title: Multifunctional CMOS microchip coatings for protein and peptide arrays.
abstract: Complementary metal oxide semiconductor (CMOS) microelectronic chips fulfill important functions in the field of biomedical research, ranging from the generation of high complexity DNA and protein arrays to the detection of specific interactions thereupon. Nevertheless, the issue of merging pure CMOS technology with a chemically stable surface modification which further resists interfering nonspecific protein adsorption has not been addressed yet. We present a novel surface coating for CMOS microchips based on poly(ethylene glycol)methacrylate graft polymer films, which in addition provides high loadings of functional groups for the linkage of probe molecules. The coated microchips were compatible with the harshest conditions emerging in microarray generating methods, thoroughly retaining structural integrity and microelectronic functionality. Nonspecific adsorption of proteins on the chip's surface was completely obviated even with complex serum protein mixtures. We could demonstrate the background-free antibody staining of immobilized probe molecules without using any blocking agents, encouraging further integration of CMOS technology in proteome research.
authors.affiliation: German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany. V.Stadler@dkfz.de
authors.forename: Volker
authors.initials: V
authors.lastname: Stadler
authors.forename: Mario
authors.initials: M
authors.lastname: Beyer
authors.forename: Kai
authors.initials: K
authors.lastname: König
authors.forename: Alexander
authors.initials: A
authors.lastname: Nesterov
authors.forename: Gloria
authors.initials: G
authors.lastname: Torralba
authors.forename: Volker
authors.initials: V
authors.lastname: Lindenstruth
authors.forename: Michael
authors.initials: M
authors.lastname: Hausmann
authors.forename: F Ralf
authors.initials: FR
authors.lastname: Bischoff
authors.forename: Frank
authors.initials: F
authors.lastname: Breitling
mesh_terms: D000327:Adsorption; D011108:Polymers / Q000737:chemistry*; D040081:Protein Array Analysis / Q000295:instrumentation / Q000379:methods*; D011506:Proteins / Q000032:analysis; D012666:Semiconductors; D013499:Surface Properties
chemical_list: D011108:Polymers; D011506:Proteins