Negative normal restitution coefficient found in simulation of nanocluster collisions

Kuniyasu Saitoh, Anna Bodrova, Hisao Hayakawa, Nikolai V. Brilliantov

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

The oblique impacts of nanoclusters are studied theoretically and by means of molecular dynamics. In simulations we explore two models-Lennard-Jones clusters and particles with covalently bonded atoms. In contrast with the case of macroscopic bodies, the standard definition of the normal restitution coefficient yields for this coefficient negative values for oblique collisions of nanoclusters. We explain this effect and propose a proper definition of the restitution coefficient which is always positive. We develop a theory of an oblique impact based on a continuum model of particles. A surprisingly good agreement between the macroscopic theory and simulations leads to the conclusion that macroscopic concepts of elasticity, bulk viscosity, and surface tension remain valid for nanoparticles of a few hundred atoms.

Original languageEnglish
Article number238001
JournalPhysical Review Letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2010 Nov 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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