Photografted Poly(ethylene glycol) Matrix for Affinity Interaction Studies

Citations Over TimeTop 11% of 2006 papers

Abstract

A poly(ethylene glycol) (PEG)-based matrix for studies of affinity interactions is developed and demonstrated. The PEG matrix, less than 0.1 microm thick, is graft copolymerized onto a cycloolefin polymer from a mixture of PEG methacrylates using a free radical reaction initiated by UV light at 254 nm. The grafting process is monitored in real time, and characteristics such as thickness, homogeneity, relative composition, photostability, and performance in terms of protein resistance in complex biofluids and sensor qualities are investigated with null ellipsometry, infrared spectroscopy, and surface plasmon resonance. The matrix is subsequently modified to contain carboxyl groups, thereby making it possible to immobilize ligands in a controlled and functional manner. Human serum albumin and fibrinogen are immobilized and successfully detected by antibody recognition using surface plasmon resonance. The results are encouraging and suggest that the PEG matrix is suitable for biochip and biosensor applications in demanding biofluids.

Related Papers

• → Stimuli-responsive hydrogel–silver nanoparticles composite for development of localized surface plasmon resonance-based optical biosensor(2008)126 cited
• → Label-free cell-based assay using localized surface plasmon resonance biosensor(2008)74 cited
• → Preparation of graphene oxide-based surface plasmon resonance biosensor with Au bipyramid nanoparticles as sensitivity enhancer(2014)45 cited
• → Construction of biosensors using a gold-binding polypeptide and a miniature integrated surface plasmon resonance sensor(1998)68 cited
• Application of long-range surface plasmon for sensitive detection of Human E.coli(2011)