Atomic and electronic structure transformations of silver nanoparticles under rapid cooling conditions

I. Lobato, J. Rojas, C. V. Landauro, J. Torres

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The structural evolution and dynamics of silver nanodrops Ag2869 (4.4nm in diameter) under rapid cooling conditions have been studied by means of molecular dynamics simulations and electronic density of state calculations. The interaction of silver atoms is modelled by a tight-binding semiempirical interatomic potential proposed by Cleri and Rosato. The pair correlation functions and the pair analysis technique are used to reveal the structural transition in the process of solidification. It is shown that Ag nanoparticles evolve into different nanostructures under different cooling processes. At a cooling rate of 1.5625 × 1013Ks-1 the nanoparticles preserve an amorphous-like structure containing a large amount of 1551 and 1541pairs which correspond to icosahedral symmetry. For a lower cooling rate (1.5625 × 1012Ks-1), the nanoparticles transform into a crystal-like structure consisting mainly of 1421 and 1422 pairs which correspond to the face centred cubic and hexagonal close packed structures, respectively. The variations of the electronic density of states for the differently cooled nanoparticles are small, but in correspondence with the structural changes. © 2009 IOP Publishing Ltd.
Original languageAmerican English
JournalJournal of Physics Condensed Matter
DOIs
StatePublished - 8 Apr 2009

Fingerprint Dive into the research topics of 'Atomic and electronic structure transformations of silver nanoparticles under rapid cooling conditions'. Together they form a unique fingerprint.

  • Cite this