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  • Title: Light-driven oscillations of entangled nematic colloidal chains.
    Author: Gomilšek M, Seč D, Skarabot M, Ravnik M, Zumer S, Muševič I.
    Journal: Eur Phys J E Soft Matter; 2010 Dec; 33(4):291-6. PubMed ID: 21057972.
    Abstract:
    Laser tweezers have been used to drive the oscillations of a chain of entangled colloidal particles in the nematic liquid crystal 5CB. The amplitude and phase of light-driven oscillations have been determined for the motion of individual colloidal particles. The collective motion of 4.8μm silica particles is highly damped for a driving frequency above 0.5Hz. The results were compared to an effective bead-spring model, where the motion of elastically coupled particles is hindered by viscous damping and hydrodynamic coupling. Qualitative agreement between theory and experiment was obtained.
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