Figure 5.
Amperometric responses ofthe bare GCE (a″), theAuNPs-Ch/GCE(b″), the EGR-AuNPs-Ch/GCE (c″) and Nafion/Tyr/EGR-AuNPs-Ch/GCE (d″) at −0.10 V (vs. SCE) upon successive addition of the same concentration of CA.
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