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Journal of Nanomaterials
Volume 2015, Article ID 826743, 6 pages
http://dx.doi.org/10.1155/2015/826743
Research Article

Size Control of Alloyed Cu-In-Zn-S Nanoflowers

Energy and Semiconductor Research Laboratory, Department of Physics, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany

Received 8 September 2015; Revised 28 October 2015; Accepted 29 October 2015

Academic Editor: Tupei Chen

Copyright © 2015 Björn Kempken et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Uniform, alloyed Cu-In-Zn-S nanoflowers with sizes of  nm and  nm composed of aggregated 4.1 nm and 5.6 nm primary crystallites, respectively, were obtained in a one-pot, heat-up reaction between copper, indium, and zinc acetate with tert-dodecanethiol in the presence of trioctylphosphine oxide. Larger aggregates were obtained by diluting tert-dodecanethiol with oleylamine, which lowered the reactivity of the indium and zinc precursors and led to the formation of copper rich particles. The thermal decomposition of tert-dodecanethiol stabilizing the primary crystallites induced their agglomeration, while the presence of trioctylphosphine oxide on the surface of the nanoflowers provided them with colloidal stability and prevented them from further aggregation.