Light-driven oscillations of entangled nematic colloidal chains.
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.
Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
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Gomilšek
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Seč
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Skarabot
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Ravnik
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Zumer
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Muševič
D003102:Colloids / Q000737:chemistry / Q000528:radiation effects*; D004548:Elasticity; D057446:Hydrodynamics; D008027:Light; D050866:Liquid Crystals / Q000737:chemistry / Q000528:radiation effects*; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D014783:Viscosity
D003102:Colloids; D012822:Silicon Dioxide