モザイクの2つの長さスケールの準結晶
T Dotera1, T Oshiro1, P Ziherl2
1Department of Physics, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan.
Nature
|February 4, 2014
まとめ
軟質の物質システムは,一般的な組み立てメカニズムを通じて準結晶を形成することができます. この研究は,特定の粒子の相互作用と局所的な幾何学が,柔らかい材料における準結晶の秩序をどのように駆動し,新しいアプリケーションを可能にするかを明らかにしています.
科学分野:
- ソフトマター物理学 ソフトマター物理学
- 材料科学 材料科学とは
- クリスタログラフィーです.
背景:
- 準結晶の秩序は,ミセルやポリマー溶液のような多様な軟質系において観察されている.
- 形成メカニズムは一般的なもので,特定の化学組成から独立していると考えられています.
- ミセラ軟さは,準結晶の秩序を誘発するために提案された重要な要因です.
研究 の 目的:
- 理論的にミセラ軟さと準結晶の秩序との関係を探求する.
- 軟質物質の準結晶形成における局所包装幾何学の役割を調査する.
- 自己組み立て型準結晶構造の潜在的応用を特定する.
主な方法:
- ステップ型の正方形の肩の反発を持つ二次元ハードディスクの理論モデリング.
- 柔らかいマクロ分子ミセルを模倣した粒子相互作用のシミュレーション.
- 結合指向順序の分析と,その結果生じる幾何学的なモザイク.
主要な成果:
- 10・12・18・24倍結合の指向順に準結晶相を特定した.
- 核対核と肩対肩の配置から等辺と等足の三角形のモザイクの形成が観察されました.
- 軟質物質の準結晶性を生成するために,局所包装の幾何学が不可欠であることを示した.
結論:
- 柔らかさと局所的な包装の幾何学は,柔らかい物質の準結晶形成に不可欠である.
- この発見は,硬体系における準結晶形成に関する既存の理論を補完するものである.
- 準結晶モザイクには,画像再現や光子材料などの分野で潜在的な応用があります.
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