期刊
ANALYTICAL METHODS
卷 5, 期 20, 页码 5555-5559出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ay41146j
关键词
-
资金
- National Natural Science Foundation of China (NSC) [21035005]
- National Basic Research Program of China (973 Program) [2011CB933600]
In this paper, a new approach for respiratory syncytial virus (RSV) gene sequence detection was described based on the fluorescence resonance energy transfer (FRET) from oligonucleotide-templated silver nanoclusters (DNA-AgNCs) to multi-walled carbon nanotubes (MWCNTs). The specific DNA scaffold combines two fragments: one is enriched with a cytosine sequence fragment (C-12) that can result in DNA-AgNCs with a high quantum yield via a chemical reduction method, and the other is the probe fragment (5'-AAA AAT GGG GCA AAT A-3') which can selectively bind to the gene for RSV. Thus, the as-prepared AgNCs can exhibit enhanced fluorescence when binding to the target DNA sequence and forming a double helix. Because of the introduction of MWCNTs, which can quench the fluorescence of the DNA-AgNCs with an extraordinarily high quenching efficiency (85.8%), a relatively high signal-to-background ratio was achieved. The fluorescence ratio of the DNA-AgNCs was enhanced in a linearly proportional manner to the concentration of the target in the range of 31.25 nM to 2.00 mu M with a detection limit (3 sigma) of 24.00 nM.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据