A novel non-enzymatic glucose sensor based on Cu nanoparticle modified graphene sheets electrode

Ordered assemblies of silver nanoparticles on carbon nitride sheets and their application in the non-enzymatic sensing of hydrogen peroxide and glucose

A facile fabrication of an ordered assembly of silver nanoparticles on carbon nitride sheets is reported. A modified glassy carbon electrode with carbon nitride sheets doped with silver nanoparticles can be used as a sensitive electrochemical sensor for hydrogen peroxide and glucose.

Preparation of reduced graphene oxide/Cu nanoparticle composites through electrophoretic deposition: application for nonenzymatic glucose sensing

The paper reports on the simultaneous reduction/deposition of thin films of rGO/Cu NPs from an ethanol solution of GO and CuSO₄ using EPD technique. The electrocatalytic properties of the electrode were exploited for non-enzymatic glucose sensing.

A novel non-enzymatic amperometric glucose sensor based on a hollow Pt–Ni alloy nanotube array electrode with enhanced sensitivity

A non-enzymatic electrode is proposed as a glucose sensor based on Pt-replaced Ni nanowires which are prepared by constant current electro-deposition within the anodic alumina membrane and galvanic replacement reaction.

A feasible approach to synthesize Cu2O microcrystals and their enhanced non-enzymatic sensor performance

This work provides a green and feasible approach to obtain a “clean surface” Cu₂O with enhanced glucose sensor performance.

Special nanostructure control of ethanol sensing characteristics based on Au@In2O3 sensor with good selectivity and rapid response

A Au@In₂O₃ core–shell nanostructure was prepared via a sol–gel method firstly. The Au@In₂O₃ sensor showed rapid response and perfect selectivity to ethanol.

Binder free and free-standing electrospun membrane architecture for sensitive and selective non-enzymatic glucose sensors

Novel free standing and binder free non-enzymatic electrochemical sensors were fabricated using in situ grown copper (Cu) nanoparticles on polyvinylidenefluoride-co-hexafluoropropylene (PVdF-HFP) nanofibers.

Preparation of Ni(OH)2 nanosheets on Ni foam via a direct precipitation method for a highly sensitive non-enzymatic glucose sensor

Ni(OH)₂ nanosheets on Ni foam was prepared by the direct precipitation method. This electrode shows high sensitivity with 1130 μA mM⁻¹ cm⁻² at the glucose concentration range of 2 μM to 40 μM and 1097 μA mM⁻¹ cm⁻² at the range of 0.1 mM to 2.5 mM.

A robust enzymeless glucose sensor based on CuO nanoseed modified electrodes

CuO nanoseeds were synthesized via a low-temperature aqueous route, for the fabrication of a robust enzymeless glucose sensor.

A highly sensitive enzymeless glucose sensor based on 3D graphene–Cu hybrid electrodes

We report a facile route to prepare the hybrid structure of 3 dimensional (3D) graphene and Cu and its uses for ultrahigh performance in enzymeless glucose detection.

Dispersed gold nanoparticles on NiO coated with polypyrrole for non-enzymic amperometric sensing of glucose

Schematic illustration for the preparation of NiO@PPy/Au electrode.

Ni–Co alloy nanostructures anchored on mesoporous silica nanoparticles for non-enzymatic glucose sensor applications

Uniform sized Ni–Co alloy nanoparticles were effectively confined over the active channels of mesoporous silica nanoparticles (MSN) using a simple chemical reduction method, and the resultant nanostructures exhibited a spherical configuration with a mean diameter of 5 nm.

Graphene oxide doped poly(3,4-ethylenedioxythiophene) modified with copper nanoparticles for high performance nonenzymatic sensing of glucose

A highly sensitive and stable nonenzymatic glucose sensor was developed through the electrochemical deposition of Cu nanoparticles onto an electrodeposited nanocomposite of conducting polymer PEDOT doped with graphene oxide.

Facile preparation of nanostructured copper-coated carbon microelectrodes for amperometric sensing of carbohydrates

We report a novel method for fabricating nanostructured copper-coated carbon cylindrical fiber microelectrodes with high efficiency in carbohydrate non-enzymatic and label-free amperometric sensing in batch and flow-detection arrangements.

Graphene nanosheets as a sensing platform for amplified electrochemical measurement of quercetin and uric acid in biological fluids

A simple and selective electrochemical method was investigated for the simultaneous determination of quercetin (Qu) and uric acid (UA) in aqueous media (citrate buffer solution, pH 4.0) on a glassy carbon electrode modified with graphene nanosheets as a sensing platform (GNSs/GCE). Cyclic voltammetry, transmission electron microscopy, and Fourier transform infrared spectroscopy were employed to characterize the nanostructure of the sensor. Separation of the oxidation peak potentials for Qu and UA was about 160 mV, and the anodic currents for the oxidation of both Qu and UA are greatly increased at GNSs/GCE, which makes it suitable for simultaneous determination of these compounds. The detection limits were 0.0011 and 0.0137 μmol/L for Qu and UA, respectively. The method was applied to the determination of Qu and UA in human blood serum and urine samples.

Direct electrochemical synthesis of reduced graphene oxide (rGO)/copper composite films and their electrical/electroactive properties

Electrical contact materials with excellent performances are crucial for the development and safe use of electrical contacts in different applications. In our work, reduced graphene oxide (rGO)/copper (Cu) composite films, as potential electrical contact materials, have been synthesized on copper foil with one-step electrochemical reduction deposition method. Cyclic voltammetry (CV) was used to define the deposition conditions, and confocal Raman microscopy (CRM), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to characterize the chemical compositions, molecular and micro- and nano-structures of the composite films. Atomic force microscopy/scanning Kelvin probe force microscopy (AFM/SKPFM), conductive AFM (C-AFM) as well as impedance analysis were employed to evaluate the electroactive/electrical properties of the prepared composite films, respectively. The CRM and XPS results suggest that the rGO/Cu composite films can be synthesized through one-step electrochemical codeposition using suitable precursor solutions. Within a short deposition period, the growth of discrete nanograins in the composite film predominates, whereas pine-tree-leaf nanostructures are formed in the composite film when the deposition period is long, due to the chelating role of GO or rGO to regulate the growth rate of metallic copper nanograins. The electrical resistivity of the composite films is lower than the polished Cu foil and the electrodeposited Cu film, probably due to the higher conductivity (enhanced transfer of charge carriers) of the rGO incorporated in the composite films. The Volta potential variation in the rGO/Cu composite film is quite different from that in the electrodeposited Cu film. The electroactivity of the rGO/Cu composite films is higher than the electrodeposited Cu film, but lower than polished Cu foil, and the underlying mechanisms have been discussed.

In situ green synthesis of Au nanoparticles onto polydopamine-functionalized graphene for catalytic reduction of nitrophenol

A simple and green route was demonstrated to prepare graphene/Au NPs nanocomposite using polydopamine as surface modifier, reducing agent and stabilizer simultaneously, which exhibits remarkable catalytic activity for the reduction of 4-nitrophenol.

Sensitive sugar detection using 4-aminophenylboronic acid modified graphene

A sensitive electrochemical active interface for sugar sensing based on the specific boronic acid-diol binding was established. The sensing matrix was formed by stirring a suspension of graphene oxide (GO) with 4-aminophenylboronic acid (APBA). The resulting composite consists of a water insoluble precipitate of reduced graphene oxide (rGO) with APBA incorporated into the rGO matrix. Differential pulse voltammetry (DPV) on glassy carbon electrodes modified with rGO/APBA was used for the detection of fructose, mannose and glucose. The fabricated sensor exhibited a wide linear range with detection limits of 100 nM for fructose, and around 800 nM for mannose and glucose.