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通过操纵体外刚性来提高Pt1Ag18纳米集群的线性和非线性光学特性
Chuanjun Zhou1,2,3,4, Hao Yuan2, Isabelle Russier-Antoine2
1School of Materials Science and Engineering and Centre for Atomic Engineering of Advanced Materials, Anhui University, Hefei, China.
Angewandte Chemie (International ed. in English)
|February 25, 2026
概括
研究人员通过修改表面连接体来设计银纳米集群,从而提高其光学性能. 这种联体设计策略可以改善线性和非线性光学响应,用于生物成像和光子学中的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 光学是什么?光学是什么?光学是什么?
背景情况:
- 保护接体的金属纳米集群表现出独特的光学特性.
- 了解连接体对非线性光学行为的影响至关重要.
研究的目的:
- 为了设计Pt1Ag18纳米集群的配体外.
- 调节线性和非线性光学反应,通过调整连接体外刚性和电子核心相互作用.
主要方法:
- 合成了Pt1Ag18纳米集群,具有不同的连接体替代 (1-adamantanethiol和2-fluorothiophenol).
- 使用秒激发 (700-1000 nm) 进行非线性光学测量.
- 使用TD-DFT计算来建立结构-财产关系.
主要成果:
- 增强了一光子吸收,光发光量子产量和两光子吸收,增加了2-基醇含量.
- 证明了对共振效应和连接体刚性的联合控制对多光子激发效率的影响.
- 通过对电离子诱导的硬化实现了增强的1和2光子发光.
结论:
- 建立了一个结构-属性关系,将连接接体的几何和电荷转移与非线性光学性能联系起来.
- 开发了一个可通用的策略来调整金属纳米集群中的光学反应.
- 在多光子生物成像和光子学中确定了潜在的应用.
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