非中心対称な円筒状ミセルは,一方的な成長による
Paul A Rupar1, Laurent Chabanne, Mitchell A Winnik
1School of Chemistry, University of Bristol, Bristol BS8 1TS, UK.
Science (New York, N.Y.)
|August 4, 2012
まとめ
研究者は,ブロックコポリマー (BCP) を使用して非中心対称なナノ粒子を作成するための新しい方法を開発しました. この技術は,円筒状のミセルの制御された成長を可能にし,ナノテクノロジーにおける潜在的な応用を持つ複雑な階層構造を形成します.
科学分野:
- マテリアルサイエンス 材料科学
- ポリマー化学のポリマー化学について
- ナノテクノロジー ナノテクノロジー
背景:
- ブロックコポリマー (BCP) の溶液自組成は,柔らかい物質ナノ粒子を作るための重要な方法である.
- BCPの自己組み立てにおける重要な課題は,形状アニソトロピーの非中心対称ナノ構造物の形成です.
研究 の 目的:
- 非中心対称,高アスペクト比,コロイド的に安定したコアシェルナノ粒子を合理的に作成するための方法を開発する.
- ナノ粒子の形状制御の限界を克服するために,以前は柔らかい物質の自己組み立てで見られました.
主な方法:
- 溶液中の結晶コイルBCPの結晶化駆動自己組み立てを採用した.
- 選択的なミセル・コロナ・クロスリンクを活用して,単分散型の円筒状の種子ミセルを作成しました.
- より長い円筒状の構造を形成するために,さらなるBCPを追加することによって,種子ミセルの単方向成長を達成しました.
主要な成果:
- 短く,単分散型の円筒状の種子ミセル (約. 130nm) で,一方的に成長する.
- 長い,非中心対称な円筒状のA-BとA-B-Cブロックコミセルを形成した.
- アンフィフィリックの円筒状のA-B-Cブロックコミセルの自己組み立てを,階層的な星状のスーパーミセル (approx. 3 μm) である.
結論:
- 記述された方法は,複雑で非中心対称なナノ粒子の合理的な設計と合成を可能にします.
- このアプローチにより,高アスペクト比,安定したコアシェルのナノ粒子を作り,生物学的構造を模倣することができます.
- この発見は,柔らかい物質からアニゾトロプ的ナノ構造を作り出す可能性を広げています.
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