Iron selenide thin film: Peroxidase-like behavior, glucose detection and amperometric sensing of hydrogen peroxide

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• 作者：Amit Kumar Dutta ; Swarup Kumar Maji ; Anup Mondal ; Basudeb Karmakar ; Papu Biswas ; Bibhutosh Adhikary
• 关键词：Iron selenide thin film ; Peroxidase mimic ; Hydrogen peroxide ; Glucose detection ; Amperometric sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：173
• 期：Complete
• 页码：724-731
• 全文大小：1206 K

文摘

Iron selenide (FeSe) thin film was deposited on glass or indium doped tin oxide (ITO) coated glass substrates through chemical bath deposition process from a precursor complex, [Fe₃(¦Ì₃-O)(¦Ì₂-O₂CCH₂Cl)₆(H₂O)₃]NO₃¡¤H₂O and was characterized by X-ray diffraction, field emission scanning electron microscopy and UV-vis spectroscopic techniques. Structural analyses revealed that the FeSe film had spherical morphology with average diameter of 30 nm. The film was shown to possess peroxidase-like catalytic activity toward oxidation of 3,3¡ä,5,5¡ä-tetramethylbenzidine (TMB) in the presence of H₂O₂ and followed Michaelis-Menten kinetics. It was exploited as a simple and cheap material in selective colorimetric method for detection and estimation of glucose in buffer solution. It gave a linear response to glucose over the concentration range from 2 ¡Á 10^?6 to 3 ¡Á 10^?5 M with a detection limit of 5 ¡Á 10^?7 M. Furthermore, the FeSe film, deposited on ITO, performed as good amperometric sensors for detection of H₂O₂. To compare the catalytic and sensing efficiency of the FeSe film, we have also prepared FeS film under similar conditions.