Superhydrophobicity of Hierarchical and ZNO Nanowire Coatings

Abstract

Hierarchical superhydrophobic surfaces were constructed by growing various lengths of ZnO nanowires on microscale Si pyramids produced by chemical etching. The nano-size effect on wettability of nano/micro complex structures has been investigated by adjusting the ZnO nanowire length. As the nanowire length on the Si pyramid surface increases, a transition from the Wenzel state to the Cassie state occurs. A water contact angle as high as 169.1 , with a contact angle hysteresis less than 1.3 , was formed by growing ZnO nanowires of a suitable length on Si micro-pyramids. Compression and impact experiments further demonstrate the robust superhydrophobicity of ZnO nanowire Si pyramid hierarchical structures.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2014
Accession Number
ADA607585

Entities

People

  • Daniel Jasion
  • Hongdi Zhang
  • Maogang Gong
  • Shenqiang Ren
  • Shin Mou
  • Xiaoliang Xu
  • Yunze Long
  • Zhou Yang

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Chemical Etching
  • Chemistry
  • Etching
  • Fabrication
  • Hydrophobic Properties
  • Hysteresis
  • Manufacturing
  • Materials
  • Materials Processing
  • Nanomaterials
  • Nanostructures
  • Nanotechnology
  • Nanowires
  • Reaction Time
  • Transitions

Readers

  • Nanofabrication and Microfabrication.
  • Regression Analysis.
  • Surface Coatings Technology.