Coalescence and collisions of gold nanoparticles

Joel Ant́unez-Garćia, Sergio Mej́ia-Rosales, Eduardo Ṕerez-Tijerina, Juan Mart́in Montejano-Carrizales, Miguel Jośe-Yacaḿan

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We study the assembling of small gold clusters subject to collisions and close contact coalescence by using molecular dynamics simulations to simulate events that occur typically in the sputtering process of synthesis. Our results support the notion that the kinetics of coalescence processes strongly determine the geometry and structure of the final particle. While impact velocities, relative orientations, and the initial shape of the interacting particles are unlikely to strictly determine the structural details of the newly formed particle, we found that high initial temperatures and/or impact velocities increase the probability of appearance of icosahedral-like structures, Wulff polyhedra are likely to be formed as a product of the interactions between nanospheres, while the appearance of fcc particles of approximately cuboctahedral shape is mainly due to the interaction between icosahedra.

Original languageEnglish (US)
Pages (from-to)368-379
Number of pages12
JournalMaterials
Volume4
Issue number2
DOIs
StatePublished - 2010
Externally publishedYes

Keywords

  • Coalescence
  • Collisions
  • Common neighbor analysis
  • Gold nanoparticles
  • Molecular dynamics

ASJC Scopus subject areas

  • Materials Science(all)

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