Investigating the Interface of Superhydrophobic Surfaces in Contact With Water

Abstract

Neutron reflectivity (NR) is used to probe the solid, liquid, vapor interface of a porous superhydrophobic (SH) surface submerged in water. A low-temperature, low-pressure technique was used to prepare a rough, highly porous organosilica aerogel-like film. UV/ozone treatments were used to control the surface coverage of hydrophobic organic ligands on the silica framework, allowing the contact angle with water to be continuously varied over the range of 160 (superhydrophobic) to <10 (hydrophilic). NR shows that the superhydrophobic nature of the surface prevents infiltration of water into the porous film. Atomic force microscopy and density functional theory simulations are used in combination to interpret the NR results and help establish the location, width, and nature of the SH film-water interface.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 11, 2005
Accession Number
ADA459324

Entities

People

  • Anthony P. Malanoski
  • C. J. Brinker
  • Dhaval A. Doshi
  • Eric D. Branson
  • Erik B. Watkins
  • Frank Von Swol
  • Jaroslaw Majewski
  • Pratik B. Shah
  • Seema Singh

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Chemistry
  • Density Functional Theory
  • Electron Microscopy
  • Engineered Materials
  • Films
  • Hydrophilic Properties
  • Hydrophobic Properties
  • Measurement
  • Microscopy
  • Military Research
  • Neutron Scattering
  • New Mexico
  • Particles
  • Scattering
  • Simulations
  • Surface Chemistry
  • Surface Roughness

Fields of Study

  • Chemistry

Readers

  • Environmental Engineering
  • Solar Physics
  • Surface Coatings Technology.