Rapid, 3D Chemical Profiling of Individual Atmospheric Aerosols with Stimulated Raman Scattering Microscopy
Rapid, 3D Chemical Profiling of Individual Atmospheric Aerosols with Stimulated Raman Scattering Microscopy
复制标题
使用受激拉曼散射显微镜对单个大气气溶胶进行快速 3D 化学分析
DOI：
10.1002/smtd.201900600
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发表时间：
2019-12-11
期刊：
影响因子：
12.4
通讯作者：
Ji, Minbiao
中科院分区：
文献类型：
--
作者：
Ao, Jianpeng;Feng, Yiqing;Ji, Minbiao
可视化单个气溶胶的3D化学特征对于了解其形成和老化过程至关重要，但仍然具有技术挑战性。在这里，第一个应用程序的受激拉曼散射（SRS）显微镜上的3D化学成像的个人气溶胶在无损的方式证明。SRS能够以比传统的自发拉曼显微镜快四个数量级的速度绘制气溶胶的化学成分。硝酸盐和硫酸盐的空间分辨分布揭示了大气颗粒物的精细结构和不同的混合状态。此外，通过大面积成像和统计分析实现了化学成分和粒度分布的高通量定量。它的高速和3D化学定量能力使SRS显微镜成为研究单个大气颗粒特性及其对气候和人类健康影响的独特工具。
Visualizing the 3D chemical profiles of individual aerosols is crucial to understand their formation and aging processes, yet remains technically challenging. Here, the first application of stimulated Raman scattering (SRS) microscopy on 3D chemical imaging of individual aerosols in a nondestructive manner is demonstrated. SRS is capable of mapping chemical components of aerosols at a speed four orders of magnitude faster than conventional spontaneous Raman microscopy. Spatially resolved distributions of nitrates and sulfates reveal the fine structures and different mixing states of atmospheric particles. Moreover, high-throughput quantifications of chemical compositions and particle size distributions are realized by large-area imaging and statistical analysis. Its high-speed and 3D chemical quantification capabilities promise SRS microscopy as a unique tool for studying the properties of single atmospheric particles, and ultimately their impacts on climate and human health.