流体オーソロンビック層の曲ったコアのスメクティック液晶の自発的な鉄電気的秩序

R Amaranatha Reddy¹, Chenhui Zhu, Renfan Shao

¹Department of Chemistry and Biochemistry, Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309-0215, USA.

Science (New York, N.Y.)

|April 2, 2011

まとめ

研究者らは,新しい鉄電性材料であるSmAP (F) を発見し,層状鉄電性材料の中で最も高い対称性を示した. この流動的な物質は,3Dの鉄電気状態へと変化し,結晶固体を超えた可能性が広がります.

科学分野:

マテリアルサイエンス材料科学
凝縮物質物理学凝縮物質物理学
クリスタルグラフィーです.

背景:

マクロスコープの極化によって特徴づけられるフェロ電力は,通常,流体相における弱まった分子間相互作用のために結晶体固体に限定されます.
層状の鉄電気材料は希少で,既存の例はしばしばより低い対称性を示すか,特定の結晶構造を必要とする.

研究の目的:

層状の鉄電学で可能な限り最も高い対称性を有する新しい鉄電学物質の発見と特徴を報告する.
流体スメクティック層における鉄電性を可能にする分子設計とオーダーリング原理を調査する.

主な方法:

曲ったコアの液晶材料,SmAPの合成と特徴付け (F).
単層の厚さの自由懸浮フィルムを分析して,平面内の極の順序を観察する.
立体的な鉄電構造を確認するための電気光学応答測定.

主要な成果:

SmAP ((F) の識別は, 3Dの鉄電気状態に自己組み立てられる極性オルソロンビック層を呈するスメクティック相である.
安定した層の内部で,ヒットされた分子と平面内の極性秩序の実証.
これまでに発見された最も対称性の高い層状の鉄電性物質の確認です.

結論:

単一の柔軟な尾とシラン結末を持つボントコア分子設計は,3Dの鉄電気オーソロンビック相の安定化に不可欠です.
SmAP (F) は,流動性と高い対称性のユニークな組み合わせを提供する,鉄電性材料の重要な進歩を表しています.
この発見は,伝統的な結晶構造を超えて,鉄電気材料の範囲を拡大します.

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