Jetting of droplet induced by ZnO-Si surface acoustic waves —

This is a high speed video showing jetting behaviour of a 20μL water droplet induced by ZnO surface acoustic waves (from left side). The jetting is induced by sub-nanometre amplitudes of surface acoustic waves interacting with water droplet, causing the droplet jetting along Rayleigh angle. However, due to a combination of acoustic pressure, internal flow, gravity force, surface tension and capillary, the droplet has been deformed significantly before fully jetted from substrates. The video is not a composite and has not been enhanced.

https://downloads.sms.cam.ac.uk/2532044/2532051.mp4