sensor surface

The biosensor surface is where one of the reactants, typically referred to as the ligand, is immobilized.

A wide variety of surface chemistries designed for specific application are available. The most popular surface from Biacore contains a carboxymethyldextran hydrogel. Other available surfaces include: low charge, shorter dextran, hydrophobic alkane surfaces, as well as plain gold. There are, however, two general methods for assay design:; direct immobilization or capturing.