Probing the Freezing Chemistry of Singly Levitated Aqueous Trifluoroacetic Acid Droplets in a Cryogenically Cooled Simulation Chamber Relevant to Earth’s Upper Troposphere

This study explores an intriguing freezing chemistry of “forever chemical” – trifluoroacetic acid (TFA, CF 3 COOH) in clouds, unravelling a missing link on ice nucleation.