Atomic resolution force imaging through the static deflection of the cantilever in simultaneous Scanning Tunneling/Atomic Force Microscopy

Ozer H. O.

ULTRAMICROSCOPY, vol.196, pp.54-57, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 196
  • Publication Date: 2019
  • Doi Number: 10.1016/j.ultramic.2018.09.018
  • Journal Name: ULTRAMICROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.54-57
  • Istanbul Technical University Affiliated: Yes

Abstract

We report simultaneous Force -static deflection of the cantilever-, Force Gradient and Scanning Tunneling topography images of Si(111)(7 x 7) surface using an off-resonance small amplitude non-contact atomic force microscopy technique with improved force sensitivity. The signal-to-noise ratio of the fiber interferometer used to detect the deflections of the cantilever was improved by applying an RF-modulation into the diode laser, which suppresses the noise in the laser. The measured sensitivity of similar to 20 fm/root Hz allows us to obtain atom resolved images of the surface in static deflection of the cantilever, simultaneously with the other imaging channels.