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

R. Mendoza-Cruz, L. Bazán-Diaz, J. J. Velázquez-Salazar, J. E. Samaniego-Benitez, F. M. Ascencio-Aguirre, R. Herrera-Becerra, M. José-Yacamán, G. Guisbiers

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

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 these ordered structures are formed is totally unknown at the nanoscale. Consequently, to speed up the development of these 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.

Original languageEnglish (US)
Pages (from-to)9267-9274
Number of pages8
JournalNanoscale
Volume9
Issue number27
DOIs
StatePublished - Jul 21 2017
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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