Manipulation of the Wettability of Surfaces on the 0.1 to 1 Micrometer Scale Through Micromachining and Molecular Self-Assembly

Abstract

Micromachining allows the formation of micrometer-sized regions of bare gold on the surface of a gold film supporting a self-assembled monolayer (SAM) of alkanethiolate. A second SAM forms on the micromachined surfaces on exposing the entire system--the remaining undisturbed gold-supported SAM and the micromachined features of bare gold--to a solution of dialkyldisulfide. By preparing an initial hydrophilic SAM from HS( CH2 )15COOH, micromachining features into this SAM, and covering these features with a hydrophobic SAM formed from [CH(3)(CH(2))(11)S]2, it is possible to construct micrometer-scale hydrophobic lines in a hydrophilic surface. These lines provide new structures with which to manipulate the shapes of liquid drops.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1992
Accession Number
ADA254887

Entities

People

  • George M. Whitesides
  • John P. Folkers
  • Nicholas L Abbott

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Assembly
  • Carbon Fibers
  • Chemistry
  • Classification
  • Fibers
  • Films
  • Hydrophilic Properties
  • Hydrophobic Properties
  • Manufacturing
  • Materials
  • Military Research
  • Monomolecular Films
  • Photolithography
  • Physical Properties
  • Self Assembled Monolayers
  • Self Assembly
  • Surface Properties

Readers

  • Electrochemical Surface Science
  • Geochemistry
  • Integrated Circuit Design and Technology.