在单个纳米粒子中对液态-固态相变的等离子反应
Michal Horák1, Michael Foltýn1, Vojtěch Čalkovský1,2
1Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno 612 00, Czech Republic.
The journal of physical chemistry letters
|August 21, 2025
概括
纳米粒子
科学领域:
- 塑制剂
- 纳米材料
- 物理化学
背景情况:
- 纳米粒子在UV-Vis-NIR光谱中表现出可调节的等离子特性.
- 的独特的相变行为为新的应用提供了机会.
研究的目的:
- 研究液态到固态相变对纳米粒子等离子体的影响.
- 用先进的显微镜分析单个粒子水平上的等离子特性变化.
主要方法:
- 使用分析传输电子显微镜 (TEM).
- 单个纳米粒子在各种冷温度下进行了研究.
主要成果:
- 观察到液体到β-相转变,冷点在-135°C,点在-20°C.
- 通过尺寸定位的表面等离子体共振 (LSPR) 调整从紫外线到可见.
- 在液体和固体纳米粒子之间发现了LSPR能量的微小差异.
结论:
- 在温度依赖的等离子学研究中,纳米粒子的性能不受相变的影响.
- 这些发现支持使用纳米颗粒来抑制冷表面增强拉曼光谱 (SERS) 的非辐射重组.
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