Label-free detection of DNA hybridization with a compact LSPR-based fiber-optic sensor.

Label-free detection of DNA hybridization with a compact LSPR-based fiber-optic sensor.
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DOI:
10.1039/c7an00249a
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发表时间:
2017-06-07
期刊:
The Analyst
影响因子:
--
通讯作者:
Wei J
Wei J
中科院分区:
其他
文献类型:
--
作者:
Kaye S;Zeng Z;Sanders M;Chittur K;Koelle PM;Lindquist R;Manne U;Lin Y;Wei J

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已经证明了一种小型化的、鲁棒的、局部表面等离子体共振(LSPR)耦合的光纤(FO)纳米探针,其提供了用于检测DNA杂交和测量DNA浓度的集成和便携式解决方案。FO纳米探针是通过利用纳米纤维技术(包括电子束光刻和剥离工艺)在光纤的端面上构建金属纳米结构阵列来创建的。LSPR-FO纳米探针设备提供了对水中单链DNA的实时、无标记和低样本量定量,具有高灵敏度和选择性,检测限约为10 fM。这些结果证明了LSPR-FO纳米探针装置作为用于检测短链DNA的紧凑且低成本的生物传感器的可行性。
A miniaturized, robust, localized surface plasmon resonance (LSPR)-coupled fiber-optic (FO) nanoprobe providing an integrated and portable solution for detection of DNA hybridization and measurement of DNA concentrations has been demonstrated. The FO nanoprobe was created by constructing arrays of metallic nanostructures on the end facets of optical fibers utilizing nanofabrication technologies, including electron beam lithography and lift-off processes. The LSPR-FO nanoprobe device offers real-time, label-free, and low-sample-volume quantification of single-strand DNA in water with high sensitivity and selectivity, achieving a limit of detection around 10 fM. These results demonstrate the feasibility of the LSPR-FO nanoprobe device as a compact and low-cost biosensor for detection of short-strand DNA.
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期刊: NANO LETTERS
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