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

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Abstract

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.

Graphical abstract: Label-free detection of DNA hybridization with a compact LSPR-based fiber-optic sensor

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Publication details

The article was received on 11 Feb 2017, accepted on 21 Apr 2017 and first published on 25 Apr 2017


Article type: Paper
DOI: 10.1039/C7AN00249A
Citation: Analyst, 2017, Advance Article
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    Label-free detection of DNA hybridization with a compact LSPR-based fiber-optic sensor

    S. Kaye, Z. Zeng, M. Sanders, K. Chittur, P. M. Koelle, R. Lindquist, U. Manne, Y. Lin and J. Wei, Analyst, 2017, Advance Article , DOI: 10.1039/C7AN00249A

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