Fig. 4

Kinetics of formation of the enzymatic product for different concentrations of antibodies used for the oriented immobilization (ppm = parts per million, i.e. µg/mL in water). Rates are expressed in units of cm⁻¹ s⁻¹. The dotted line represents the unspecific signal for particles modified with 100 µg/mL IgG anti-PCB169 and exhibiting R = 1.6e⁻⁵ cm⁻¹ s⁻¹. The case of protein G-coated GNRs without any antibody corresponds to R = 8.9e⁻⁶ cm⁻¹s⁻¹