  A proof-of-concept demonstration of the electrowetting-on-dielectric of a
sessile soap bubble is reported here. The bubbles are generated using a
commercial soap bubble mixture - the surfaces are composed of highly doped,
commercial silicon wafers covered with nanometre thick films of Teflon.
Voltages less than 40V are sufficient to observe the modification of the bubble
shape and the apparent bubble contact angle. Such observations open the way to
inter alia the possibility of bubble-transport, as opposed to
droplet-transport, in fluidic microsystems (e.g. laboratory-on-a-chip) - the
potential gains in terms of volume, speed and surface/volume ratio are
non-negligible.
