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The present study is a detailed analysis of the charging performance of aerosol nanoparticles using soft X-ray photoionization. The study includes methods used to suppress the formation of unnecessary nanoparticles during ionization. Using a soft X-ray ionizer, the charging performance was evaluated at different emitting energies (3, 4 and 9.5keV) and for ionization time and chamber type. The results...
At high concentrations of ambient bipolar ions, charged aerosol particles show a stationary charging state as a function of particle size. When the particle diameter exceeds 0.1 μm, a considerable fraction of multiply charged particles is present, which hinders size classification of particles, when a differential mobility analyzer (DMA) is used. However, at low ion concentrations, particle charging...
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