Supramolecular assembly of water-soluble poly(ferrocenylsilanes): Multilayer structures and properties on flat interfaces

POLY 421

Yujie Ma, Y.Ma@tnw.utwente.nl1, Mark A. Hempenius, m.a.hempenius@utwente.nl1, E. Stefan Kooij2, Wenfei Dong3, Helmuth Möhwald, helmuth.moewald@mpikg-golm.mpg.de4, and G. Julius Vancso, g.j.vancso@utwente.nl1. (1) Department of Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, Netherlands, (2) Department of Applied Physics, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, Netherlands, (3) Jilin University, Jilin, China, (4) Department of Interfaces, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Golm, Germany
Water-soluble poly(ferrocenylsilane) strong polyelectrolytes have been successfully employed in the electrostatic layer-by-layer supramolecular assemly to give fully organometallic polyelectrolyte multilayers on planar substrates. UV/Vis spectroscopy, spectroscopic ellipsometry and quartz crystal microgravimetry proved that the film growth followed a linear profile. Additional ellipsometric studies showed a square root dependence of the film thickness on salt concentrations of the polyelectrolyte solutions. The redox-responsive characteristic of PFS renders the multilayers removable by chemical oxidation. UV/Vis spectroscopy and ellipsometry measurements exhibited fast and complete PFS multilayer removal by exposure to FeCl3 solutions. Making use of their erasable properties, PFS multilayer patterns were successfully created by a MIMIC procedure using hydrophilic PDMS stamps and FeCl3 solutions as ink. Unique macroporous multilayers were obtained when PFS polycations were assembled with double-stranded, high molar mass DNA in a similar layer-by-layer fashion.
 

Metal-Containing and Metallo-Supramolecular Polymers and Materials
6:00 PM-8:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007