Enhanced higher-harmonic imaging in tapping-mode atomic force microscopy


Balantekin M. , Atalar A.

APPLIED PHYSICS LETTERS, vol.87, no.24, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 87 Issue: 24
  • Publication Date: 2005
  • Doi Number: 10.1063/1.2147708
  • Title of Journal : APPLIED PHYSICS LETTERS

Abstract

Higher-harmonics generation in a tapping-mode atomic force microscope is a consequence of the nonlinear tip-sample interaction force. The higher harmonics contain important information about the materials' nanomechanical properties. These harmonics can be significantly enhanced by driving the cantilever close to a submultiple of its resonant frequency. We present the results of enhanced higher-harmonic imaging experiments on several samples. The results indicate that enhanced higher harmonics can be utilized effectively for both material characterization and surface roughness analysis with a high signal-to-noise ratio.