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Nonlinear Detection of Ultrasonic Vibrations in an Atomic Force Microscope

Kolosov, Oleg and Yamanaka, K (1993) Nonlinear Detection of Ultrasonic Vibrations in an Atomic Force Microscope. Japanese Journal of Applied Physics, 32 (8A). L1095-L1098. ISSN 0021-4922

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Abstract

A new method is proposed to detect ultrasonic vibration of the samples in the Atomic Force Microscope (AFM) using nonlinearity in the tip-sample interaction force curve F(z). Small amplitude ultrasonic vibration less than 0.2 nm is detected as an average displacement of a cantilever. This Ultrasonic Force Mode (UFM) of operation is advantageous in detecting ultrasonic vibration with frequencies up to the GHz range, using an AFM cantilever with a resonant frequency below 100 kHz. It was found that a strong repulsive force is acting after an ultrasonic amplitude threshold of the is crossed, with the amplitude of this threshold depending upon the average force applied to the tip.

Item Type: Article
Journal or Publication Title: Japanese Journal of Applied Physics
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57398
Deposited By: ep_importer_pure
Deposited On: 05 Oct 2012 15:23
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57398

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