注意：一种用于在线研究气溶胶表面的组合式空气动力学透镜/环境压力X射线光电子能谱实验。
Note: A combined aerodynamic lens/ambient pressure x-ray photoelectron spectroscopy experiment for the on-stream investigation of aerosol surfaces.
作者信息
Mysak Erin R, Starr David E, Wilson Kevin R, Bluhm Hendrik
机构信息
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
出版信息
Rev Sci Instrum. 2010 Jan;81(1):016106. doi: 10.1063/1.3276714.
We discuss a new approach for the measurement of the surfaces of free aerosol particles with diameters from 50 to 1000 nm. Particles in this size range have significant influence on the heterogeneous chemistry in the atmosphere and affect human health. Interfacing an aerodynamic lens to an ambient pressure x-ray photoelectron spectrometer permits measurement of the surface chemical composition of unsupported aerosol particles in real time. We discuss the basic considerations for the design of such an instrument, its current limitations and potentials for improvement. Results from a proof-of-principle experiment on silicon oxide particles with average diameters of 270 nm are shown.
我们讨论了一种测量直径为50至1000纳米的游离气溶胶颗粒表面的新方法。这个尺寸范围内的颗粒对大气中的非均相化学有重大影响，并会影响人类健康。将空气动力学透镜与常压X射线光电子能谱仪连接，可实时测量无支撑气溶胶颗粒的表面化学成分。我们讨论了设计此类仪器的基本考虑因素、其当前的局限性以及改进的潜力。展示了对平均直径为270纳米的氧化硅颗粒进行的原理验证实验的结果。
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