Patterning biomolecules with a water-soluble release and protection interlayer

Langmuir. 2007 Nov 6;23(23):11377-80. doi: 10.1021/la702076u. Epub 2007 Oct 13.

Abstract

We report on a general lithography method for high-resolution biomolecule patterning with a bilayer resist system. Biomolecules are first immobilized on the surface of a substrate and covered by a release-and-protection interlayer of water-soluble polymer. Patterns can then be obtained by lithography with a spin-coated resist layer in a conventional way and transferred onto the substrate by reactive ion etching. Afterward, the resist layer is removed by dissolution in water. To demonstrate a high-resolution patterning, soft UV nanoimprint lithography has been used to produce high-density dot arrays of poly-(L-lysine) molecules on a glass substrate. Both fluorescence images and cell proliferation behaviors on such a patterned substrate have shown evidence of improved stability of biomolecule immobilization comparing to that obtained by microcontact printing techniques.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biocompatible Materials / chemistry*
  • Cell Adhesion
  • Cell Proliferation
  • Cells, Cultured
  • Glass / chemistry*
  • Humans
  • Materials Testing*
  • Microscopy, Fluorescence
  • Nanotechnology / instrumentation
  • Nanotechnology / methods*
  • Polylysine / chemistry*
  • Solubility
  • Surface Properties
  • Time Factors
  • Water / chemistry*

Substances

  • Biocompatible Materials
  • Water
  • Polylysine