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Nonlinear detection of ultrasonic vibration of AFM cantilevers in and out of contact with the sample.

Kolosov, Oleg and Briggs, G. A. D. and Cuberes, M. T. (2001) Nonlinear detection of ultrasonic vibration of AFM cantilevers in and out of contact with the sample. Nanotechnology, 12 (1). pp. 53-59. ISSN 0957-4484

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Abstract

Ultrasonic vibration can be nonlinearly detected by means of an atomic force microscopy cantilever when the tip is in contact with a sample surface owing to the so-called (sample-induced) ultrasonic force. The procedure has been developed as a novel technique, ultrasonic force microscopy (UFM), that provides information about the nanoscale elastic and adhesive properties of surfaces. Here, we compare differences in the UFM signal when ultrasound is excited from the back of the sample (sample UFM) and from the cantilever base (waveguide UFM). UFM relies on the nonlinear ultrasound-induced cantilever displacement (due to the aforementioned ultrasonic force), and does not monitor the linear high-frequency vibration of the cantilever. In this paper, we discuss the influence of a linear high-frequency cantilever response in the UFM measurements and provide experimental evidence of the feasibility of nonlinearly detecting the free ultrasonic cantilever vibration when the tip is out of contact with the sample surface using the typical laser-beam deflection method for monitoring cantilever displacements.

Item Type: Article
Journal or Publication Title: Nanotechnology
Additional Information: A new way of delivering ultrasonic vibration via AFM cantilever was developed leading to the effective realization of the contact and non-contact detection of short time scale (microsecond to sub-nanosecond) physical phenomena in scanned probe microscopy. RAE_import_type : Journal article RAE_uoa_type : Physics
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 2294
Deposited By: ep_importer
Deposited On: 03 Apr 2008 16:55
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:08
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/2294

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