- Title
- Collocated Z-axis control of a high-speed nanopositioner for video-rate atomic force microscopy
- Creator
- Yong, Yuen Kuan; Moheimani, S. O. Reza
- Relation
- IEEE Transactions on Nanotechnology Vol. 14, Issue 2, p. 338-345
- Publisher Link
- http://dx.doi.org/10.1109/TNANO.2015.2394327
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2015
- Description
- A key hurdle to achieve video-rate atomic force microscopy (AFM) in constant-force contact mode is the inadequate bandwidth of the vertical feedback control loop. This paper describes techniques used to increase the vertical tracking bandwidth of a nanopositioner to a level that is sufficient for video-rate AFM. These techniques involve the combination of: a high-speed XYZ nanopositioner; a passive damping technique that cancels the inertial forces of the Z actuator which in turns eliminates the low 20-kHz vertical resonant mode of the nanopositioner; an active control technique that is used to augment damping to high vertical resonant modes at 60 kHz and above. The implementation of these techniques allows a tenfold increase in the vertical tracking bandwidth, from 2.3 (without damping) to 28.1 kHz. This allows high-quality, video-rate AFM images to be captured at 10 frames/s without noticeable artifacts associated with vibrations and insufficient vertical tracking bandwidth.
- Subject
- atomic force microscopy; constant-force; flexure; nanpositioning; video-rate
- Identifier
- http://hdl.handle.net/1959.13/1319817
- Identifier
- uon:23976
- Identifier
- ISSN:1536-125X
- Rights
- © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
- Language
- eng
- Full Text
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