title: Controlling liquid splash on superhydrophobic surfaces by a vesicle surfactant.
abstract: Deposition of liquid droplets on solid surfaces is of great importance to many fundamental scientific principles and technological applications, such as spraying, coating, and printing. For example, during the process of pesticide spraying, more than 50% of agrochemicals are lost because of the undesired bouncing and splashing behaviors on hydrophobic or superhydrophobic leaves. We show that this kind of splashing on superhydrophobic surfaces can be greatly inhibited by adding a small amount of a vesicular surfactant, Aerosol OT. Rather than reducing splashing by increasing the viscosity via polymer additives, the vesicular surfactant confines the motion of liquid with the help of wettability transition and thus inhibits the splash. Significantly, the vesicular surfactant exhibits a distinguished ability to alter the surface wettability during the first inertial spreading stage of ~2 ms because of its dense aggregates at the air/water interface. A comprehensive model proposed by this idea could help in understanding the complex interfacial interactions at the solid/liquid/air interface.
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.; Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.; College of Sciences, Henan Agricultural University, Zhengzhou, Henan 450001, China.
authors.forename: Meirong
authors.identifier: 0000-0001-7304-1426
authors.initials: M
authors.lastname: Song
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ju
authors.affiliation: Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Siqi
authors.identifier: 0000-0002-5763-2872
authors.initials: S
authors.lastname: Luo
authors.affiliation: Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yuchun
authors.initials: Y
authors.lastname: Han
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Zhichao
authors.identifier: 0000-0002-6558-0531
authors.initials: Z
authors.lastname: Dong
authors.affiliation: Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yilin
authors.identifier: 0000-0002-8455-390X
authors.initials: Y
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Zhen
authors.identifier: 0000-0001-8905-3018
authors.initials: Z
authors.lastname: Gu
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Lingjuan
authors.identifier: 0000-0002-8442-4411
authors.initials: L
authors.lastname: Zhang
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Ruiran
authors.identifier: 0000-0002-4681-1760
authors.initials: R
authors.lastname: Hao
authors.affiliation: CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang
keywords: Superhydrophobic; liquid deposition; vesicle surfactant