Srivastava Anoop Kumar, Kim Miyoung, Kim Sung Min, Kim Mi-Kyung, Lee Kyu, Lee Young Hee, Lee Myong-Hoon, Lee Seung Hee
Polymer Fusion Research Center, Department of Polymer-Nano Science and Engineering, Chonbuk National University, Chonju, Chonbuk 561-756, Korea.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Nov;80(5 Pt 1):051702. doi: 10.1103/PhysRevE.80.051702. Epub 2009 Nov 16.
This research focuses on the electrokinetic motion of fullerenes suspended in liquid crystal host medium, which are investigated in the homogeneously aligned nematic liquid crystal cells driven by in-plane field. We investigated the effect of electrophoretic and dielectrophoretic forces and related parameters of the colloidal fullerenes in liquid crystals. The electrophoretic mobility, zeta potential, and critical voltage have been evaluated. Fullerenes suspended in liquid crystal medium migrated toward the positive electrode, but were pulled back in the opposite direction when the polarity was reversed especially at low frequency range (<5 Hz) . At higher electric field and higher frequency ranges, the net displacement of fullerenes has been observed. We demonstrate that the dielectrophoretic force dominated the motion in the colloidal fullerenes by a proper analysis of different electrophoretic parameters. In addition, the electrodynamics of fullerenes was explained by applying the theory of the dielectrophoresis and Schwarz's formula. We propose a model to estimate the density of fullerenes suspended in liquid crystal medium.
本研究聚焦于悬浮在液晶主体介质中的富勒烯的电动运动，这些富勒烯在由面内电场驱动的均匀排列向列相液晶盒中进行研究。我们研究了电泳力和介电泳力以及液晶中胶体富勒烯的相关参数的影响。评估了电泳迁移率、zeta电位和临界电压。悬浮在液晶介质中的富勒烯向正极迁移，但当极性反转时，尤其是在低频范围（<5Hz），它们会被拉向相反方向。在更高电场和更高频率范围内，观察到了富勒烯的净位移。通过对不同电泳参数的适当分析，我们证明介电泳力主导了胶体富勒烯中的运动。此外，通过应用介电泳理论和施瓦茨公式解释了富勒烯的电动力学。我们提出了一个模型来估计悬浮在液晶介质中的富勒烯的密度。
