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Electrochemical mediatorless detection of norepinephrine based on MoO3 nanowires

Title
Electrochemical mediatorless detection of norepinephrine based on MoO3 nanowires
Authors
Samdani, Kunda J.Joh, Dong WooRath, Manas K.Lee, Kang Taek
DGIST Authors
Samdani, Kunda J.; Joh, Dong Woo; Rath, Manas K.; Lee, Kang Taek
Issue Date
2017
Citation
Electrochimica Acta, 252, 268-274
Type
Article
Article Type
Article
Keywords
Ascorbic-AcidBio-ElectrochemicalBiosensorsCarbonCarbon NanotubeCatalyst ActivityChemical DetectionChemiluminescence DetectionChronoamperometryChronoamperometry TechniquesCyclic VoltammetryDeterminationDirect Electron TransferElectrocatalytic OxidationElectrochemical BiosensorElectrochemical DetectionElectrodesElectron Transport PropertiesEpinephrineFolic-AcidGlass Membrane ElectrodesGlassy Carbon ElectrodesHeterogeneous Rate ConstantLiquid-ChromatographyMediatorlessMediator-LessMolybdenum OxideMoO3 NanowiresNanotube Paste ElectrodeNanowiresNorepinephrineRate ConstantsSensorVoltammetric
ISSN
0013-4686
Abstract
Achieving direct electron transfer between a biomolecule and modified electrodes is paramount for fabricating advanced biosensor devices. In this report, 1-dimensional (1D) MoO3 nanowires (NWs) were synthesized in a systematic growth evolution study. These MoO3 NWs, with the glassy carbon electrodes (GCEs), were further used as a mediatorless biosensor electrode for the detection of norepinephrine (NE) by cyclic voltammetry and chronoamperometry techniques. The MoO3 NWs/GCE had a magnificent response time of 2 s in the electrochemical detection of NE, with a detection limit of 0.11 μM. This excellent bio-electrochemical performance is attributed to its high catalytic activity and 1D microstructure, providing a path for electron transport and increasing their sensitivity. The MoO3 NWs/GCE also had a promising diffusion constant (D) value of 3.34 × 10−5 cm2/s and a heterogeneous rate constant (k) of 8.03 × 10−4 cm/s. The modified electrode possessed high stability, reproducibility, and selectivity. © 2017 Elsevier Ltd
URI
http://hdl.handle.net/20.500.11750/4552
DOI
10.1016/j.electacta.2017.08.187
Publisher
Elsevier Ltd
Related Researcher
  • Author Lee, Kang Taek Advanced Energy Conversion and Storage Lab(AECSL)
  • Research Interests
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles
ETC1. Journal Articles


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