کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6661536 | 1426551 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An electrochemical biosensor based on Au nanoparticles decorated reduced graphene oxide for sensitively detecting of Hg2+
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The present work describes an electrochemical Hg2+ ion biosensor which used Au nanoparticles decorated reduced graphene oxide (Au NPs-RGO) for generating electrochemical signal as indicator involving. Hg2+ ions specifically captured two thymine bases (T) of DNA probe to form T-Hg2+-T stable base pairs, therefore, Hg2+ ion solution induced the structure of Au NPs-RGO modified thiol-functionalized DNA probe from single-strand to hairpin. The DNA 1 modified on Au electrode is complementary with Au NPs-RGO modified single-stranded DNA probe. Therefore, the amount of Au NPs-RGO adsorbed on electrode is decreased when the concentrations of Hg2+ ions increase. The current response of the fabricated biosensor is monitored on ferricyanide system, which exhibits a wide linear range of 0-2000â¯nM and a high selectivity towards Hg2+ ion. Besides, there are no co-factors used in the process of fabricating biosensor. Moreover, the biosensor is applied for detecting Hg2+ ions in water sample with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 824, 1 September 2018, Pages 201-206
Journal: Journal of Electroanalytical Chemistry - Volume 824, 1 September 2018, Pages 201-206
نویسندگان
Yanyan Zhang, Guanglei Chu, Yemin Guo, Wenping Zhao, Qingqing Yang, Xia Sun,