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Han X, Zhang Y, Zhang Y, Song Q, Hasi W, Lin S, Wang F. A temperature compensated fiber probe for highly sensitive detection in virus gene biosensing. Anal Chim Acta 2024; 1316:342820. [PMID: 38969422 DOI: 10.1016/j.aca.2024.342820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 06/03/2024] [Indexed: 07/07/2024]
Abstract
This research presents an innovative reflective fiber optic probe structure, mutinously designed to detect H7N9 avian influenza virus gene precisely. This innovative structure skillfully combines multimode fiber (MMF) with a thin-diameter seven-core photonic crystal fiber (SCF-PCF), forming a semi-open Fabry-Pérot (FPI) cavity. This structure has demonstrated exceptional sensitivity in light intensity-refractive index (RI) response through rigorous theoretical and experimental validation. The development of a quasi-distributed parallel sensor array, which provides temperature compensation during measurements, has achieved a remarkable RI response sensitivity of up to 532.7 dB/RIU. The probe-type fiber optic sensitive unit, expertly functionalized with streptavidin, offers high specificity in detecting H7N9 avian influenza virus gene, with an impressively low detection limit of 10-2 pM. The development of this biosensor marks a significant development in biological detection, offering a practical engineering solution for achieving high sensitivity and specificity in light-intensity-modulated biosensing. Its potential for wide-ranging applications in various fields is now well-established.
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Affiliation(s)
- Xiaopeng Han
- The National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, 150080, China
| | - Yu Zhang
- Space Environment Simulation Research Infrastructure, Harbin Institute of Technology, Harbin, 150080, China; School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, China
| | - Yundong Zhang
- The National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, 150080, China; College of Aeronautics and Astronautics, Harbin Institute of Technology, Harbin, 150080, China.
| | - Qinghao Song
- Space Environment Simulation Research Infrastructure, Harbin Institute of Technology, Harbin, 150080, China.
| | - Wuliji Hasi
- The National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, 150080, China; College of Aeronautics and Astronautics, Harbin Institute of Technology, Harbin, 150080, China
| | - Siyu Lin
- The National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, 150080, China
| | - Fan Wang
- The National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, 150080, China
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Banchelli M, Tombelli S, de Angelis M, D'Andrea C, Trono C, Baldini F, Giannetti A, Matteini P. Molecular beacon decorated silver nanowires for quantitative miRNA detection by a SERS approach. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:6165-6176. [PMID: 37961002 DOI: 10.1039/d3ay01661g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Advantages of biosensors based on surface enhanced Raman scattering (SERS) rely on improved sensitivity and specificity, and suited reproducibility in detecting a target molecule that is localized in close proximity to a SERS-active surface. Herein, a comprehensive study on the realization of a SERS biosensor designed for detecting miRNA-183, a miRNA biomarker that is specific for chronic obstructive pulmonary disease (COPD), is presented. The used strategy exploits a signal-off mechanism by means of a labelled molecular beacon (MB) as the oligonucleotide biorecognition element immobilized on a 2D SERS substrate, based on spot-on silver nanowires (AgNWs) and a multi-well low volume cell. The MB was properly designed by following a dedicated protocol to recognize the chosen miRNA. A limit of detection down to femtomolar concentration (3 × 10-16 M) was achieved and the specificity of the biosensor was proved. Furthermore, the possibility to regenerate the sensing system through a simple procedure is shown: with regeneration by using HCl 1 mM, two detection cycles were performed with a good recovery of the initial MB signal (83%) and a reproducible signal after hybridization.
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Affiliation(s)
- Martina Banchelli
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Sara Tombelli
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Marella de Angelis
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Cristiano D'Andrea
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Cosimo Trono
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Francesco Baldini
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Ambra Giannetti
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
| | - Paolo Matteini
- Istituto di Fisica Applicata Nello Carrara - CNR, Via Madonna del Piano 10, Sesto F.no (FI), Italy.
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