In-situ FTIR-ATR spectroscopic observation on the dynamic efflorescence/deliquescence processes of Na2SO4 and mixed Na2SO4/glycerol droplets

- Organic compounds affect the hygroscopicity properties of atmospheric aerosols.
- Glycerol suppress nucleation of the mixed Na2SO4/glycerol droplets.
- The efflorescence of aerosols promotes the transformation of glycerol from γγ to αα.
- Glycerol suppresses the formation of CIPs between Na+ and SO42− in mixed droplets.