کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1182516 1491634 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relationship Between Surface Morphology and Performance of a Spirally Hierarchical Structure-based Electrochemical Glucose Sensor
ترجمه فارسی عنوان
رابطه بین مورفولوژی سطح و عملکرد یک سنسور الکتروشیمیایی مبتنی بر ساختار سلولی سلول سلولی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی

A spirally hierarchical structure-based glucose enzymatic electrode was prepared in the experiment on the basis of that zinc oxide nanowires were hydrothermally synthesized on the surface of an Au cylindrical spiral formed by manually winding an Au fiber around an optical fiber core, and then glucose oxidase was immobilized on these nanowires by physical adsorption. The surface morphologies of the spirally hierarchical structures and corresponding enzymatic electrodes were extracted, and the electrochemical performances of the enzymatic electrodes were characterized. The results indicated that the synthesizing parameters of zinc oxide nanowires affected significantly the surface morphologies of the glucose oxidase immobilization on the spirally hierarchical structures, and the performances of related glucose sensors. As the Zn2+ concentration of growth solution was set at 25 mM, the surface morphology was determined as roughness to be 0.10 μm and correlation length 0.29 μm, resulting in a better immobilization of glucose oxidase upon zinc oxide nanowires. In this case, the sensitivity of the glucose sensor was determined to be 2.15 μA mM−1 cm−2, the linear range was 0–4.50 mM, the low detection limit was 9.20 μM and Michaelis-Menten constant was 3.68 mM. The results not only benefited the batch production of the spirally hierarchical structure-based enzymatic electrodes, but also significantly improved the performances of the glucose sensors.

Zn2+ concentration of the growth solution affects significantly the surface morphologies of ZnO nanowire-based spirally hierarchical structures, further the GOD immobilization of the spirally hierarchical structure-based working electrodes, and eventually the performances of corresponding glucose sensors.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Analytical Chemistry - Volume 42, Issue 8, August 2014, Pages 1077–1082
نویسندگان
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