کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7148359 | 1462102 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Single-enzyme nanoparticles based urea biosensor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Single-enzyme nanoparticles (SENs) with excellent activity and stability were successfully fabricated via the surface modification and in situ aqueous polymerization of separate urease molecule. A novel piezoelectric biosensor was developed for urea determination based on SENs immobilization onto nanoporous alumina membranes prepared by electrical anodization. The process of SENs immobilization was optimized and the performance of the developed urea biosensor was evaluated. The high selectivity, shorter response time (12 s), wider linear range (0.08 μM-1 mM) and lower limit of detection (LOD, 0.05 μM) were observed for the present biosensor. Moreover, a stability study showed a very high stability over time for the frequency response of the biosensor with separated porous alumina/SENs electrode, testifying for the protective nature of the nanoporous alumina membranes and the interest of SENs. The clinical analysis of the urea biosensor confirmed the feasibility of urea determination in urine sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 188, November 2013, Pages 313-317
Journal: Sensors and Actuators B: Chemical - Volume 188, November 2013, Pages 313-317
نویسندگان
Zhengpeng Yang, Chunjing Zhang,