Directional control of droplets on a surface is an important issue for tasks of long-range liquidtransport,
self-cleaning and water repellency. However, it is still challenging to control the structure
motions in orientations so as to control the shedding-off of droplets. Herein, we report a novel
dynamic magnetic responsive wall (DMRW) array on PDMS (polydimethylsiloxane) -based surface.
The walls can easily tilt through the effect of the external magnet because of the magnetic material
in the DMRW. The droplets can be shed off directionally on the surface. Particularly, with the shape
recovery and flexible properties, it achieves simultaneous control of the tilt angles (0-60°) of DMRW
for shedding-off of droplets with different volumes (1-15 μL) under magnetic action on DMRW. The
mechanism of droplet shedding-off on DMRW is elucidated by theory of interfaces. It offers an
insight into design of dynamic interface for water repellency. This strategy realizes the preparation of
multifunctional, tunable and directional drive functions
