کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189247 | 1381180 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polyelectrolyte platform for sensitive detection of biological analytes via reversible fluorescence quenching
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Non-conjugated polyelectrolytes were used to quench oppositely charged fluorescent dye-ligand conjugate (DLC) molecules by bringing them to the vicinity of the polyelectrolyte backbone to form aggregates and hence quench the dye fluorescence. As target protein molecules are added to the solution, the specific interaction between the DLC and the protein disrupts the aggregate structure, thus recovering the luminescence. The binding of DLC to oppositely charged polyelectrolyte and the disruption of the aggregates are investigated by fluorescence spectroscopy. The static-quenching mechanism is clearly manifested in the Stern-Volmer plots that show the decrease in slope with increasing temperature. This polyelectrolyte-based sensing platform has a sensitivity of <100Â pM. We also show the selectivity of this platform by comparing the fluorescence recovery between two proteins (avidin and bovine serum albumin) with similar molecular weight. Our results suggest a highly sensitive approach for detecting biological analytes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 48, Issue 26, 13 December 2007, Pages 7582-7589
Journal: Polymer - Volume 48, Issue 26, 13 December 2007, Pages 7582-7589
نویسندگان
Michael J. O'Connell, Candace K. Chan, Wenguang Li, Raea K. Hicks, Stephen K. Doorn, Hsing-Lin Wang,