Actively driven cantilever array. The actuation of the piezo-electric stack that was mounted directly underneath the cantilever chip allowed boosting individual sensor frequency responses. The piezo-electric stack exhibits a non-linear response towards higher frequencies. Resonance oscillation peaks were amplified which was enhancing their detectability. Actuation voltages from 2 - 5 volts are shown, the response was non linear and the y-axis is displayed in a log scale. For routine measurements an actuation voltage around 4 volts with a gain of 500 was chosen.