Propelling and spinning of microsheets in nematic liquid crystals driven by ac electric field
| Autor: | Surajit Dhara, M. V. Rasna, Rajadurai Chandrasekar, U. V. Ramudu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics Microfluidics Isotropy Homeotropic alignment Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Electrokinetic phenomena Liquid crystal Electric field 0103 physical sciences 010306 general physics 0210 nano-technology Anisotropy Spinning |
| Zdroj: | Physical review. E. 95(1-1) |
| ISSN: | 2470-0053 |
| Popis: | Dynamics of microparticles in isotropic liquids by transducing the energy of an applied electric field have been studied for decades. Recently, such studies in anisotropic media like liquid crystals have opened up new perspectives in colloid science. Here, we report studies on ac-electric-field-driven dynamics of microsheets in nematic liquid crystals. In planar aligned liquid crystals, with negative dielectric anisotropy, the microsheets are propelled parallel to the director. A steady spinning of the microsheets is observed in homeotropic cells with positive dielectric anisotropy liquid crystals. The velocity of propelling and the angular frequency of spinning depends on the amplitude and the frequency of the applied electric field. The electrokinetic studies of anisotropic microparticles are important as they are potential for applications in microfluidics and in areas where the controlled transport or rotation is required. |
| Databáze: | OpenAIRE |
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