Light-driven oscillations of entangled nematic colloidal chains |
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| Authors: | M.?Gomil?ek D.?Se? M.??karabot M.?Ravnik S.??umer I.?Mu?evi? |
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| Affiliation: | 1.Jo?ef Stefan Institute,Ljubljana,Slovenia;2.Faculty of Mathematics and Physics,University of Ljubljana,Ljubljana,Slovenia;3.Rudolf Peierls Centre for Theoretical Physics,University of Oxford,Oxford,UK |
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| 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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