Scheme 1From: Microporous PdCuB nanotag-based electrochemical aptasensor with Au@CuCl2 nanowires interface for ultrasensitive detection of PD-L1-positive exosomes in the serum of lung cancer patientsIllustration of the sandwich electrochemical aptasensor for PD-L1+ exosome analysis. A Procedure for electrochemical detection of PD-L1+ exosomes in clinical serum. B Assembly of electrochemical aptasensor and exosome detection processBack to article page