title: Mesoporous silica (MCM-41)-Fe2O3 as a novel magnetic nanosensor for determination of trace amounts of amino acids.
abstract: 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 m(2)g(-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.
authors.affiliation: Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran. mhmmd_hasanzadeh@yahoo.com
authors.forename: Mohammad
authors.initials: M
authors.lastname: Hasanzadeh
authors.forename: Nasrin
authors.initials: N
authors.lastname: Shadjou
authors.forename: Eskandar
authors.initials: E
authors.lastname: Omidinia
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*; D059346:Magnets; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000596:Amino Acids; D005290:Ferric Compounds; C509968:MCM-41; C000499:ferric oxide; D002244:Carbon; D012822:Silicon Dioxide