Synthesis and Properties of the Self-Assembly of Gold-Copper Nanoparticles into Nanoribbons

Lourdes Bazán-Díaz, Rubén Mendoza-Cruz, J. Jesús Velázquez-Salazar, Germán Plascencia-Villa, Francisco Miguel Ascencio-Aguirre, H. Joazet Ojeda-Galván, Raúl Herrera-Becerra, Grégory Guisbiers, Miguel José-Yacamán

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We report the efficient wet-chemical production of self-assembled gold-copper bimetallic nanoparticles (diameter of ∼2 nm) into two-dimensional flexible ribbonlike nanostructures. The direct observation of a layered arrangement of particles into nanoribbons was provided through high-resolution transmission electron microscopy and electron tomography. These nanoribbons showed photoluminesce and efficient photocatalytic activity for the conversion of 4-nitrophenol. The thermal stability of the nanoribbons was also measured by in situ heat treatment in the electron microscope, confirming that the self-assembled gold-copper nanoribbons efficiently supported up to 350 °C. The final morphology of the nanoparticles and their ability to self-assemble into flexible nanoribbons were dependent on concentration and the ratio of precursors. Therefore, these experimental factors were discussed. Remarkably, the presence of copper was found to be critical to triggering the self-assembly of nanoparticles into ordered layered structures. These results for the synthesis and stability of self-assemblies of metallic nanoparticles present a potential extension of the method to producing materials with catalytic applications.

Original languageEnglish (US)
Pages (from-to)9394-9401
Number of pages8
JournalLangmuir
Volume34
Issue number32
DOIs
StatePublished - Aug 14 2018
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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