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采样子衍射温度梯度与光谱直角纳米粒子发光.

Benjamin Harrington1, Qiwen Xiao1, Junyi Lin2

  • 1Materials Science Program, University of Rochester, Rochester, New York 14627, United States.

ACS photonics
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的光学温度计方法,使用光谱上不同的纳米颗粒来测量射极限以下多个点的温度梯度.

关键词:
光光谱学光发光谱学发光温度测量仪的发光度纳米热度测量 (nanothermometry) 是一种方法.热计量学 热计量学通过将纳米颗粒转化为上方的纳米粒子.

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科学领域:

  • 纳米技术纳米技术
  • 光学物理学 光学物理学
  • 材料科学 材料科学 材料科学

背景情况:

  • 使用单个纳米粒子的光学温度计提供了亚衍射空间分辨率,但仅限于单点测量.
  • 探测温度梯度需要多点测量,这与传统方法具有挑战性.

研究的目的:

  • 开发一种多点光学温度计技术,能够解决亚衍射区域内的温度梯度.
  • 利用不同纳米粒子物种的光谱直角发光来同时传感温度.

主要方法:

  • 采用了合兰他尼德的上转化纳米粒子 (UCNPs),具有光谱上独特的,取决于温度的发光 (NaYF4:Yb3+,Er3+和NaYF4:Yb3+,Tm3+).
  • 使用单个激光同时激发两个UCNP类型,获得它们的单独发光光谱.
  • 验证了使用双联UCNP对的方法,并将结果与单个UCNP测量结果进行了比较.

主要成果:

  • 成功地证明了从两个不同的UCNP类型中同时获得光谱上不同的发光.
  • 在协同UCNP对测量和单独UCNP测量之间取得了很好的一致性.
  • 解决了两个UCNP之间~19K的温度差异,距离~108nm,尽管有重叠的衍射受限发射点.

结论:

  • 这种方法可以在子衍射区域内绘制多点温度梯度映射.
  • 该技术对于需要局部温度测量而不会阻碍样品表面的应用非常有价值,例如在催化剂中.