title: Controlling the Adhesion of Superhydrophobic Surfaces Using Electrolyte Jet Machining Techniques.
abstract: Patterns with controllable adhesion on superhydrophobic areas have various biomedical and chemical applications. Electrolyte jet machining technique (EJM), an electrochemical machining method, was firstly exploited in constructing dimples with various profiles on the superhydrophobic Al alloy surface using different processing parameters. Sliding angles of water droplets on those dimples firstly increased and then stabilized at a certain value with the increase of the processing time or the applied voltages of the EJM, indicating that surfaces with different adhesion force could be obtained by regulating the processing parameters. The contact angle hysteresis and the adhesion force that restricts the droplet from sliding off were investigated through experiments. The results show that the adhesion force could be well described using the classical Furmidge equation. On account of this controllable adhesion force, water droplets could either be firmly pinned to the surface, forming various patterns or slide off at designed tilting angles at specified positions on a superhydrophobic surface. Such dimples on superhydrophopbic surfaces can be applied in water harvesting, biochemical analysis and lab-on-chip devices.
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Yang
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
authors.forename: Yao
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Shining
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Mingqian
authors.initials: M
authors.lastname: Gao
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Jinlong
authors.initials: J
authors.lastname: Song
authors.affiliation: Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116023, People's Republic of China.
authors.forename: Wenji
authors.initials: W
authors.lastname: Xu