|
1
|
Kaye S, Zeng Z, Sanders M, Chittur K, Koelle PM, Lindquist R, Manne U, Lin Y, Wei J. Label-free detection of DNA hybridization with a compact LSPR-based fiber-optic sensor. Analyst 2017; 142:1974-1981. [PMID: 28504795 DOI: 10.1039/c7an00249a] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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.
Collapse
Affiliation(s)
- Savannah Kaye
- Center for Applied Optics, University of Alabama at Huntsville, Huntsville, AL 35899, USA.
| | - Zheng Zeng
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USA.
| | - Mollye Sanders
- Center for Applied Optics, University of Alabama at Huntsville, Huntsville, AL 35899, USA.
| | - Krishnan Chittur
- Chemical and Materials Engineering, University of Alabama Huntsville, Huntsville, AL 35899, USA and Genecapture, 601 Genome Way, Huntsville, AL 35806, USA
| | | | - Robert Lindquist
- Center for Applied Optics, University of Alabama at Huntsville, Huntsville, AL 35899, USA.
| | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham, AL 35249, USA
| | - Yongbin Lin
- Center for Applied Optics, University of Alabama at Huntsville, Huntsville, AL 35899, USA.
| | - Jianjun Wei
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USA.
| |
Collapse
|