熱的に再構成可能なモノクリニックネマティックカロイド液体
Haridas Mundoor1, Jin-Sheng Wu2, Henricus H Wensink3
1Department of Physics, University of Colorado, Boulder, CO, USA.
Nature
|February 11, 2021
まとめ
研究者らは,ネマティック液晶の宿主の中で,充電されたコロイドディスクを使用して,新しい低対称性流体相を作成しました. この発見により 調節可能な自己組み立てが可能になり 高度な材料への応用が可能です
科学分野:
- 凝縮物質物理学
- コロイド科学
- 材料科学
背景:
- 基本的関係は,構成要素の対称性を凝縮物質の相と結びつける.
- 従来のシステムは,低対称性の流体状態を制限する相分離または強い順序をしばしば表します.
- 低対称性構造は以前は固体や特定の磁性コロイドに限定されていました.
研究 の 目的:
- 流体系における低対称性の凝縮物質相の形成を調査する.
- ネマティックな宿主におけるアニゾトロプ的コロイド粒子の自己集合を調査する.
- コロイドの自己組み立てと相行動に対する調整可能な制御を実証する.
主な方法:
- ネマティックな液晶の宿主の中で,高度にアニゾトロプの電荷を帯びたコロイドディスクを分散させる.
- システム的に温度,濃度,ディスク表面電荷を変化させる.
- ネマティック媒介内のコロイド相互作用を理解するために理論モデルを使用します.
主要な成果:
- ネマティック,スメクティック,コラムナー組織を含む多様な低対称性フェーズが,ユニアキシアル,オーソロンビック,およびモノクリニック対称性で観察されました.
- 異常な温度による変化を 発見した
- 再構成可能なモノクリン・コロイド・ネマティック・オーダーと自己組み立ての熱/磁気制御が実証されている.
結論:
- 低対称性の流体相を観察するための新しいプラットフォームは,ネマティックホストのコロイドディスクを使用して確立されました.
- この発見は,調節可能な性質を持つ多様な低対称性の凝縮物質相を実現するための経路を示唆している.
- 先進的な材料と自己組み立てプロセスにおける技術的な応用の可能性
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