远程激发尖端增强光发光与平行AGNW合器的远程激发
Wannes Peeters1, Shuichi Toyouchi1, Yasuhiko Fujita2
1Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Heverlee B-3001, Belgium.
ACS omega
|October 23, 2023
概括
远程激发尖端增强光发光 (RE-TEPL) 显微镜通过空间分离激发和检测来克服分辨率限制. 这种技术使得像MoSe2/WSe2异构结构这样的材料的纳米级光谱映射成为可能.
科学领域:
- 纳米尺度的光学显微镜.
- 频谱学是一种光谱学.
- 材料科学是一种材料科学.
背景情况:
- 尖端增强光发光 (TEPL) 显微镜与光发光谱相对应纳米尺度成像.
- 在TEPL中远场激发受到 difraktion-limited背景光的限制,阻碍了空间分辨率.
- 尖端增强拉曼散射 (TERS) 提供高分辨率,但散射截面低于光.
研究的目的:
- 为了克服传统的TEPL显微镜的空间分辨率限制.
- 开发一种方法,在纳米级光发光度测量中最大限度地减少背景光.
- 证明新技术在分析材料异质性的能力.
主要方法:
- 通过空间分离激发和检测,开发了远程激发TEPL (RE-TEPL).
- 评估了两个探测器设计:在银纳米线上的金纳米颗粒和两个偏移平行银纳米线.
- 利用模拟和实验验证来评估探头设计.
主要成果:
- 两个偏移平行银纳米线合器系统显示了更高的合效率.
- 成功地将RE-TEPL光谱映射应用到MoSe2/WSe2横向异构结构中.
- 揭示了在异质连接处的空间异质性,并增强了空间分辨率.
结论:
- RE-TEPL有效地减少了远场背景贡献,提高了光发光显微镜中的空间分辨率.
- 银纳米线合器系统是先进纳米级光学表征的有希望的设计.
- RE-TEPL为研究复杂材料系统中纳米尺度变异提供了强大的工具.
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