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. 2017 May 5;17(5):1041. doi: 10.3390/s17051041

Figure 5.

Figure 5

Schematic illustration of sandwich-type electrochemical immunosensor and nanocatalyst-based assay principle: CNT-AuNP-anti-AFP (left) and AuNP-anti-AFP (right). Reproduced with permission from reference [79]. Copyright 2016 Elsevier.