Er3+/Tm3+ 协同激活的核心@shell纳米架构:可调节升级的转换发光和高安全性防伪
Xuan Liu1, Xiaojia Su1, Zhuohang Ren1
1College of Science, Nanjing Forestry University, Nanjing 210037, Jiangsu, China.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|October 23, 2023
概括
使用化物合纳米颗粒的先进光电子材料提供光学安全解决方案. 核心外纳米晶体显示多色和近红外上转换发光,用于防伪应用.
科学领域:
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
- 纳米技术 纳米技术
背景情况:
- 开发先进的光电子材料对于打击假冒产品至关重要.
- 用兰化物合的纳米材料在光学安全方面表现有前途,但在从单个激发源实现多个上转换排放方面存在局限性.
研究的目的:
- 为先进的防伪应用设计和合成能够产生多次上转化排放的核心外纳米晶体.
- 通过受控的激发和环境条件来证明发光性质的可调性.
主要方法:
- 合成立方相NaYbF4:Tm/Er@CaF2纳米晶体,采用层次共降的策略.
- 在980nm激光激发下,上转换发光特性的表征.
- 通过调整激光功率和温度来研究发光调节.
主要成果:
- 成功合成了NaYbF4:Tm/Er@CaF2核心外纳米晶体,呈现多色可见和不可见近红外上升转换发光.
- 证明可以通过调节激光功率和温度来控制发光输出.
- 通过广泛的光谱区域观察到的发光,适合光学安全.
结论:
- 在设计的核心外纳米架构中,与Tm3+和Er3+激活器的协同兴奋剂使多个发光辐射成为可能.
- 开发的升级转化纳米粒子是先进的防伪技术的有希望的候选者.
- 这项研究为开发用于实际光学安全应用的光电子材料提供了宝贵的参考.
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