Robust Superlubricity of Gold–Graphite Heterointerfaces

Rotem Yaniv, Elad Koren

Research output: Contribution to journalArticlepeer-review

Abstract

Noncommensurate 2D interfaces hold great promise toward low friction and nanoelectromechanical applications. For identical constituents, the crystals interlock at specific rotational configurations leading to high barriers for slide. In contrast, nonidentical constituents comprising different lattice parameters should enable robust superlubricity for all rotational configurations. This is however not the case for gold–graphite interfaces, as both theory and experiments show scaling behavior of the sliding force as a function of the interface contact area. By simulating the sliding force for gold–graphite interfaces, this work shows that the origin for high force barriers at special angular configurations is a result of commensurability between the moiré structure and the contact geometry. Consequently, this paper suggests new geometries that can potentially overcome such commensurability effects to enable robust superlubricity.

Original languageEnglish
Article number1901138
JournalAdvanced Functional Materials
Volume30
Issue number18
DOIs
StatePublished - 1 May 2020

Keywords

  • Moiré
  • commensurability
  • gold
  • graphite
  • superlubricity

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • General Materials Science

Fingerprint

Dive into the research topics of 'Robust Superlubricity of Gold–Graphite Heterointerfaces'. Together they form a unique fingerprint.

Cite this