Computational model for noncontact atomic force microscopy: Energy dissipation of cantilever

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Yamaguchi University

Abstract

We propose a computational model for noncontact atomic force microscopy (AFM) in which the atomic force between the cantilever tip and the surface is calculated using a molecular dynamics method, and the macroscopic motion of the cantilever is modeled by an oscillating spring. The movement of atoms in the tip and surface is connected with the oscillating spring using a recently developed coupling method. In this computational model, the oscillation energy is dissipated, as observed in AFM experiments. We attribute this dissipation to the hysteresis and nonconservative properties of the interatomic force that acts between the atoms in the tip and sample surface. The dissipation rate strongly depends on the parameters used in the computational model.

Details

Original languageEnglish
Article number375001
Pages (from-to)1-10
Number of pages10
JournalJournal of physics: Condensed matter
Volume28
Issue number37
Publication statusPublished - 15 Jul 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • atomic force microscopy, energy dissipation, molecular dynamics method

ID: 6808052