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Relative humidity anneal effect on hygroscopicity of aerosol particles studied by rapid‐scan FTIR‐ATR spectroscopy
Author(s) -
Lu PeiDong,
He Ting,
Zhang YunHong
Publication year - 2008
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl035302
Subject(s) - relative humidity , aerosol , fourier transform infrared spectroscopy , attenuated total reflection , materials science , humidity , annealing (glass) , spectroscopy , analytical chemistry (journal) , infrared , chemistry , optics , composite material , environmental chemistry , meteorology , organic chemistry , quantum mechanics , physics
Rapid‐scan Fourier transform infrared attenuated total reflection (FTIR‐ATR) spectroscopy was employed to study the effect of the relative humidity anneal on the hygroscopicity of NaCl, NaNO 3 and NaClO 4 aerosol particles. The annealed NaCl, NaNO 3 and NaClO 4 particles deliquesced at the relative humidity of ∼83%, ∼87% and ∼48%, respectively, which are much higher than the deliquescence relative humidity of the unannealed particles. The annealing of the particles was suggested to reduce the surface defects, and thereby delayed the deliquescence relative humidity of hygroscopic aerosol particles, which should be a ubiquitous process in the atmosphere.