Predicting the influence of particle size on the glass transition temperature and viscosity of secondary organic material.

ABSTRACT: Atmospheric aerosols can assume liquid, amorphous semi-solid or glassy, and crystalline phase states. Particle phase state plays a critical role in understanding and predicting aerosol impacts on human health, visibility, cloud formation, and climate. Melting point depression increases with decreasing particle diameter and is predicted by the Gibbs-Thompson relationship. This work reviews existing data on the melting point depression to constrain a simple parameterization of the process. The parameter [Formula: see text] describes the degree to which particle size lowers the melting point and is found to vary between 300 and 1800 K nm for a wide range of particle compositions. The parameterization is used together with existing frameworks for modeling the temperature and RH dependence of v

SUBMITTER: Petters M 

PROVIDER: S-EPMC7495436 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature