Graphene oxide reinforced core-shell structured Ag@CuO with tunable hierarchical morphologies and their morphology-dependent electrocatalytic properties for bio-sensing applications.

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ID: 54836
2018
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Abstract
In this study, a facile solution approach was developed for the synthesis of a series of core-shell structured Ag@CuO nanocrystals of various shapes including triangles, spheres, and cubes with well-defined stable heterojunctions. The electrooxidation of dopamine (DA), uric acid (UA), guanine (G), and adenine (A) using these hybrids revealed morphology-dependent sensing properties, with activities and accumulation ability following the order, triangular Ag@CuO > spherical Ag@CuO > cubic Ag@CuO. Further, we constructed a novel graphene oxide (GO) nanosheet-reinforced triangular Ag@CuO ternary hetero-nanostructure. Such a hybrid with a three-dimensional interconnected hierarchical architecture is suitable for catalysis, since it not only leads to improved interfacial electron transfer, but also readily exposes the highly catalytic Ag@CuO to the reactants. Therefore, more enhanced electrochemical activities were observed for the oxidation of DA, UA, G, and A. This study provides an efficient way to synthesize morphology-controlled Ag@CuO heterogeneous catalysts for the fabrication of potential biosensors, and also opens up attractive avenues in the design of multifunctional ternary noble metal-semiconductor-carbon hybrids.
Reference Key
gan2018graphenebiosensors Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gan, Tian;Wang, Zhikai;Shi, Zhaoxia;Zheng, Dongyun;Sun, Junyong;Liu, Yanming;
Journal Biosensors & bioelectronics
Year 2018
DOI
S0956-5663(18)30288-4
URL
Keywords
electrochemical sensor graphene oxide biomolecules ag cu(2)o morphology–dependent

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