Nanoparticle Detection by Aerosol Mass Spectrometry
Nanoparticle Detection by Aerosol Mass Spectrometry
复制标题
气溶胶质谱法检测纳米粒子
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Johnston
中科院分区：
文献类型：
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作者：
D. B. Kane;B. Oktem;M. Johnston
一个空气动力学透镜系统，在10-300 nm的尺寸范围内的颗粒的有效传输被用来研究纳米粒子的检测效率，通过激光烧蚀质谱与193 nm和266 nm的辐射。理想情况下，当激光发射时，光束路径中的所有颗粒都应被检测到。然而，颗粒检测的概率远小于1，并且取决于由颗粒尺寸和化学成分定义的颗粒类型以及由激光波长和辐照度定义的烧蚀条件。100 nm以上的颗粒可以被烧蚀并以接近单位效率检测。在100 nm以下，检测概率随着粒径的减小而降低，并且盐颗粒（氯化钠、氯化钾）的检测效率高于有机颗粒（油酸、3-硝基苄醇）。结果进行了讨论，激光烧蚀的机制和粒子探测的仪器要求。
An aerodynamic lens system with efficient transmission of particles in the 10-300 nm size range is used to study the efficiency of nanoparticle detection by laser ablation mass spectrometry with 193 nm and 266 nm radiation. Ideally, all particles in the beam path when the laser fires should be detected. However, the probability of particle detection is much less than 1 and dependent upon the particle type, defined by particle size and chemical composition, and the ablation conditions, defined by the laser wavelength and irradiance. Particles above 100 nm can be ablated and detected with near unit efficiency. Below 100 nm, the detection probability decreases with decreasing particle size and salt particles (sodium chloride, potassium chloride) are detected with higher efficiency than organic particles (oleic acid, 3-nitrobenzyl alcohol). The results are discussed in relation to the mechanism of laser ablation and the instrumental requirements for particle detection.