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Study of the growth of capped ZnO nanocrystals: A route to rational synthesis

Viswanatha, R 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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We report the study of complex and unexpected dependencies of nanocrystal size as well as nanocrystalsize 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
Publication: Chemistry -A European Journal
Publisher: John Wiley & Sons
Additional Information: Copyright of this article belongs to John Wiley & Sons.
Keywords: crystal growth; crystal-size distribution; nanotechnology; semiconductors; time-resolved spectroscopy.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 20 Oct 2010 05:22
Last Modified: 20 Oct 2010 05:22
URI: http://eprints.iisc.ac.in/id/eprint/32906

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