Chemically modified polacrylic acid monolayers in alumina nanoporous membranes for cancer detection

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We report the synthesis and modification of polyacrylic acid (PAA) monolayers in nanoporous alumina membranes. PAA was adsorbed onto the membrane surface using solution self-assembly to provide 0.5 -1 nm films that are robustly bound as carboxylate groups on the basic alumina surface. About 40% of the carboxylic acid groups are free to undego chemical reactions. Using amine linker chemistry and carbodiimide coupling, estradiol functionality was covaltently linked to the PAA monolayers chemisorbed on the nanoporous alumina. These sturctures were evaluated for binding to enzymes linked with breast cancer. Strategies and results for integrating on the surface of microelectrode array based chemirestitive biosensors are presented.

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Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2008: Microsystems, Photonics, Sensors, Fluidics, Modeling, and Simulation – Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 3
Published: June 1, 2008
Pages: 351 - 354
Industry sectors: Medical & Biotech | Sensors, MEMS, Electronics
Topic: Micro & Bio Fluidics, Lab-on-Chip
ISBN: 978-1-4200-8505-1