Redox cycling-based electrochemical CMOS imaging sensor for real time and selective imaging of redox analytes

•Integration of redox cycling-based electrodes and CMOS electrochemical imaging sensor.•Tracking a diffusion of redox analytes such as ferrocene methanol and dopamine.•Selective imaging of dopamine in the presence of ascorbic acid.•Tracking a dopamine release from PC12 spheroids in the presence of ascorbic acid.