Abstract
There has been increasing interest in powering and controlling the motion of small objects. In this review article, I describe delivery of fluids using particle–stabilized soft dispersed systems (liquid marbles and bubbles) on a planar water surface by external stimuli, followed by release of inner fluids. The position, area, timing, direction and velocity of delivery can be remotely controlled by light and air blow, and it is possible to release encapsulated fluids at a specific place and time by other external stimuli. Furthermore, the liquid marbles and bubbles are demonstrated to be able to work as towing engines to push objects on water surface. Remote transport of the small objects by external stimulus and on–demand control of the release of encapsulated active substances should open up a wide field of conceivable applications.
