Super-spreading on superamphiphilic micro-organized nanochannel anodic aluminum oxide surfaces for heat dissipation

Zhongpeng Zhu; Yupeng Chen; Zhe Xu; Zhenwei Yu; Xianfeng Luo; Jiajia Zhou; Ye Tian; Lei Jiang

doi:10.1016/j.isci.2021.102334

Super-spreading on superamphiphilic micro-organized nanochannel anodic aluminum oxide surfaces for heat dissipation

iScience. 2021 Mar 19;24(4):102334. doi: 10.1016/j.isci.2021.102334. eCollection 2021 Apr 23.

Authors

Zhongpeng Zhu¹, Yupeng Chen¹, Zhe Xu¹, Zhenwei Yu¹, Xianfeng Luo², Jiajia Zhou¹, Ye Tian^{3

4}, Lei Jiang^{1

3

4}

Affiliations

¹ Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
² College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Xuefu Road, No. 52, Harbin 150080, Heilongjiang, PR China.
³ Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
⁴ University of Chinese Academy of Sciences, Beijing 100049, P. R. China.

Abstract

Nature-inspired superamphiphilic surfaces have drawn tremendous attention owing to its extreme liquid-loving behaviors. Herein, a micro-organized nano-channel (Mo-Na) superamphiphilic anodic aluminum oxide (AAO) surface with long-lasting superamphiphilic property is prepared by a facile one-step anodization method with controllable temperature change. Analysis of dynamic wetting behaviors on superamphiphilic Mo-Na AAO surfaces for various liquids reveals that the spreading factor is in negative correlation with the surface tension and liquid polarity. Detailed observation of the three-phase contact line shows a micro-scale capillary film on superamphiphilic Mo-Na AAO surfaces, which results from the horizontal component of the capillary force. Taking advantage of the superamphiphilic property, water droplets can spread completely on these Mo-Na AAO surfaces within a short time, which can be applied for efficient heat dissipation. Moreover, the unique AAO surface with Mo-Na structures also offers an effective template for future efforts in AAO-based composite devices.

Keywords: Biomimetics; Materials Property; Surface Property.