Liquid Metal Droplet (image) RMIT University Share Print E-Mail Caption Continuous motion of a self-propelling liquid metal droplet under a pH gradient, shown at different time intervals. The droplet is placed in a fluidic channel, midway between two reservoirs filled with different electrolytes of acidic and basic nature. Credit RMIT University Usage Restrictions Credit RMIT University. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.