کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10561404 | 969771 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modified graphitized carbon black as transducing material for reagentless H2O2 and enzyme sensors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modified graphitized carbon black as transducing material for reagentless H2O2 and enzyme sensors Modified graphitized carbon black as transducing material for reagentless H2O2 and enzyme sensors](/preview/png/10561404.png)
چکیده انگلیسی
Direct electron transfer between redox enzymes and electrodes is the basis for the third generation biosensors. We established direct electron transfer between quinohemoprotein alcohol dehydrogenase (PQQ-ADH) and modified carbon black (CBs) electrodes. Furthermore, for the first time, this phenomenon was observed for pyrroloquinoline quinone (PQQ)-dependent glucose dehydrogenase (PQQ-GDH). Reagentless enzyme biosensors suitable for the determination of ethanol, glucose and sensors for hydrogen peroxide were designed using CB electrodes and screen-printing technique. Aiming to create an optimal transducing material for biosensors, a set of CB batches was synthesized using the matrix of Plackett-Burman experimental design. Depending on the obtained surface functional groups as well as the nano-scale carbon structures in CBs batches, the maximal direct electron transfer current of glucose and ethanol biosensors can vary from 20 to 300Â nA and from 30 to 6300Â nA for glucose and ethanol, respectively. Using modified CB electrodes, an electrocatalytic oxidation of H2O2 takes place at more negative potentials (0.1-0.4Â V versus Ag/AgCl). Moreover, H2O2 oxidation efficiency depends on the amount and morphology of fine fraction in the modified CBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 67, Issue 4, 15 October 2005, Pages 783-790
Journal: Talanta - Volume 67, Issue 4, 15 October 2005, Pages 783-790
نویسندگان
Julija Razumiene, Jurgis Barkauskas, Virgaudas Kubilius, Rolandas MeÅ¡kys, Valdas LaurinaviÄius,