Abstract
Magnetic graphene composites (MGCs), which are composed of magnetic nanoparticles with graphene or its derivatives, played an important role in sensors development. Due to the enhanced electronic properties and the synergistic effect of magnetic nanomaterials and graphene, MGCs could be used to realize more efficient sensors such as chemical, biological, and electronic sensors, compared to their single component alone. In this review, we first reviewed the various routes for MGCs preparation. Then, sensors based on MGCs were discussed in different groups, including optical sensors, electrochemical sensors, and others. At the end of the paper, the challenges and opportunities for MGCs in sensors implementation are also discussed.
Highlights
As a star material, graphene has attracted much attention since its discovery in 2004 [1]
Chimezie et al reported an electrochemical sensor for As(III) determination with magnetic reduced graphene oxides composites modified screen-printed electrode [17]
Lin et al reported magnetic graphene oxide modified Au electrode for cancer diagnosis based on vascular endothelial growth factor (VEGF) determination [51]
Summary
Graphene has attracted much attention since its discovery in 2004 [1] This exciting two-dimensional (2D) material with single-atom-thick, exhibited several exceptional and unique physical and chemical properties, such as exceptional electrical conductivity, high specific surface area, and biocompatibility. Graphene was used to implement applications ranging from physical devices construction to sensor development and cancer theranostics in recent years [2]. The electrocatalysis activity of magnetic nanoparticles surface was used to develop signal-amplification sensors of small molecules (e.g., H2O2, Nicotinamide adenine dinucleotide (NADH) or O2) [4]. The marriage of graphene and magnetic nanoparticles could generate one new kind of hybrid material, magnetic graphene composites (MGCs), which show great potential in the construction of sensors [5]. We focus on the first four kinds of construction methods
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