Fig. 9From: The recent advancements in the early detection of cancer biomarkers by DNAzyme-assisted aptasensorsa A sandwich-type detection of CEA based on GQD/AuNPs/DNAzyme aptasensor; b The scheme of exosomes biomarkers detection based on the label-free DNAzyme-assisted electrochemical aptasensor. Reproduced with permission from [106] and [107]Back to article page