競争する弾性および静電相互作用によるトリクリニックネマティックカロイド結晶
Haridas Mundoor1, Bohdan Senyuk1, Ivan I Smalyukh2
1Department of Physics and Soft Materials Research Center, University of Colorado, Boulder, CO 80309, USA.
Science (New York, N.Y.)
|April 2, 2016
まとめ
研究者はナノ粒子の自己アセンブリを誘導することで 低対称性の大規模なコロイド結晶を作り出しました この画期的な発見により 高度な材料設計のための 結晶構造の正確な制御が可能になりました
科学分野:
- 材料科学
- 凝縮物質物理学
- コロイド科学
背景:
- ナノ粒子の自己組み立ては デザイナーの複合材料を作るための鍵です
- ナノ粒子で原子結晶の構造的複雑さを達成することは困難です.
- ナノ粒子配列の制御は 大きな課題です
研究 の 目的:
- コロイド結晶における多様な構造的順序の達成のための方法を開発する.
- 弾性および静電相互作用がナノ粒子の自己組み立てに及ぼす影響の組み合わせを調査する.
- 予測可能な構造を持つ 大規模な低対称性コロイド結晶を作る
主な方法:
- アニソトロピックな弾性と弱くスクリーニングされた静電相互作用を用いる.
- ナノ粒子の自己整理を 直接するために ネマティック・フリッド・ホストを使用する.
- コロイド対と多体相互作用を調査する.
- ナノ結晶の向きを ネマティックホストの位置に合わせる
主要な成果:
- 非有機ナノ結晶の方向的および三臨床的位置的自己秩序を達成した.
- ナノ粒子のサイズよりはるかに大きい格子周期を持つ低対称性コロイド結晶を生成します.
- ナノ結晶と結晶の向きが ネマティックホストの配列と結びついていることを実証した.
- 半導体ナノ棒を配合したトリクリニック結晶の出現を観察した.
結論:
- 結合されたアニゾトロピック力はナノ粒子の自己組み立てを 複雑な構造に効果的に導く.
- ネマティック流体ホストは,コロイド結晶形成を制御するためのスケーラブルな方法を提供します.
- このアプローチは,事前に設計された,低対称性の結晶構造を持つ材料を設計するための経路を提供します.
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