Study on conductance of supersaturated chloride microdroplets

Abstract

By using the measuring system previously designed by the authors, the conductance of KCl, NaCl and NH 4 Cl microdroplets is obtained in the whole measuring RH range, especially in the supersaturation region, which cannot be acquired from the bulk solutions and fills the gap of lack of experimental data of conductance under the supersaturated state. The ERH and DRH of these three kinds of microdroplets observed from a microscope are 80.5% and 95.4% (KCl), 75.7% and 93.3% (NaCl), and 69.9% and 96.6% (NH 4 Cl), respectively. In addition, it can be found from the dependence of conductance on RH that conductance is very sensitive to the existence of water molecules inside the microdroplet and the threshold of the deliquescence process can be predicted by the variation of conductance.

Electric field-induced oscillation of sessile droplets

“…The recent surge of interest in micro-and nano-systems has focused increasing attention on small-scale liquid droplets [1][2][3] and their manipulation, e.g. droplet transport, separation and fusion.…”