超紫外線発光のスイッチ式制御のためのアップコンバージョンナノ粒子の刺激調節
Peter Dawson1, Marek Romanowski1
1Department of Biomedical Engineering , University of Arizona , Tucson , Arizona 85721 , United States.
Journal of the American Chemical Society
|April 18, 2018
まとめ
研究者は,最適化されたナトリウムイトリウムフッ素 (NaYF4) アップコンバージョンナノ粒子 (UNP) を使用して,紫外線 (UV) 発光に対するスイッチのような制御を実証した. この方法は,潜在的セラノスティックアプリケーションのための正確なUV強度調節を可能にします.
科学分野:
- 材料科学
- ナノテクノロジー
- 発光する
背景:
- アップコンバージョンナノ粒子 (UNP) は,さまざまな用途にユニークな光学特性を提供します.
- 特にUVスペクトルにおける発光強度を制御することは,高度な材料の機能に不可欠です.
- 稀土イオンでドーピングされたフッ化ナトリウムベースのUNPはエネルギー変換に有望です.
研究 の 目的:
- NaYF4:Yb3+,Tm3+アップコンバージョンナノ粒子 (UNP) の紫外線 (UV) 発光強度に対するスイッチのような制御を実証する.
- イッテルビウムドーピング濃度のUV発光に対する影響を調査する.
- 他の分子への紫外線エネルギー移転の応用を探求する.
主な方法:
- NaYF4:Yb3+,Tm3+ UNPでの980 nm刺激パルス幅調節 (PWM) を利用した.
- 紫外線を強めるため,イテルビウムドーピング濃度を最適化した.
- UNPから9,10-ディフェニラントラセン (DPA) への紫外線エネルギー転送を調査した.
主要な成果:
- 980nm刺激PWMを使用して,UV発光強度に対するスイッチのような制御を達成した.
- 優化されたイテルビウムドーピングは 紫外線を 1 度改善した
- 紫外線発光強度に対する3度程度の制御が示され,800nmでNIR放射が維持されています.
- 紫外線エネルギーを UNP から DPA に成功的に転送した.
結論:
- NIR刺激のパルス幅調節は,NaYF4:Yb3+,Tm3+ UNPからの紫外線発光に対して,スイッチのような正確な制御を提供します.
- オプティマイズされたUNPは 紫外線の放出と制御可能なエネルギー転送能力を有する.
- NIR発射と紫外線エネルギー転送の独立した制御は,多機能のセラノスティックシステムの可能性を開きます.
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