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Occurrence of Polytypism in Compound Colloidal Metal Chalcogenide Nanocrystals, Opportunities, and Challenges

jz-2015-013116_0007

Link to paper

Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
J. Phys. Chem. Lett., 2015, 6 (16), pp 3141–3148
DOI: 10.1021/acs.jpclett.5b01311
Publication Date (Web): July 30, 2015
Copyright © 2015 American Chemical Society
This Perspective will look at the occurrence of polytypism in colloidal nanocrystals of metal chalcogenides. The low energy barrier between growth in wurtzite and zincblende crystal phases allows the occurrence of both in a single particle which has a dramatic influence on shape control. To date, various strategies have been employed to understand and control this phenomenon leading to a range of particle shapes across a wide range of semiconductor compositions from the archetypal cadmium selenide to the more recently studied compound copper chalcogenide nanocrystals such as dicopper–zinc–tin tetrasulfide and copper indium gallium selenide systems. The Perspective will also look at the control factors for polytypism in colloidal nanocrystals and the impact of polytypism on end-use applications.