ポラライゼーション制御コヒーレントラーマン顕微鏡によるポリマー鎖の3D指向イメージング
Shuyu Xu1, Ying Jin1, Young Jong Lee1
1Biosystems and Biomaterials Division, National Institute of Standards and Technology, Gaithersburg, Maryland20899, United States.
Journal of the American Chemical Society
|December 8, 2022
まとめ
研究者はアニゾトロプ的物質の 3D 分子配列を視覚化するための新しい顕微鏡技術を開発しました この方法により,これまで観察できなかったポリマー鎖の方向性が明らかになり,材料科学は進歩しました.
科学分野:
- 材料科学
- 化学物理学
- 顕微鏡検査
背景:
- 従来の2D偏振画像は,アニゾトロプ的材料の3D分子配列を捕捉することができません.
- 3D分子指向を理解することは 複雑な合成物質や生物学的物質を特徴づけるのに不可欠です
研究 の 目的:
- サブマイクロメートルの解像度で3D分子指向をイメージする新しい顕微鏡技術を開発し,実証する.
- 環帯状球体内のポリエチレン (PE) 鎖の3D分子配列を調査する.
主な方法:
- 偏振制御されたコヘラン抗ストークス・ラーマン散射 (CARS) 顕微鏡を用いた.
- ハイパースペクトルラマンデータを3D方向画像に変換した.
- ポリマー鎖の3D角度と順序のパラメータを定量化した.
主要な成果:
- ポリエチレンフィルムの3Dの角度を 視覚化しました
- PE鎖のアジムタル角が結晶の成長方向に垂直であることを観察した.
- リングバンドに同期しない角度で 限られた範囲の振動を検知し 既存の結晶成長モデルに挑戦しました
結論:
- 新しいCARS顕微鏡技術は,3D分子指向の高解像度,ラベルフリー,定量的イメージングを提供します.
- この発見は 完全に歪んだラメルの 結晶の成長モデルに 異議を唱えています
- この方法は,様々な材料の顕微鏡構造を分析する標準的なツールになる可能性があります.
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