Patent ID: 8114955

Claim:
A sensor for an analyte comprising: a working electrode junction comprising a polymer, a counterelectrode, a variable voltage source, and a current measuring device; whereby exposure of said polymer to the analyte is capable of causing a shift in the onset potential for conductivity or semiconductivity of said polymer, said polymer comprising monomer units of structure I, wherein: A, X and Y are independently selected from the group consisting of O, S, Se, Te and NR, where R is selected from the group consisting of optionally substituted alkyl groups and optionally substituted aryl groups, G is a group which, in a form in which it is unbound to the analyte, is capable of interacting with the analyte, and is selected from the group consisting of CH 2 OCH 2 -carboxyl and CH 2 OCH 2 C(O)NH-(oligodeoxynucleotide), and G a , G b and G c are independently selected from the group consisting of hydrogen, optionally substituted alkyl groups and optionally substituted aryl groups.