ハイブリッド分子コロイド液晶
Haridas Mundoor1, Sungoh Park1, Bohdan Senyuk1
1Department of Physics and Soft Materials Research Center, University of Colorado, Boulder, CO 80309, USA.
Science (New York, N.Y.)
|May 19, 2018
まとめ
研究者らは,無機のコロイド棒と分子液晶を組み合わせて,新しいオーソロンビックネマティック液体を作りました. このハイブリッド素材は 独特の特性を持ち 外部フィールドで制御できます
科学分野:
- 柔らかい物質の物理
- 材料科学
- コロイド科学
背景:
- 秩序と流動性は 生物の膜や液晶のようなシステムで共存しています
- 柔らかい物質のシステムは 構成要素よりも高い対称性を表します
- ネマティック液晶は棒状の分子の方向順に特徴付けられています.
研究 の 目的:
- コロイドと分子棒から成るハイブリッド流体の自己組み立てと相性を調査する.
- 異性粒子の混合物における新しい秩序化された相の形成を調査する.
- 流体系の棒のような構成要素の 相互作用を理解する
主な方法:
- ネマティックな液体結晶液中のマイクロメートルの長さの無機コロイド棒の分散.
- 段階形成と構造的特徴の実験的観測
- 観察された相図と方向分布を説明するための粗粒型モデルの開発.
主要な成果:
- 相互作用する単軸コロイドと分子棒からオーソロンビックネマティック液体の形成.
- 実験温度-濃度相図で1つの二軸および2つの単軸ネマティック相の識別.
- ハイブリッド液体は双軸光学結晶の性質を示し,電気と磁場によって切り替えることができる.
結論:
- ハイブリッド分子コロイド液体は,その構成要素とは異なる対称性を持つユニークな秩序化された相を示すことができる.
- 開発された粗粒型モデルは,相行動と方向順序を正確に予測します.
- これらの調節可能なハイブリッド材料は,光学および応答性材料の応用の可能性を持っています.
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