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Volume 137, 2008
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Characterization of microparticles with driven optical tweezers

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We discuss how actively-driven optical tweezers may be used to characterize Brownian microparticles. Two experiments are described in detail. We follow the thermal fluctuations of a charged particle in an oscillatory electric field and demonstrate that charges as low as a few elementary charges can be measured accurately and reproducibly. Secondly, we measure the orientational dynamics of a trapped rotating droplet and use circular polarimetry within optical tweezers to determine in situ birefringence.

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Publication details

The article was received on 16 Mar 2007, accepted on 03 Apr 2007 and first published on 16 Jul 2007

Article type: Paper
DOI: 10.1039/B703994H
Citation: Faraday Discuss., 2008,137, 319-333
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    Characterization of microparticles with driven optical tweezers

    T. A. Wood, G. S. Roberts, S. Eaimkhong and P. Bartlett, Faraday Discuss., 2008, 137, 319
    DOI: 10.1039/B703994H

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