Periodic oscillation of a colloidal disk near a wall in an optical trap

Zhengdong Cheng, Thomas G. Mason, P. M. Chaikin

    Research output: Contribution to journalArticlepeer-review


    The stable trapping of colloidal disks based on the use of optical tweezers was investigated. The study analyzed the periodic oscillation of a colloidal disk near an optical trap's wall. An instability in the periodic motion was observed when the tweezers pressed the disk against the opposing wall. The resultant 'switchback' oscillations constituted of combined orientational and translational motion of the disk. The observation indicated towards a new degree of freedom in colloidal architectures, that was, the capability of driving translational motion from a static light field energy source.

    Original languageEnglish (US)
    Article number051404
    Pages (from-to)514041-514045
    Number of pages5
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Issue number5 1
    StatePublished - Nov 2003

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Statistics and Probability
    • Condensed Matter Physics


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