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岩下 靖孝 所属 京都産業大学 理学部 物理科学科 職種 准教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2016/06 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Spatial confinement governs orientational order in patchy particles |
| 執筆形態 | その他 |
| 掲載誌名 | SCIENTIFIC REPORTS |
| 出版社・発行元 | NATURE PUBLISHING GROUP |
| 巻・号・頁 | 6,pp.27599 |
| 著者・共著者 | Yasutaka Iwashita,Yasuyuki Kimura |
| 概要 | Orientational order in condensed matter plays a key role in determining material properties such as ferromagnetism, viscoelasticity or birefringence. We studied purely orientational ordering in closely-packed one-patch colloidal particles confined between flat substrates, where the particles can only rotate and are ordered via the sticky interaction between the patches. For the first time, we experimentally realized a rich variety of mesoscopic patterns through orientational ordering of colloids by controlling patch size and confinement thickness. The combination of experiment and numerical simulation reveals the decisive role of confinement: An ordered state(s) is selected from the (meta) stable options in bulk when it is commensurate with the system geometry and boundary conditions; otherwise, frustration induces a unique order. Our study offers a new means of systematic control over mesoscopic structures via orientational ordering in patchy particles. The system would also possess unique functionalities through the rotational response of the particles to external stimuli. |
| DOI | 10.1038/srep27599 |
| ISSN | 2045-2322 |
| PMID | 27264521 |