Regulating water adhesion on superhydrophobic TiO2 nanotube arrays

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Ziying Hu
  • Xuming Zhang
  • Zhaoyue Liu
  • Kaifu Huo
  • Jin Zhai
  • Lei Jiang

Detail(s)

Original languageEnglish
Pages (from-to)6381-6388
Journal / PublicationAdvanced Functional Materials
Volume24
Issue number40
Online published19 Aug 2014
Publication statusPublished - 29 Oct 2014

Abstract

Bioinspired surfaces with special wettability have attracted a significant attention in recent years because of their potential applications for no loss liquid transfer, anti-icing, and self-cleaning. Herein, the realization of two extreme superhydrophobic states on 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane-modified TiO2 nanotube arrays (NTAs) is described by changing the structural characteristics of nanotubes while keeping the surface chemical composition constant. The water adhesive force is regulated in a wide range from ≈4.4 to ≈89.6 μN by the nanotubular diameter, length, density, and surface roughness. The cooperation effect between the negative pressures induced by the volume change of sealed air-pockets and the van der Waals' attraction at solid-liquid interface contributes to the water adhesion. The superhydrophobic TiO 2 NTAs with a high adhesive force is used as a "mechanical hand" to transfer water microdroplets without any loss, and the one with extremely low adhesive force is utilized as a self-cleaning and anti-icing surface.

Citation Format(s)

Regulating water adhesion on superhydrophobic TiO2 nanotube arrays. / Hu, Ziying; Zhang, Xuming; Liu, Zhaoyue; Huo, Kaifu; Chu, Paul K.; Zhai, Jin; Jiang, Lei.

In: Advanced Functional Materials, Vol. 24, No. 40, 29.10.2014, p. 6381-6388.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal