Design and Characterisation of a Non-Contact Flexible Sensor Array for Electric Potential Imaging Applications

Capacitive non-contact imaging of electric fields and potentials with micro-metre resolution can provide relevant insights into material characterisation, structural analysis, electrostatic charge bio-sensing applications. However, scanning potential microscopes have been confined to rigid single-probe devices, making them slow, prone mechanical damage complex fabricate. In this work, we present the design characterisation a novel 5-element flexible array probes spatial down 20?m speed up time. This was achieved by combining thin-film for active guarding shielding state-of-the art discrete conditioning circuits. The approach is showcased using fabricated image latent fingerprints deposited on an insulating surface contact electrification, obtain topography conductive samples visualise local dielectric variations.