Fig. 3From: Detection of cancer antigens (CA-125) using gold nano particles on interdigitated electrode-based microfluidic biosensora Schematic representation at various stages of biosensor fabrication: (i) Bare electrodes (ii) SAM layer on the bare electrodes (iii) immobilized gold nano particles on the SAM layer (iv) Antibody immobilization on the electrodes (v) antigen–antibody conjugation on the electrodes. b Real image of the biosensor with microchannelBack to article page