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Order-disorder phase transitions in Au-Cu nanocubes: from nano-thermodynamics to synthesis

Abstract

Catalysts have been widely used in industries and can be optimized by tuning the composition and chemical ordering of the elements involved in the nano-alloy. Among bi-metallic alloys, the Au-Cu system is of particular interest because it exhibits ordered phases at low temperatures. Nevertheless, the temperature at which those ordered structures forms is totally unknown at the nanoscale. Consequently, to speed up the development of those catalysts, this paper theoretically predicts the structural phase transitions between ordered and disordered phases for the Au-Cu system by using nano-thermodynamics. Following the predictions, the suggested annealing temperatures have been carefully chosen and consequently, Au-Cu ordered nanocubes have been successfully synthesized through a solventless protocol. The results are fully supported by electron microscopy observations.

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Publication details

The article was received on 02 Jan 2017, accepted on 08 May 2017 and first published on 10 May 2017


Article type: Communication
DOI: 10.1039/C7NR00028F
Citation: Nanoscale, 2017, Accepted Manuscript
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    Order-disorder phase transitions in Au-Cu nanocubes: from nano-thermodynamics to synthesis

    R. Mendoza-Cruz, L. Bazan-Diaz, J. J. Velazquez-Salazar, J. E. Samaniego-Benitez, F. M. Ascencio, R. Herrera-Becerra, M. Jose - Yacaman and G. Guisbiers, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR00028F

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