Stable Superhydrophobic Coatings from Polyelectrolyte Multilayers

Lei Zhai,‡ Fevzi Ç. Cebeci,‡§ Robert E. Cohen,*† and Michael F. Rubner*‡
Departments of Chemical Engineering and Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Department of Chemistry, Istanbul Technical University, 34469, Istanbul, Turkey
Nano Letters, 2004, 4 (7), pp 1349–1353
DOI: 10.1021/nl049463j
Publication Date (Web): May 18, 2004
Copyright © 2004 American Chemical Society
‡

 Department of Materials Science and Engineering, MIT.

,
§

 Department of Chemistry, Istanbul Technical University.

,
*

 Corresponding authors. E-mail:  recohen@mit.edu; rubner@mit.edu.

,
†

 Department of Chemical Engineering, MIT.

Abstract

Abstract Image

The present study demonstrates that the superhydrophobic behavior of the lotus leaf structure can be mimicked by creating a honeycomb-like polyelectrolyte multilayer surface overcoated with silica nanoparticles. Superhydrophobicity was achieved by coating this highly textured multilayer surface with a semifluorinated silane. The surface maintains its superhydrophobic character even after extended immersion in water. The key structural elements needed to create stable, superhydrophobic coatings from polyelectrolyte multilayers are discussed.

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History

  • Published In Issue July 14, 2004
  • Received April 9, 2004
    Revised Manuscript Received May 5, 2004

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