频域低波数高光谱刺激拉曼散射显微镜
Matthew G Clark1, Karsten J Mohn1, Bin Dong1,2
1Department of Chemistry, Purdue University; 560 Oval Dr., West Lafayette, Indiana 47907, United States.
Analytical chemistry
|June 12, 2024
概括
频域高光谱刺激拉曼散射 (hSRS) 显微镜现在可以检测低波数振动低于100厘米-1. 这一进步改善了对较弱的振动能量的化学成像,具有较高的散射容忍度.
科学领域:
- 化学成像技术 化学成像技术
- 频谱学是一种光谱学.
- 显微镜的使用方法
背景情况:
- 刺激拉曼散射 (SRS) 显微镜对于化学分析至关重要.
- 超光谱SRS (hSRS) 显微镜通过像素特定的拉曼光谱增强化学选择性.
- 目前的频域hSRS显微镜在生物应用中表现出色,但仅限于400-4000 cm-1 ,缺少较弱的振动能量.
研究的目的:
- 将频域hSRS显微镜的光谱覆盖范围扩展到低波数 (<100 cm-1).
- 为了能够使用hSRS显微镜检测较弱的振动能量.
- 为了提高光谱域SRS显微镜的化学成像能力.
主要方法:
- 使用皮秒光谱聚焦hSRS显微镜.
- 扩展了频域 hSRS 方法来测量低于 100 cm-1 的拉曼过渡.
- 实现了从100-4000厘米-1的广泛光谱覆盖.
主要成果:
- 成功使用扩展频域hSRS显微镜检测低波数拉曼过渡 (<100 cm-1).
- 在扩展的光谱范围中对样本散射有很高的耐受性.
- 能够测量以前常规频域hSRS无法获得的较弱的振动能量.
结论:
- 开发的低波数频域hSRS显微镜扩大了用于增强化学成像的光谱覆盖范围.
- 这种技术为分析具有弱振信号和高分散度的样品提供了强大的解决方案.
- 这一进步扩大了SRS显微镜在化学分析中的应用范围.
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