A self-powered and reagent-less electrochemical aptasensor based on a DNA walker and tetraferrocene for the detection of aflatoxin B1

. The sensor displayed good performance even for samples with a complex matrix, such as a peanut sample. The recoveries of AFB1 obtained ranged from 95.5 to 106.8%. The developed sensing platform is reagent-less, self-powered, and highly sensitive. It holds great potential for detection of AFB1 in environmental and food samples.