Combined taper-and-cylinder optical fiber probes for highly sensitive surface-enhanced Raman scattering

Liu, Ting; Zhou, Lei; Zhang, Zhonghuan; Xiao, Xiaosheng; Zhou, Meiling; Yang, Changxi

doi:10.1007/s00340-014-5764-7

Cited by 21 publications

(9 citation statements)

References 28 publications

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“…Surface‐enhanced Raman scattering photons trapped inside the fibre core, and propagating towards the fibre end, are more efficiently retroreflected by sharper tips, yielding a larger number of photons detected in the backscattering configuration they adopt. These findings are in agreement with the general trend found by Ting Liu et al , i.e. shaping the fibre apex as cones, instead of flat surfaces, increases the number of SERS photons trapped into the fibre, improving the sensitivity.…”

Section: Major Categories Of Optical Fibres In Raman Spectroscopysupporting

confidence: 93%

Review of optical fibre probes for enhanced Raman sensing

Wang

Zeng

et al. 2017

J Raman Spectroscopy

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Raman scattering is a photon‐molecular interaction based on the kinetic modes of an analyte. It offers unique fingerprint‐type signals that allow molecular identification. A serious challenge frequently encountered in Raman measurements arises from the requirements of fast, real‐time remote sensing, fluorescence suppression, ultra‐micro concentration detection, small sample volumes and label‐free biological specimens. This review focuses on fibre‐optic probes for Raman spectroscopy, especially for enhanced sampling applications. It aims at providing an overview over contemporary technology and recent excellent researches, and helps identifying future developments necessary to bring the emerging technology to instrument manufacturers and end users. After a short introduction to surface‐enhanced Raman scattering technology, professional algorithms for design optimization of the fibre Raman probe will be discussed and general design considerations presented. Subsequently, various common geometries employed for enhanced Raman sampling are enumerated based on the types of waveguide fibres: multi‐fibre optodes, long‐pathlength capillary, microstructured photonic crystal fibre and other waveguide arrangements. Additionally, the relevant detection parameters are reviewed, such as target analyte, limit of detection, waveguide media and detection principle. The review also includes a brief summary of the advantages and limitations of various fibre Raman probes. Finally, the future work is discussed which will promote the reliability and the applicability of fibre enhanced Raman sensors. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Major Categories Of Optical Fibres In Raman Spectroscopysupporting

confidence: 93%

Review of optical fibre probes for enhanced Raman sensing

Wang

Zeng

et al. 2017

J Raman Spectroscopy

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“…Recently, several studies combining SERS activity with optical fibre for directional development SERS optical fibre probe of biochemical compact optical fibre sensors using in outdoor fields have been recognized 27–29 . Ag nanoparticles have been modified on the silanized surface which was created by functionalizing SERS optical fibre probe 30–32 or the Ag nanoparticles have been synthesized on the fiber taper surface through chemical deposition method 33 .…”

Section: Introductionmentioning

confidence: 99%

Detection of Permethrin pesticide using silver nano-dendrites SERS on optical fibre fabricated by laser-assisted photochemical method

Pham

Hoang

Hai

et al. 2019

Sci Rep

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Permethrin, 3-Phenoxybenzyl (1 RS)-cis,trans-3-(2,2-dichlorovinyl)- 2,2-dimethylcyclopropanecarboxylate, has a wide range of applications like insecticide, insect repellent and prevents mosquito-borne diseases, such as dengue fever and malaria in tropical areas. In this work, we develop a prominent monitoring method for the detection of permethrin pesticide using surface-enhanced Raman scattering (SERS) optical fibre substrates. The novel SERS-active optical fibre substrates were grown and deposited silver (Ag) nano-dendrites on the end of multi-mode fibre core by laser-assisted photochemical method. The characteristic of the Ag-nanostructures could be controlled by the experimental conditions, namely, laser illumination time. Ag nanoparticles optical fibre substrates and Ag nano-dendrites optical fibre substrates were prepared with laser illumination time of 3 min and 8 min, respectively. The achieved SERS-activity optical fibre substrates were tested with Rhodamine 6G aqueous solutions. We demonstrate that the SERS activity coupled with Ag nano-dendrites optical fibre substrate has higher Raman enhancement factor due to the creation of many of hot-spots for amplifying Raman signals. Besides, the stability and reproducibility of the Ag nano-dendrites optical fibre substrate were also evaluated with stored time of 1000 hours and relative standard deviation of less than 3%. The Ag nano-dendrite optical fibre substrate was selected for detection of permethrin pesticide in the concentration range of 0.1 ppm–20 ppm with limit of quantification (LOQ) of 0.1 ppm and calculated limit of detection (LOD) of 0.0035 ppm, proving its great potential for direct, rapid detection and monitoring of permethrin.

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“…However, these physical fabrication methods are generally expensive, complicated, time-consuming and unsuitable for highthroughput fabrication. Chemical methods, such as chemical immobilization, 24 liquid phase synthesis 13 and photochemical deposition methods, 25,26 have been used to realize the lowcost, simple and rapid fabrication of fibre SERS probes. Unfortunately, it is difficult to improve their SERS EFs above 10 4 as a result of the formation of nanoparticle islands or discrete distributed nanoparticles on the fibre surfaces.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive fibre surface-enhanced Raman scattering probes fabricated using laser-induced self-assembly in a meniscus

et al. 2016

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Fibre surface-enhanced Raman scattering (SERS) probes have the advantages of flexibility, compactness, remote sensing capability and good repeatability in SERS detection and thus have a range of different applications. However, it is difficult to realize simple, low-cost and high-throughput preparations of fibre SERS probes with high sensitivity and desirable repeatability using the currently available fabrication techniques, which restricts their practical applications. We report here a simple, low-cost method using laser-induced self-assembly to realize the fast fabrication of fibre SERS probes with high sensitivity and excellent reproducibility. By lifting the fibre facet above a pre-synthesized nanoparticle colloid, a meniscus can be formed with the help of the surface tension of the liquid. Using irradiation from an induced laser guided by the fibre, localized thermal effects on the nanoparticles in the meniscus control the growth of the fibre probes and the electromagnetic interactions among the closely spaced nanoparticles assist the arrangement of nanoparticle clusters on the fibre facet. The prepared fibre probes showed a very high SERS sensitivity of 10(-10) M for p-aminothiophenol using a portable commericial Raman spectrometer with a short integration time of 2 s. They also showed excellent repeatability with relative standard deviations <2.8% in the SERS peak intensities for different detections with the same probe and 7.8% for different fibre probes fabricated under the same conditions.

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Combined taper-and-cylinder optical fiber probes for highly sensitive surface-enhanced Raman scattering

Cited by 21 publications

References 28 publications

Review of optical fibre probes for enhanced Raman sensing

Review of optical fibre probes for enhanced Raman sensing

Detection of Permethrin pesticide using silver nano-dendrites SERS on optical fibre fabricated by laser-assisted photochemical method

Highly sensitive fibre surface-enhanced Raman scattering probes fabricated using laser-induced self-assembly in a meniscus

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