Oxidation of Optically Trapped Organic Squalene Aerosol: Ultraviolet Refractive Index Changes upon Ozonolysis and Light-Induced Oxidation
Abstract
Organic atmospheric aerosol particles are regularly oxidized, modifying their physical, chemical, and optical properties and affecting the radiative balance of the planet. The organic compound squalene is commonly found in organic particulate matter and regularly undergoes aging by atmospheric oxidants. Here, broadband light Mie spectroscopy is used to monitor the radius and refractive index dispersion of optically trapped squalene aerosol particles over near-ultraviolet to visible wavelengths of 0.320–0.480 μm, throughout atmospheric oxidation by ozone. Extension of broadband light Mie spectroscopy measurements to wavelengths
Fields of Study & Subjects
Atmospheric chemistry and aerosols
Atmospheric aerosols and clouds
Advanced Combustion Engine Technologies
Publication details
- Journal / source
- ACS Earth and Space Chemistry
- Volume
- 10
- Issue
- 2
- Pages
- 421–433
- Publication date
- 13 January 2026
- Language
- EN