Size-tunable Pt nanoparticles assembled on functionalized ordered mesoporous carbon for the simultaneous and on-line detection of glucose and L-lactate in brain microdialysate

► A CMM based dual biosensor was constructed for the first time. ► Pt NPs were assembled on PDDA-functionalized CMM via electrostatic interaction. ► Glucose and L-lactate in microdialysate of rats were simultaneously determined.