Melting mechanism in monolayers of flexible rod-shaped molecules

Flemming Yssing Hansen, H. Taub

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Abstract

The melting of butane and hexane monolayers adsorbed on a graphite basal-plane surface has been studied by molecular-dynamics simulations and experimentally by neutron diffraction. The simulation results are qualitatively consistent with the observed diffraction patterns and suggest a general mechanism for melting in monolayers of flexible rod-shaped molecules. Melting requires the formation of vacancies in the monolayer by molecular motion perpendicular to the surface. This ‘‘footprint reduction’’ mechanism implies that strictly two-dimensional theories of melting are inapplicable to these systems.
Original languageEnglish
JournalPhysical Review Letters
Volume69
Issue number4
Pages (from-to)652-655
ISSN0031-9007
DOIs
Publication statusPublished - 1992

Bibliographical note

Copyright (1992) by the American Physical Society.

Keywords

  • TRANSITION
  • COMPUTER-SIMULATION
  • SYSTEM
  • XENON FILMS
  • ETHYLENE
  • GRAPHITE

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