Fabrication of porus polymer monoliths covalently attached to the walls of channels in plastic microdevices

Timothy B. Stachowiak, Thomas Rohr, Emily F. Hilder, Dominic S. Peterson, Mingqiang Yi, Frantisek Svec, Jean M.J. Fréchet

Research output: Contribution to journalArticlepeer-review

146 Scopus citations


UV-initiated grafting of plastic tubes and microfluidic chips with ethylene diacrylate followed by the preparation of porous polymer monoliths has been studied. The first step affords a thin grafted layer of polymer with a multiplicity of pendent double bonds that are then used in the second step for covalent attachment of the monolith to the wall. As clearly seen on scanning electron micrographs, this procedure prevents the formation of voids at the monolith-channel interface a problem that has always plagued approaches involving bulk polymerization in nontreated channels due to the shrinkage of the monolith during the polymerization process and its lack of compatibility with the material of the device. Irradiation with UV light through a photomask allows precise patterning specifying both the area subjected to surface modification and the location of the monolith within specific areas of the device.

Original languageEnglish (US)
Pages (from-to)3689-3693
Number of pages5
Issue number21
StatePublished - Nov 2003
Externally publishedYes


  • Microchip
  • Microfluidic
  • Miniaturization
  • Monolith
  • Porous polymer

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry


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