretically calculated density of states.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer/Plenum Publishers
Keywords: ZnO nanocrystals; Self assembly; Scanning tunneling microscopy
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 21 Dec 2009 08:57
Last Modified: 19 Sep 2010 05:43
URI: http://eprints.iisc.ernet.in/id/eprint/22742

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