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Bioinspired Metal-Intermetallic Laminated Composites for the Fabrication of Superhydrophobic Surfaces with Responsive Wettability

  • Jian Cao
    Jian Cao
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    More by Jian Cao
  • Dejun Gao
    Dejun Gao
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    More by Dejun Gao
  • Chun Li
    Chun Li
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    More by Chun Li
  • Xiaoqing Si
    Xiaoqing Si
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    More by Xiaoqing Si
  • Jianshu Jia
    Jianshu Jia
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    More by Jianshu Jia
  • , and 
  • Junlei Qi*
    Junlei Qi
    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
    *Email: [email protected]
    More by Junlei Qi
Cite this: ACS Appl. Mater. Interfaces 2021, 13, 4, 5834–5843
Publication Date (Web):January 19, 2021
https://doi.org/10.1021/acsami.0c20639
Copyright © 2021 American Chemical Society
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Abstract

Hundreds of copper and titanium foils were applied to prepare biomimetic metal-intermetallic laminated composites by diffusion bonding. The cross sections of the obtained diffusion bonded bulks were etched selectively with FeCl3 solution to get regular microarray structures. This kind of microstructure was controlled accurately and promptly by simple parameter adjustment. The etched surfaces were modified with 1-dodecanethiol, and the water contact angles (WCAs) were measured. The relationship between the microstructure and wettability of the achieved material was discussed, and the reason for the anisotropic wettability was also analyzed. Then etched surfaces were anodized in different electrolyte solutions to obtain different nanostructures. The morphology and chemical compositions of the surfaces were analyzed. The surfaces with CuO nanostructures by modification show superhydrophobicity with self-cleaning, on which the WCA and water sliding angle are 160.9° and 0.8°, respectively. The surfaces with TiO2 nanostructures without modification show ultraviolet light-responsive wettability. After modification with 11-mercaptoundecanoic acid and 1-decanethiol, the surfaces also exhibit pH-responsive wettability. The superhydrophobic surfaces with responsive wettability have potential applications in biotechnology and microfluidics.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsami.0c20639.

  • SEM images of the bonding interface; the influence of bonding temperature and time on interface; different thicknesses of Cu foils; EDS chemical analysis; surfaces with different groove widths; etch depth varies with etching time; anodized surfaces with different current intensity and time; WCAs and WSAs of anodized surfaces; droplets bounce; self-cleaning effect (PDF)

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Cited By


This article is cited by 1 publications.

  1. Seung-Hyun Kim, Hong Suk Kang, Eun-Ho Sohn, Bong-Jun Chang, In Jun Park, Sang Goo Lee. A strategy for preparing controllable, superhydrophobic, strongly sticky surfaces using SiO 2 @PVDF raspberry core–shell particles. RSC Advances 2021, 11 (38) , 23631-23636. https://doi.org/10.1039/D1RA03928H