کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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868961 | 909817 | 2010 | 6 صفحه PDF | دانلود رایگان |
Sb-doped SnO2 nanowires were synthesized via thermal evaporation. Scanning electron microscopic, transmission electron microscopic, X-ray diffraction, current–voltage, and electrochemical impedance spectroscopy experiments have been used to characterize the structural and electrical behaviors of the nanowires. A mediator-free horseradish peroxidase-based H2O2 biosensor was constructed through the Sb-doped SnO2 nanowires used as the immobilization matrix for the enzymes. In comparison with the undoped SnO2 nanowires, Sb-doped SnO2 nanowires exhibited excellent electron transfer properties for the enzymes and higher electroactivity toward H2O2. The biosensors displayed good performance along with high sensitivity, wide linear range, and long-term stability. Those can be attributed to the enhanced carrier density arising from Sb doping and biocompatible microenvironment provided by the Sb-doped SnO2 nanowires. This study demonstrated that Sb-doped SnO2 nanowires were promising platform for the construction of mediator-free biosensors and provided new further fundamental insights into the study of nanoscience and nanodevices.
Journal: Biosensors and Bioelectronics - Volume 25, Issue 11, 15 July 2010, Pages 2436–2441