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

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.

SUBMITTER: Kaye S

PROVIDER: S-EPMC5714651 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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

Kaye Savannah S Zeng Zheng Z Sanders Mollye M Chittur Krishnan K Koelle Paula M PM Lindquist Robert R Manne Upender U Lin Yongbin Y Wei Jianjun J

The Analyst 20170515 11

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- ...[more]

PMID: 28504795

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