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Onset of sphalerite to wurtzite transformation in ZnS nanoparticles

Tiwary, Chandra Sekhar and Srivastava, Chandan and Kumbhakar, Pathik (2011) Onset of sphalerite to wurtzite transformation in ZnS nanoparticles. In: Journal of Applied Physics, 110 (3).

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Abstract

In this work, the incubation period for the onset of sphalerite to wurtzite transformation in isolated ZnS nanoparticles 2 to 7 nm in size was determined via the in situ isothermal annealing of as-synthesized sphalerite nanoparticles in a transmission electron microscope (TEM). Nanoparticles sitting on the TEM grid were well separated from each other in order to minimize particle sintering during the annealing operation. The phase transformation onset was observed at 300 degrees C, 350 degrees C, and 400 degrees C after 90, 10, and 4 min, respectively. These time-temperature data for the phase transformation onset were then used to calculate the activation energy for the nucleation of the wurtzite phase in 2 to 7 nm sphalerite particles. The activation energy determined was 24 Kcal/mol. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3622625]

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Sep 2011 11:27
Last Modified: 28 Sep 2011 11:27
URI: http://eprints.iisc.ernet.in/id/eprint/40786

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