Silver nanocluster based sensitivity amplification of a quartz crystal microbalance gene sensor
Silver nanocluster based sensitivity amplification of a quartz crystal microbalance gene sensor
复制标题
基于银纳米簇的石英晶体微天平基因传感器的灵敏度放大
DOI:
10.1007/s00604-015-1728-9
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发表时间:
2016-02
影响因子:
5.7
通讯作者:
Cai Jiye
中科院分区:
文献类型:
--
作者:
Zhou Lin;Lu Peng;Zhu Mingyao;Li Baole;Yang Peihui;Cai Jiye
The article describes a quartz crystal microbalance (QCM) biosensor for the determination of nucleic acids via a DNA-templated assembly of silver nanoclusters (AgNCs) which represents a novel way for efficient signal amplification. A QCM was modified with probe DNA to specifically capture target DNA. Then, DNA-templated AgNCs were assembled to enhance the sensitivity of the QCM sensor via Ag(I) ions attached to the DNA skeleton, this followed by hydroquinone-induced reductive formation of the AgNCs. TEM and AFM were used to further confirm the formation of DNA-templated AgNCs. The results showed that frequency response of QCM sensor is up to 87 times larger when using this mode of amplification. A linear relationship was obtained between the frequency response and DNA concentration over the 0.6 to 130 nM range, with a 0.1 nM detection limit. In our perception, this scheme for improved sensitivity provides a straightforward and widely applicable tool for sensing DNA.Graphical AbstractA novel quartz crystal microbalance biosensor was developed for highly sensitive and label-free detection of nucleic acid through DNA-templated assembly of silver nanoclusters as an efficient signal amplifier.
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影响因子:
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通讯作者:
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影响因子:
64.8
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影响因子:
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通讯作者:
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