Fig. 4From: Electrochemical aptasensor based on the engineered core-shell MOF nanostructures for the detection of tumor antigensReprinted with permission from Ref. [177], copyright 2019, ElsevierSchematic illustration of core-shell bimetallic TbFe-MOF for the immobilization of the aptamer strands for concurrently sensing CA-125 and living cancer cells [177].Back to article page