Patent ID: 8286486

Claim:
A method for determining a surface coverage of a material, the method comprising: providing a predetermined concentration of the material; and exposing the surface to the provided material until equilibrium is established in a molecular reaction between the surface and the material, wherein: the surface comprises a surface of a non-piezoelectric layer of a piezoelectric cantilever sensor, the piezoelectric cantilever sensor comprising: a piezoelectric layer comprising a proximate end and a distal end; a non-piezoelectric layer comprising a proximate end and a distal end, wherein at least a portion of the piezoelectric layer is coupled to at least a portion of the non-piezoelectric layer such that the piezoelectric layer and the non-piezoelectric layer are not coextensive; a base portion coupled to the proximate end of the piezoelectric layer, wherein the base portion is not attached to the proximate end of the non-piezoelectric layer; and electrodes operatively associated with the piezoelectric layer; and equilibrium is determined in accordance an amount of mass of the material accumulated on the surface.