In this article we study the influence of the drying kinetics of a droplet on the morphological characteristics of the particles produced, with the aim of modeling the aerodynamic properties of the aerosols thus formed.

We present the development of a new device making it possible to analyze in detail the evaporation of droplets, from their production to the formation of a dry particle, including the nucleation of the first crystals. This experiment makes it possible to study the evaporation of the drops with a temporal resolution lower than a microsecond, and thus to detect very precisely, by image analysis, the deduction of the crystallization. We present a first study carried out on an inorganic salt and which shows, depending on the drying conditions, a wide variety of particle morphologies.

An investigation into the relationship between factors governing droplet drying and resultant particle morphologies, with a specific interest in the aerodynamic properties of dried particles. This work describes a new Falling Droplet Column (FDC), which offers the capability to analyze in detail the entire evaporative lifetime of individual droplets, from generation to dry particle formation, with capability for sub-microsecond temporal resolution and subsequent offline analysis of dried particles by SEM. A comparison of evaporative profiles and resulting morphologies produced in a range of conditions for different inorganic salts is presented. We will explore the specific crystallization events through detailed imaging of aerosol droplets.