上转化纳米颗粒的激发调节,以开关式控制紫外线发光
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
概括
研究人员使用优化化 (NaYF4) 上转化纳米颗粒 (UNP) 证明了对紫外线 (UV) 发光的切换式控制. 这种方法可以精确调节紫外线强度,
科学领域:
- 材料科学
- 纳米技术
- 发光效应
背景情况:
- 上转化纳米粒子 (UNP) 为各种应用提供独特的光学特性.
- 控制发光强度,特别是在紫外线频谱中,对于先进的材料功能至关重要.
- 用稀土离子添加的基UNP对能量转化具有前景.
研究的目的:
- 在NaYF4:Yb3+,Tm3+上转化纳米颗粒 (UNP) 中证明了对紫外线 (UV) 发光强度的切换式控制.
- 为了研究聚对紫外线发光的影响.
- 探索紫外线能量转移到其他分子的应用.
主要方法:
- 使用980nm激发脉冲宽度调制 (PWM) 在NaYF4:Yb3+,Tm3+ UNPs上.
- 优化的注度以增强紫外线发光.
- 研究了从UNP到9,10-二甲烯 (DPA) 的紫外线能量传递.
主要成果:
- 使用980nm激发PWM实现了对紫外线发光强度的切换式控制.
- 优化的伊特补充剂使紫外线发光率提高了一级.
- 在800nm保持NIR发射时,证明了对UV发光强度的3级控制.
- 成功地将紫外线能量从UNP转移到DPA.
结论:
- NIR激发的脉冲宽度调节提供了对NaYF4:Yb3+,Tm3+UNP的紫外线发光的精确,类似开关的控制.
- 优化UNP显示增强的紫外线排放和可控制的能量传输能力.
- 独立控制NIR发射和紫外线能量转移为多功能光系统提供了可能性.
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