کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7233313 | 1470968 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A fluorescent biosensor based on carbon dots-labeled oligodeoxyribonucleotide and graphene oxide for mercury (II) detection
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A fluorescent biosensor based on carbon dots-labeled oligodeoxyribonucleotide and graphene oxide for mercury (II) detection A fluorescent biosensor based on carbon dots-labeled oligodeoxyribonucleotide and graphene oxide for mercury (II) detection](/preview/png/7233313.png)
چکیده انگلیسی
As the newest two members of the carbon materials family, carbon dots (CDs) and graphene oxide (GO) possess many excellent optical properties resulting in a wide range of applications. In this work, we successfully synthesized CDs with a high-quantum-yield, and labeled them on oligodeoxyribonucleotide (ODN). The fluorescence of resultant CDs-labeled oligodeoxyribonucleotide (ODN-CDs) was quenched by GO via fluorescence resonance energy transfer. In the presence of Hg2+, the fluorescence was recovered by the release of ODN-CDs from GO due to the formation of T-Hg2+-T duplex. In the light of this theory, we designed a simple, highly sensitive and selective fluorometric Hg2+ sensor based on CDs-labeled oligodeoxyribonucleotide and GO without complicated, costly and time-consuming operations. Under the optimal conditions, a linear relationship was obtained between relative fluorescence intensity and the concentration of Hg2+ in the range of 5-200Â nM (R2=0.974). The present GO-based sensor system is highly selective toward Hg2+ over a wide range of metal ions and has a detection limit of 2.6Â nM. This method is reliable, and has been successfully applied for the detection of Hg2+ in practical samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 63, 15 January 2015, Pages 506-512
Journal: Biosensors and Bioelectronics - Volume 63, 15 January 2015, Pages 506-512
نویسندگان
Xin Cui, Lei Zhu, Jing Wu, Yu Hou, Peiyao Wang, Zhenni Wang, Mei Yang,