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イワシタ ヤスタカ
IWASHITA Yasutaka
岩下 靖孝 所属 京都産業大学 理学部 物理科学科 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2010/08 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Dependence of interparticle force on temperature and cell thickness in nematic colloids |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW E |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 82(2),pp.020701 |
| 著者・共著者 | Noboru Kondo,Yasutaka Iwashita,Yasuyuki Kimura |
| 概要 | We have experimentally studied the interparticle force between two particles accompanied by hyperbolic hedgehog defects in a nematic liquid crystal. The force F was measured with dual-beam optical tweezers at various temperatures and in cells with various thicknesses. In a thick cell, the dependence of F on the interparticle distance R obtained at different temperatures can be scaled to a universal curve of F alpha R(-4) for R>3a, where a is the radius of a particle. The effective elastic constant evaluated from F is found to be in good agreement with splay constant of the nematic liquid crystal. In a thin cell, the magnitude of F decreases and the dependence of F on R becomes short-ranged as the thickness of a cell, L, decreases. The reduced force curves, FL(4) against R/L, at different L are found to be scaled to a single theoretical curve which has been proposed recently. |
| DOI | 10.1103/PhysRevE.82.020701 |
| ISSN | 1539-3755 |
| PMID | 20866767 |