title: Magnetic field actuated manipulation and transfer of oil droplets on a stable underwater superoleophobic surface.
abstract: The transport of fluids at functional interfaces, driven by the external stimuli, is well established. The lossless transport of oil-based fluids under water remains a challenge, however, due to their high stickiness towards the surface. Here, a superhydrophilic and underwater superoleophobic tri-phase water/oil/solid nanoarray surface has been designed and prepared. The unique tri-phase surface exhibits underwater superoleophobic properties with an extremely low stickiness towards oil-based fluids. The magnetic-field-driven manipulation and transport of oil-based magnetic fluids are demonstrated under water, which opens up a new pathway to design flexible and smart devices for the control and transfer of liquid droplets by using tri-phase systems.
authors.affiliation: Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2500, Australia. yi_du@uow.edu.au.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Feng
authors.forename: Xun
authors.initials: X
authors.lastname: Xu
authors.forename: Weichang
authors.initials: W
authors.lastname: Hao
authors.forename: Yi
authors.initials: Y
authors.lastname: Du
authors.forename: Dongliang
authors.initials: D
authors.lastname: Tian
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang