ナノチューブラータンパク質ジャケットの超パラマグネティックナノ粒子のマイクロメートルの長さの高完全性1D配列と,その横の磁気組成の振る舞いを調整する
Seunghyun Sim1,2, Daigo Miyajima1, Tatsuya Niwa3
1†RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Journal of the American Chemical Society
|April 1, 2015
まとめ
研究者は,ナノチューブ内の超パラ磁性酸化鉄ナノ粒子 (SNPs) のマイクロメートル長,一次元配列を作成しました. これらの自己組み立て構造は,磁場によって誘発された横の組み立てを示し,これは以前は予測された現象に過ぎなかった.
科学分野:
- 超分子化学 超分子化学
- ナノテクノロジー ナノテクノロジー
- バイオマテリアル科学 バイオマテリアル科学
背景:
- 超パラマグネット性鉄酸化物ナノ粒子 (SNP) は,制御された組み立ての可能性を提供します.
- GroELのようなチャペロニンタンパク質は,ナノ粒子の組織化のための支架を提供します.
- ナノ粒子の制御された1次元の (1D) 配列を達成することは依然として課題です.
研究 の 目的:
- 超分子ポリメリゼーションを使用して,SNPのマイクロメートルの長さの1D配列を調整する.
- SNPを含むナノ構造物の磁場誘発組成を調査する.
- ナノ粒子配列横向アセンブリの理論的予測を実験的に検証する.
主な方法:
- GroEL変異体 (GroELMC) がリガンド改変SNPで複合した超分子ポリメリゼーション.
- ナノチューブ形成のためのMg(2+) 媒介の調整結合を利用する.
- 1D SNP配列の横向アセンブリを誘導するために0.5Tの磁場を適用します.
主要な成果:
- 1D配列型SNP (NTGroELSNP) をカプセル化した,熱力学的に安定したマイクロメートルの長さのナノチューブの形成.
- 磁場下で NTGroELSNP ナノチューブを厚い 1D バンドルに横向に組み立てる観察.
- 磁場を除去した後に反転可能なバンドル分解の実証.
- 1D SNP配列の磁場誘発の横向アセンブリに関する概念の実証実験.
結論:
- Mg(2+) を媒介する超分子ポリメリゼーションは,ナノチューブ内の1D SNP配列の正確な調整を可能にします.
- 磁場は,これらの1Dナノ構造物の横向の組み立てを制御的に誘導することができます.
- この研究は,1Dナノ粒子配列の横向アセンブリに関する最初の実験的証拠を提供します.
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