 Therefore, the knowledge on stability of nanoparticle agglomerates is important for predicting the size of aerosol particles, which helps assess the potential risk of them to human bodies.Different experimental systems have been established to test the stability of airborne particles and their potentials to deagglomerate under various conditions.A comprehensive system recently reported is able to maintain robust aerosolization process and generate aerosols with stable number concentration and mean size from nano-powders.