Skip to main content
Article thumbnail
Location of Repository

Drive-amplitude-modulation atomic force microscopy: From vacuum to liquids

By Miriam Jaafar, David Martínez-Martín, Mariano Cuenca, John Melcher, Arvind Raman and Julio Gómez-Herrero

Abstract

We introduce drive-amplitude-modulation atomic force microscopy as a dynamic mode with outstanding performance in all environments from vacuum to liquids. As with frequency modulation, the new mode follows a feedback scheme with two nested loops: The first keeps the cantilever oscillation amplitude constant by regulating the driving force, and the second uses the driving force as the feedback variable for topography. Additionally, a phase-locked loop can be used as a parallel feedback allowing separation of the conservative and nonconservative interactions. We describe the basis of this mode and present some examples of its performance in three different environments. Drive-amplutide modulation is a very stable, intuitive and easy to use mode that is free of the feedback instability associated with the noncontact-to-contact transition that occurs in the frequency-modulation mode

Topics: Full Research Paper
Publisher: Beilstein-Institut
OAI identifier: oai:pubmedcentral.nih.gov:3343270
Provided by: PubMed Central
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://www.pubmedcentral.nih.g... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.