Interfacial nitrogen doping atomically matching with electro-biomolecules

(a)Morphology characteristics(top plane:scanning electron micrograph;bottom planes:transmission electron micrographs)of nitrogen-doped carbon nanowires(N-CNWs);(b)X-ray photoelectron spectroscopy for N1s of N-CNWs;(c)adsorption capacity of flavin mononucleotide(FMN,electro-biomolecules)and corresponding electrochemical response for N-CNWs varying with time;(d)polarization curves and power output of microbial fuel cells with control carbon electrode(black line),N-CNWs electrode with(red line)or without(blue line)immobilization of FMN molecules。