N. Ulmke et al., Piezoelectric single nozzle droplet generator for production of monodisperse droplets of variable diameter, CHEM ENG TE, 24(1), 2001, pp. 69-70
The further development of a droplet generator which functions without the
use of pressure (drop-on-demand system) for the production of monodisperse
droplets of variable diameter opens up new fields of application.