A sensitive sensor platform for detection of carcinoembryonic antigen was fabricated.
The polyaniline-Au nanoparticles (PANi-Au NPs) was used as immuno-nanoprobe.
The gap-based interdigitated electrode (IDEs) was used as sensor platform.
The immunosensor exhibits excellent analytical performance for the detection of CEA.
The proposed immunosensor could be applied to clinical detection of CEA.