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Reference type: Journal
Authors: Jin H, Guo HJ, Gao XH, Gui RJ
Article Title: Selective and sensitive electrochemical sensing of gastrodin based on nickel foam modified with reduced graphene oxide/silver nanoparticles complex-encapsulated molecularly imprinted polymers.
Publication date: 2018
Journal: Sensors and Actuators B: Chemical
Volume: 277
Page numbers: 14-21.
DOI: 10.1016/j.snb.2018.08.156
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0925400518315946

Abstract: In this work, a facile one-step electrochemical coreduction method was developed to synthesize reduced graphene oxide (rGO) and silver nanoparticles (AgNPs) onto the surface of nickel foam (NF). Using graphene oxide and Ag(NH3)2OH as precursors, rGO and AgNPs were co-deposited on NF surface. The rGO-AgNPs modified NF was covered with molecularly imprinted polymers (MIPs) through in-situ electro-polymerization of pyrrole in the presence of gastrodin (GAS). After the elution of templated GAS molecules, poly(pyrrole)-based MIPs were covered on the surface of rGO-AgNPs modified NF to form MIPs/rGO-AgNPs/NF system. The system as a novel working electrode exhibited sensitive and selective electrochemical signal responses towards GAS. Under optimal conditions, MIPs/rGO-AgNPs/NF had a nearly linear relationship between the oxidation current peak intensities and GAS concentration in the range of 0.01-1 μM (R2 = 0.9919), with a low limit of detection of 1 nM. MIPs/rGO-AgNPs/NF was used as a novel MIPs electrochemical GAS sensor that showed an excellent capability of GAS detection, over potential interferents. In human serum samples, the detection of GAS based on this sensor had high detection stability and recovery. Experimental results demonstrated a high feasibility of MIPs/rGO-AgNPs/NF for GAS detection in real samples
Template and target information: gastrodin, GAS
Author keywords: Molecularly imprinted polymers, Gastrodin, electrochemical sensors, Nickel foam

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