title: Controlled droplet transport to target on a high adhesion surface with multi-gradients.
abstract: We introduce multi-gradients including Laplace pressure gradient, wettable gradient and wettable different gradient on a high adhesion surface via special wedge-pattern and improved anodic oxidation method. As a result of the cooperative effect mentioned above, controlled directional motion of a droplet on a high adhesion surface is realized, even when the surface is turned upside down. The droplet motion can be predicted and the movement distances can be controlled by simply adjusting the wedge angle and droplet volume. More interestingly, when Laplace pressure gradient is introduced on a V-shaped wettable gradient surface, two droplets can move toward one another as designed.
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Siyan
authors.initials: S
authors.lastname: Deng
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Shang
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Shile
authors.initials: S
authors.lastname: Feng
authors.affiliation: Department of Measurement Control and Information Technology, School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Shiping
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xing
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Yongping
authors.initials: Y
authors.lastname: Hou
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Zheng