Patterned poly(oligoethylene glycol acrylate) brushes on silica substrates

POLY 394

Huilin Tu,, Carla E. Heitzman,, Rachel C. Evans,, and Paul V. Braun, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green Street, Urbana, IL 61801
We have fabricated patterned poly(oligoethylene glycol acrylate) (POEGA) brushes on oxidized silicon wafers by the micro-contact printing of a self-assembled surface initiator followed by the surface-initiated atom transfer radical polymerization (ATRP) of oligoethylene glycol acrylate (OEGA). By adjusting the polymerization time, the POEGA brush thickness can be varied from a few nanometers up to about 100 nm. The POEGA brushes was characterized with XPS, tapping mode AFM, ellipsometry and contact angle goniometry. AFM characterization confirmed the success in micropatterning of the POEGA brushes. The water contact angles of the POEGA brushes are around 47 degree, indicating the formation of hydrophilic surfaces. The patterned POEGA brushes on silica substrates may be useful for many applications including surface-confined molecular delivery, biomolecular sensing, and molecular separation.

Polymer Surfaces And Interfaces
6:00 PM-8:00 PM, Tuesday, 15 March 2005 Convention Center -- Sails Pavilion, Poster

Division of Polymer Chemistry

The 229th ACS National Meeting, in San Diego, CA, March 13-17, 2005