Rattling modes and the intrinsic vibrational spectrum of beetle-type scanning tunneling microscopes

Miwa, J.A., MacLeod, J.M., Moffat, Antje, & McLean, A.B. (2003) Rattling modes and the intrinsic vibrational spectrum of beetle-type scanning tunneling microscopes. Ultramicroscopy, 98(1), pp. 43-49.

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Abstract

It is known that the vibrational spectra of beetle-type scanning tunneling microscopes with a total mass of ≈3–4 g contain extrinsic ‘rattling’ modes in the frequency range extending from 500 to 1700 Hz that interfere with image acquisition. These modes lie below the lowest calculated eigenfrequency of the beetle and it has been suggested that they arise from the inertial sliding of the beetle between surface asperities on the raceway. In this paper we describe some cross-coupling measurements that were performed on three home-built beetle-type STMs of two different designs. We provide evidence that suggests that for beetles with total masses of 12–15 g all the modes in the rattling range are intrinsic. This provides additional support for the notion that the vibrational properties of beetle-type scanning tunneling microscopes can be improved by increasing the contact pressure between the feet of the beetle and the raceway.

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7 citations in Web of Science®

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ID Code: 89949
Item Type: Journal Article
Refereed: Yes
Keywords: Scanning tunneling microscopy; Scanning probes; Inertial sliders; Vibrational properties; Surface physics
DOI: 10.1016/S0304-3991(03)00086-X
ISSN: 0304-3991
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2003 Elsevier B.V.
Deposited On: 04 Apr 2016 01:14
Last Modified: 04 Apr 2016 01:14

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