アニゾトロピックLaPO4:Euナノクリスタルポリモルフの偏光
Elodie Chaudan1, Jongwook Kim1, Sandrine Tusseau-Nenez1
1Laboratoire de Physique de la Matière Condensée , Ecole Polytechnique, CNRS, Université Paris-Saclay , 91128 Palaiseau , France.
Journal of the American Chemical Society
|July 5, 2018
まとめ
ユーロピウムドーピングされたランタン酸ナノ結晶は,相変化の間に明確な発光極化変化を明らかにする. このスペクトル測定法では ナノ材料の構造変化を 感度が高く検出できます
科学分野:
- 材料科学
- スペクトロスコーピー
- ナノテクノロジー
背景:
- ランタニド元素は,の用途に価値のあるユニークなスペクトル特性を持っています.
- ランタニドイオンの光極化により,宿主物質の結晶相,対称性,および欠陥が明らかになる.
- この二極化特性はランタニドナノフォスファーの研究で十分に研究されていない.
研究 の 目的:
- ランタン酸化物 (LaPO4) のナノ結晶における相変異中のヨーロッパイオン (Eu3+) の発光の進化を調査する.
- ナノ材料の相変化を特徴づけるための敏感なツールとして,発光極化の可能性を探る.
主な方法:
- LaPO4のc軸に並べられたナノクリスタルアセンブリを使用した.
- 熱的に誘導された相変遷中のEu3+の放出極化を分析した.
- 構造分析のためのX線微分と光スペクトロスコピーの感度を比較した.
主要な成果:
- LaPO4ポリモルフの異なるサイト対称性に対応する Eu3+ 放出分極の有意な変化が観察されました.
- ナノ結晶の構造変化を正確に反映していることを示した.
- 構造的変化を検出するためのX線 difraktionと比較して,このスペクトル学的方法のより高い感度を示した.
結論:
- Eu3+の光極化は,LaPO4ナノ結晶の相変異と構造変化の敏感な指標として機能する.
- このアプローチは,ナノ材料の相変異を調査するための新しい,非常に敏感な方法論を提供します.
- ランタニドエミッターは,バイオイメージングとマイクロフリウジックにおける応用のための方向感知ナノプローブとして機能することができます.
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