Patent ID: 8460923

Claim:
A biosensor article comprising: a substrate having polymer associated with the substrate surface, the polymer comprises: a polymer of formula (I) having at least one of: a metal-ion chelating group (x), an ionizable group (y), and a surface substantive group (z), where R is absent, hydrogen, or a substituted or unsubstituted, linear or branched, monovalent hydrocarbyl moiety having from 1 to 6 carbon atoms; R′ is a substituted or unsubstituted, linear or branched, divalent hydrocarbyl moiety resulting from copolymerization of an unsaturated monomer having from 1 to 18 carbon atoms; R″ is a substituted or unsubstituted, linear or branched, divalent hydrocarbyl moiety having from 1 to 20 carbon atoms; S comprises at least one point of attachment to the substrate; W comprises at least one metal-ion chelator moiety; X is an —NH—, —NR—, or O; and the mole ratio of x:(y+z) groups is from about 2:8 to about 8:2.