کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5357070 | 1503655 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly sensitive DNA sensor based on polypyrrole nanowire
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper describes the development of a DNA sensor based on polypyrrole nanowire. By using potentiostatic technique, in the presence of gelatin as the soft mold, the polypyrrole nanowires were synthesized on the surface of the micro-sensor. The surface enhanced Raman spectroscopy shows that the NH ends of the polypyrrole nanowires orientate upward from the surface facilitating the DNA probe immobilization through the simple linkage with the phosphate groups of the probe DNA. The label-free signal readout was carried out by lock-in amplifier technique. The response time of the DNA sensor is 10Â s and the measurement time was 5Â min. The lowest detectable concentration of Escherichia coli DNA was 0.1Â nM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 309, 1 August 2014, Pages 285-289
Journal: Applied Surface Science - Volume 309, 1 August 2014, Pages 285-289
نویسندگان
Mai Anh Tuan, Duc Thanh Pham, Thi Xuan Chu, Nguyen Minh Hieu, Nguyen Hoang Hai,