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Updated: Jul 12, 2026
10:52
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
光照射による分子結晶の迅速かつ可逆的な形状変化
Seiya Kobatake1, Shizuka Takami, Hiroaki Muto
1Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan.
Nature
|April 13, 2007
まとめ
ダリエレチンの染色体を持つ分子結晶は,UVと可視光にさらされると,迅速で可逆的な形状変化を示します. これらの光に反応する材料は,潜在的光駆動アクチュエータの既存の技術に比べて,速度を大幅に改善します.
科学分野:
- マテリアルサイエンス 材料科学
- フォトケミストリー フォトケミストリー
- ナノテクノロジー ナノテクノロジー
背景:
- 刺激に反応する材料に基づくアクチュエータは,著しい関心を持っています.
- 光に反応する材料は,遠隔操作の能力を提供します.
- 既存のアゾベンゼンベースのシステムは,反応時間が遅い.
研究 の 目的:
- 分子結晶の急速かつ可逆のマクロスコプ的形状変化を調査する.
- ライト駆動アクチュエータとしてダイアリレチン染色体ベースの結晶の可能性を調査する.
主な方法:
- ディアリレチンの染色体を含む分子結晶 (10-100マイクロメートル) を利用した.
- 結晶を紫外線 (UV) と可視光にさらして,形状の変化を誘発し,逆転させる.
- 測定された応答時間と観測されたマクロスコピック変形.
主要な成果:
- 結晶は急速 (約. 25マイクロ秒) と,可逆的なマクロスコピック形状とサイズの変化.
- 特殊な結晶構造は,正方形からロゼンジ形に変形するか,または5-7%収縮した.
- 変形した結晶は熱的安定性を示し,可視光照射で再開した.
結論:
- ダリエレチン基の分子結晶は,アゾベンゼン系よりも著しく速い.
- これらの材料は,マクロスカプティックな変化を誘発し,顕微鏡の物体を移動させることができます.
- 結晶は,高度な光駆動アクチュエータアプリケーションの有望性を示しています.
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