Determination of the threshold of nanoparticle behavior: Structural and electronic properties study of nano-sized copper

Juan J. Torres-Vega, L. R. Medrano, Carlos Vladimir Landauro Saenz, J. Rojas-Tapia

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In the present work we determine the threshold of the nanoparticle behavior of copper nanoparticles by studying their structural and electronic properties. The studied nanoparticles contain from 13 to 8217 atoms and were obtained by molecular dynamics simulations using the Johnson potential for copper based on the embedded atom method. The results indicate that for small copper nanoparticles (<1000atoms, ~2.8 nm) the surface plays an important role in their physical properties. Whereas, for large nanoparticles (>2000atoms, ~3.5 nm), with spherical-like external shape and large percentage of fcc-like local structure, this effect is negligible and their electronic character are similar to such expected in solid copper. Finally, it has also been shown that copper nanoparticles change their electronic character, from metallic to insulating, after increasing the strength of the chemical disorder.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalPhysica B: Condensed Matter
Volume436
DOIs
StatePublished - 1 Mar 2014
Externally publishedYes

Bibliographical note

Funding Information:
L.R. Medrano is grateful to CONCYTEC for the financial support for the development of this work through the Post-graduate Scholarship Program 2010 for Peruvian Universities. J.J. Torres is grateful to Andres Bello University for Doctoral Scholarship.

Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.

Keywords

  • Copper nanoparticle
  • Electronic properties
  • Molecular dynamics simulation
  • Structural transition

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