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Study of the Growth of Capped ZnO Nanocrystals: A Route to Rational Synthesis

Viswanatha, Ranjani and Sarma, DD (2006) Study of the Growth of Capped ZnO Nanocrystals: A Route to Rational Synthesis. In: Chemistry - A European Journal, 12 (1). pp. 180-186.

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Abstract

We report the study of complex and unexpected dependencies of nanocrystal size as well as nanocrystal-size distribution on various reaction parameters in the synthesis of ZnO nanocrystals using poly(vinyl pyrollidone) (PVP) as a capping agent. This method establishes a qualitatively different growth mechanism to the anticipated Ostwald ripening behavior. The study of size-distribution kinetics and an understanding of the observed non-monotonic behaviors provides a route to rational synthesis. We used a simple, but accurate, approach to estimate the size-distribution function of nanocrystals from the UV-absorption spectrum. Our results demonstrate the accuracy and generality of this approach, and we also illustrate its application to various semiconducting nanocrystals, such as ZnO, ZnS, and CdSe, over a wide size range (1.8-5.3 nm).

Item Type: Journal Article
Additional Information: The copyright belongs to WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Keywords: crystal growth;crystal-size distribution;nanotechnology;semiconductors;time-resolved spectroscopy
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 29 Dec 2005
Last Modified: 19 Sep 2010 04:22
URI: http://eprints.iisc.ernet.in/id/eprint/4711

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