Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Physical Chemistry Chemical Physics Volume: 16 Issue: 37 Pages: 20127-20137 Published: 2014

27 de setembro de 2013 Rose Portasio Artigo 0

zinc-blende-versus-wurtzite-zns-nanoparticles-control-of-the-phase-and-optical-properties-by-tetrabutylammonium-hydroxide — We demonstrated phase control, mediated by the presence of etrabutylammonium hydroxide, in the growth of ZnS crystal that by using a low cost effectiven MAS method, a very moderate temperature (140 °C) and a very fast reaction time are sufficient to produce nanostructures with good degree of crystallinity.

Writers: F. A. La Porta, J. Andrés, M. S. Li, J. R. Sambrano, J. A. Varela, E. Longo

Keywords: nanoparticles; method; performance

Abstract: The influence of tetrabutylammonium hydroxide on the phase composition (cubic zinc blende versus hexagonal wurtzite) of ZnS nanoparticles was studied. The ZnS nanoparticles were prepared by a microwave-assisted solvothermal method, and the phase structure and optical properties along with the growth process of ZnS nanoparticles were studied. We report XRD, FE-SEM, EDXS, UV-vis and PL measurements, and first-principles calculations based on TDDFT methods in order to investigate the structural and electronic properties and the growth mechanism of ZnS nanostructures. The effects as well as the merits of microwave heating on the process and characteristics of the obtained ZnS nanostructures and their performance are reported.

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DOI: 10.1039/c4cp02611j