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The detection efficiency of Condensation Particle Counters (CPCs) reduces drastically as particle size becomes smaller than 2nm. Increasing the supersaturation in order to enhance the detection efficiency, has limited applicability because the onset supersaturation value of droplet formation by homogeneous nucleation is very close to the heterogeneous onset supersaturation for sub-2nm particles. In...
Hygroscopic Tandem Differential Mobility Analyzers (HTDMAs) are widely used to measure the water uptake characteristics of aerosol particles. As has been shown experimentally in the past, potential differences in the relative humidity (RH) between the aerosol and the sheath flow of the second Differential Mobility Analyzer (DMA) can lead to erroneous estimates of the apparent hygroscopic behavior...
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