Measurement of interparticle force between nematic colloids

Yasuyuki Kimura; Kuniyoshi Izaki

doi:10.1117/12.2064322

16 September 2014 Measurement of interparticle force between nematic colloids

Yasuyuki Kimura, Kuniyoshi Izaki

Proceedings Volume 9164, Optical Trapping and Optical Micromanipulation XI; 91640O (2014) https://doi.org/10.1117/12.2064322
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

Micro-sized colloidal particles dispersed in nematic liquid crystal become topological defects in uniform orientation of liquid crystal. Since they increase the elastic energy of the liquid crystal, a long-ranged anisotropic interaction is induced between them. In this study, we reported the interparticle force measured by various methods utilizing optical tweezers. The interparticle force depends on the type of particle-defect pair and its dependence on the interparticle distance is in agreement with the theoretical prediction using electrostatic analogy. This anisotropic force enables us to construct characteristic clusters, which cannot be realized in conventional water-based colloidal dispersions. We made some novel colloidal assemblies in two dimensions by utilizing optical tweezers to demonstrate the availability of the anisotropic force in nematic colloids

Citation Download Citation

Yasuyuki Kimura and Kuniyoshi Izaki "Measurement of interparticle force between nematic colloids", Proc. SPIE 9164, Optical Trapping and Optical Micromanipulation XI, 91640O (16 September 2014); https://doi.org/10.1117/12.2064322

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