Patent ID: 8148160

Claim:
A method for molecular sensing, which comprises using an electrode for molecular sensing comprising, a conductive metal oxide having surface hydroxyl groups, and a detecting molecule capable of shifting a surface potential of said electrode when it interacts with at least one indole-ring-containing compound, wherein the detecting molecule is a disuccinimidyl alkylenedicarboxylate having a linear alkylene group of from four to ten carbon atoms that is modified with human serum albumin, the indole-ring-containing compound shifts said surface potential by interacting with said disuccinimidyl alkylenedicarboxylate having a linear alkylene group of from four to ten carbon atoms that is modified with human serum albumin and said detecting molecule is bound to the surface hydroxyl groups on the conductive metal oxide via an aminoalkylalkoxysilane, and based on a shift in the surface potential of said electrode, detecting an indole ring-containing compound.