Fabrication of an Electrochemical  L ‐Cysteine Sensor Based on Graphene Nanosheets Decorated Manganese Oxide Nanocomposite Modified Glassy Carbon Electrode | Zendy

Majd Samira Mansouri | Zendy; Teymourian Hazhir | Zendy; Salimi Abdollah | Zendy

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Fabrication of an Electrochemical L ‐Cysteine Sensor Based on Graphene Nanosheets Decorated Manganese Oxide Nanocomposite Modified Glassy Carbon Electrode

Author(s) -

Majd Samira Mansouri,

Teymourian Hazhir,

Salimi Abdollah

Publication year - 2013

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201300245

Subject(s) - graphene , amperometry , electrode , nanocomposite , glassy carbon , materials science , oxide , electrochemical gas sensor , electrochemistry , detection limit , reference electrode , chemical engineering , working electrode , nanoparticle , inorganic chemistry , nanotechnology , cyclic voltammetry , chemistry , metallurgy , chromatography , engineering

The graphene nanosheets/manganese oxide nanoparticles modified glassy carbon electrode (GC/GNSs/MnOx) was simply prepared by casting a thin film of GNSs on the GC electrode surface, followed by performing electrodeposition of MnOx at applied constant potential. The GC/GNSs/MnOx modified electrode shows high catalytic activity toward oxidation of L ‐cysteine. Hydrodynamic amperometry determination of L ‐cysteine gave linear responses over a concentration range up to 120 µM with a detection limit of 75 nM and sensitivity of 27 nA µM −1 . The GC/GNSs/MnOx electrode appears to be a highly efficient platform for the development of sensitive, stable and reproducible L ‐cysteine electrochemical sensors.

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