Superhydrophobic bionic surfaces with hierarchical microsphere/SWCNT composite arrays

Langmuir. 2007 Feb 13;23(4):2169-74. doi: 10.1021/la0620758. Epub 2006 Nov 16.

Abstract

Superhydrophobic bionic surfaces with hierarchical micro/nano structures were synthesized by decorating single-walled or multiwalled carbon nanotubes (CNTs) on monolayer polystyrene colloidal crystals using a wet chemical self-assembly technique and subsequent surface treatment with a low surface-energy material of fluoroalkylsilane. The bionic surfaces are based on the regularly ordered colloidal crystals, and thus the surfaces have a uniform superhydrophobic property on the whole surface. Moreover, the wettability of the bionic surface can be well controlled by changing the distribution density of CNTs or the size of polystyrene microspheres. The morphologies of the synthesized bionic surfaces bear much resemblance to natural lotus leaves, and the wettability exhibited remarkable superhydrophobicity with a water contact angle of about 165 degrees and a sliding angle of 5 degrees.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bionics
  • Hydrophobic and Hydrophilic Interactions
  • Microscopy, Electron, Scanning
  • Molecular Structure
  • Surface Properties
  • Surface-Active Agents / chemistry*
  • Water

Substances

  • Surface-Active Agents
  • Water