Mesoporous silica (MCM-41)-Fe2O3 as a novel magnetic nanosensor for determination of trace amounts of amino acids

[Display omitted] ► Electrooxidation of amino acids was performed using MCM-41-Fe3O4. ► Modified electrode shows new advantages as an amino acids sensor. ► Excellent electrocatalytic activity was obtained for amino acids oxidation. ► The response of the modified electrode is linear over the entire 1...

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Bibliographic Details
Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2013-08, Vol.108, p.52-59
Main Authors: Hasanzadeh, Mohammad, Shadjou, Nasrin, Omidinia, Eskandar
Format: Article
Language:English
Subjects:
Amino acid
amino acids
Amino Acids - analysis
Carbon - chemistry
catalytic activity
colloids
Electrochemical Techniques
electrochemistry
Electrodes
Ferric Compounds - chemistry
ferric oxide
Flow injection
flow injection analysis
glassy carbon electrode
Hydrodynamic amperometry
hydrodynamics
Magnets
MCM-41-Fe2O3
Mesoporous
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Microscopy, Electron, Transmission
nanoparticles
nitrogen
Oxidation-Reduction
Porosity
silica
Silicon Dioxide - chemistry
surface area
Surface Properties
transmission electron microscopy
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Summary:[Display omitted] ► Electrooxidation of amino acids was performed using MCM-41-Fe3O4. ► Modified electrode shows new advantages as an amino acids sensor. ► Excellent electrocatalytic activity was obtained for amino acids oxidation. ► The response of the modified electrode is linear over the entire 100–1000nM. Magnetic (Fe2O3) mobile crystalline material-41 (MCM-41) was prepared and characterized using transmission electron microscopy (TEM) and nitrogen adsorption–desorption techniques. Due to the large surface area (1213 m2g−1) and remarkable electrocatalytic properties of MCM-41-Fe2O3, the MCM-41-Fe2O3 modified glassy carbon electrode (MCM-41-Fe2O3/GCE) exhibits potent electrocatalytic activity toward the electro-oxidation of amino acids. MCM-41-Fe2O3/GCE brings new capabilities for electrochemical sensing by combining the advantages of Fe2O3 magnetic nanoparticles and MCM-41 with very large surface area. Cyclic voltammetry, hydrodynamic amperometry and flow injection analysis used to determination of amino acids at higher concentration range. Fast response time, excellent catalytic activity, and ease of preparation are the advantages of the proposed amino acid sensor.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2013.02.015