| Lorentz force actuation of a heated atomic force microscope cantilever. | |
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MedLine Citation:
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PMID: 22237044 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We report Lorentz force-induced actuation of a silicon microcantilever having an integrated resistive heater. Oscillating current through the cantilever interacts with the magnetic field around a NdFeB permanent magnet and induces a Lorentz force that deflects the cantilever. The same current induces cantilever heating. With AC currents as low as 0.2 mA, the cantilever can be oscillated as much as 80 nm at resonance with a DC temperature rise of less than 5 °C. By comparison, the AC temperature variation leads to a thermomechanical oscillation that is about 1000 times smaller than the Lorentz deflection at the cantilever resonance. The cantilever position in the nonuniform magnetic field affects the Lorentz force-induced deflection, with the magnetic field parallel to the cantilever having the largest effect on cantilever actuation. We demonstrate how the cantilever actuation can be used for imaging, and for measuring the local material softening temperature by sensing the contact resonance shift. |
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Authors:
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Byeonghee Lee; Craig B Prater; William P King |
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Publication Detail:
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Type: Journal Article Date: 2012-01-11 |
Journal Detail:
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Title: Nanotechnology Volume: 23 ISSN: 1361-6528 ISO Abbreviation: Nanotechnology Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-01-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: England |
Other Details:
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Languages: eng Pagination: 055709 Citation Subset: IM |
Affiliation:
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Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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