Highly sensitive determination of epinephrine by a MnO2/Nafion modified glassy carbon electrode

Facile Synthesis of ZnMn2O4@rGO Microspheres for Ultrasensitive Electrochemical Detection of Hydrogen Peroxide from Human Breast Cancer Cells

“…Nevertheless, the instability, complexity of immobilization, and high cost restrict their usages. In comparison with enzyme-based biosensors, nonenzymatic sensors based on transition-metal oxides have achieved increasing interest, including NiFe 2 O 4 , MnO 2 , ZnO, Cu 2 O/Cu, and Fe 3 O 4 . Among them, mixed transition-metal oxides possess higher electrochemical performance than monocomponent metal oxides due to their great flexibility of the structure, excellent electrochemical capacitance, and low costs. − Balasubramanian et al reported a solvothermal technique to synthesize Mn 2 CuO 4 microspheres.…”

NiFe2O4nanoparticles decorated with MWCNTs as a selective and sensitive electrochemical sensor for the determination of epinephrine using differential pulse voltammetry

“…24 Several methods for the determination of epinephrine have been reported, including high performance liquid chromatography (HPLC), 25,26 HPLC-mass spectrometry, 27 uorimetry, 28 HPLC-optical ber biosensor, 29 capillary electrophoresis, 30,31 ow injection, 32,33 HPLC with uorimetric detection, 34 chemiluminescence, 35,36 spectrophotometry 37,38 and electrochemical methods. [39][40][41][42][43][44][45][46] Electrochemical techniques are suitable for the detection of epinephrine due to their sensitivity, rapidity, accuracy, and low cost. For these reasons, different modied electrodes have been introduced for the detection of epinephrine, including gold electrode, 42 ionic liquid-modied carbon nanotubes paste electrode, 43 MnO 2 -Naon-modied glassy carbon electrode, 44 glassy carbon electrode modied with carbon ber ultra microelectrode, 45 and graphene/gold nanocomposite modied-glassy carbon electrode.…”

“…[39][40][41][42][43][44][45][46] Electrochemical techniques are suitable for the detection of epinephrine due to their sensitivity, rapidity, accuracy, and low cost. For these reasons, different modied electrodes have been introduced for the detection of epinephrine, including gold electrode, 42 ionic liquid-modied carbon nanotubes paste electrode, 43 MnO 2 -Naon-modied glassy carbon electrode, 44 glassy carbon electrode modied with carbon ber ultra microelectrode, 45 and graphene/gold nanocomposite modied-glassy carbon electrode. 46 Nanoparticles based on transition metals oxides 44 and/or spinel ferrite nanoparticles with a chemical formula of MFe 2 O 4 are good candidates 20 to develop electrochemical sensors for the detection of important biological compounds.…”

Sensitive detection of extracellular hydrogen peroxide using plasmon-enhanced electrochemical activity on Pd-tipped Au nanobipyramids

“…Up to now, various techniques have been developed for detecting H 2 O 2 , including colorimetric methods, 7,8 fluorescence, 9,10 chemiluminescence, 11,12 and electrochemistry sensing. 13–30 Electrochemical techniques have gained significant interest in bioanalysis due to their fast response, high sensitivity, simplicity, and low cost. 15 Many electrochemical sensors have been developed for the detection of H 2 O 2 secreted from living cells.…”