Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, People's Republic of China.
Centre for Photonics and Photonic Materials, Department of Physics, University of Bath , Claverton Down, Bath BA2 7AY, United Kingdom.
Environ Sci Technol. 2017 Jun 6;51(11):6260-6267. doi: 10.1021/acs.est.6b05910. Epub 2017 May 26.
A simple and rapid method for detecting chemical components of individual aerosol particles on Klarite substrate with surface-enhanced Raman spectroscopy (SERS) is described. For both single simulated aerosol particles and ambient atmospheric particles, this new analytical method promotes the enhancement factor of the Raman signal. The spectra of ammonium sulfate and naphthalene particles at the microscopic level are enhanced by a factor of 6 and therefore greatly improve the detection of the chemical composition of an individual aerosol particle. When aerosol particles are found over a microscopic domain, a set of Raman spectra with chemical information can be obtained via SERS mapping. The maps illustrate the distribution of organic or inorganic species on the SERS substrate. This constitutes a facile and rapid method to study aerosol particles. This new method allows the analysis of chemical composition in single aerosol particles, demonstrating the power of SERS to probe the ambient atmospheric particles and to study the formation of aerosol particles.
描述了一种在 Klarite 基底上利用表面增强拉曼光谱（SERS）检测单个气溶胶颗粒化学成分的简单、快速方法。对于单个模拟气溶胶颗粒和环境大气颗粒，这种新的分析方法提高了拉曼信号的增强因子。在微观水平上，硫酸铵和萘粒子的光谱增强了 6 倍，因此大大提高了单个气溶胶颗粒化学成分的检测能力。当在微观区域发现气溶胶颗粒时，可以通过 SERS 映射获得具有化学信息的一组拉曼光谱。图谱描绘了 SERS 基底上有机或无机物质的分布。这构成了一种研究气溶胶颗粒的简便快速方法。这种新方法允许对单个气溶胶颗粒中的化学成分进行分析，展示了 SERS 探测环境大气颗粒和研究气溶胶颗粒形成的能力。
