Long period grating based toluene sensor for use with water contamination

Partridge, Matthew; Wong, Rebecca Yen-Ni; James, Stephen W.; Davis, Frank; Higson, Séamus P.J.; Tatam, Ralph P.

doi:10.1016/j.snb.2014.06.121

Cited by 45 publications

(24 citation statements)

References 20 publications

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“…The optical fiber sensor with these merits is applied in a wide range of fields such as energy, environment, chemistry, and biology [2,3]. The optical fiber sensor with these merits is applied in a wide range of fields such as energy, environment, chemistry, and biology [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The sensor based on optical fiber has merits such as chemical/thermal stability, compact size, and high sensitivity. The optical fiber sensor with these merits is applied in a wide range of fields such as energy, environment, chemistry, and biology [2,3]. Evanescent wave optical fiber (EWOF) is an optical device based on good transmission characteristics occurring between quartz core of fiber and peripheral cladding, and the interest in its applications as chemical sensor has been increasing in recent years [4].…”

Section: Introductionmentioning

confidence: 99%

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Selective Methanol Gas Detection Using a U‐Bent Optical Fiber Modified with a Silica Nanoparticle Multilayer

Okuda

Wang

Lee

2017

Elect Comm in Japan

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SUMMARY The development of an evanescent wave optical fiber sensor modified with an organic–inorganic hybrid nanoporous thin film for the detection of organic solvent vapors was demonstrated. The optical fiber with a core diameter of 200 μm was bent into U‐shape to enhance the penetration depth of light transferred into the evanescent field, and modified with a multilayered thin film of poly (allylamine hydrochloride) and silica nanoparticles (PAH/SiO2)n, via layer‐by‐layer (LbL) film deposition. The mesoporous film structure led to higher molecular diffusion and the highest selectivity to methanol among the six alcohols and water, which were used as target analytes, by the aid of tetrakis (4‐sulfophenyl) porphine (TSPP) infused inside the film.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Methanol Gas Detection Using a U‐Bent Optical Fiber Modified with a Silica Nanoparticle Multilayer

Okuda

Wang

Lee

2017

Elect Comm in Japan

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“…Various deposition techniques, such as dip-and-spin coating [16], layer-by-layer (LbL) deposition electrostatic self-assembly [17], Langmuir-Blodgett deposition [18], and 2 Journal of Sensors chemical and physical vapour deposition [19], have been employed for the functional coating of optical fibres. Among these techniques, the LbL technique, which is based on the alternate adsorption of polycations and polyanions onto the surface, is a powerful surface modification method.…”

Section: Introductionmentioning

confidence: 99%

Novel Highly Sensitive Protein Sensors Based on Tapered Optical Fibres Modified with Au-Based Nanocoatings

et al. 2016

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Novel protein sensors based on tapered optical fibres modified with Au coatings deposited using two different procedures are proposed. Au-based coatings are deposited onto a nonadiabatic tapered optical fibre using (i) a novel facile method composed of layer-by-layer deposition consisting of polycation (poly(allylamine hydrochloride), PAH) and negatively charged SiO 2 nanoparticles (NPs) followed by the deposition of the charged Au NPs and (ii) the sputtering technique. The Au NPs and Au thin film surfaces are then modified with biotin in order to bind streptavidin (SV) molecules and detect them. The sensing principle is based on the sensitivity of the transmission spectrum of the device to changes in the refractive index of the coatings induced by the SV binding to the biotin. Both sensors showed high sensitivity to SV, with the lowest measured concentration levels below 2.5 nM. The calculated binding constant for the biotin-SV pair was 2.2 × 10 −11 M −1 when a tapered fibre modified with the LbL method was used, with a limit of detection (LoD) of 271 pM. The sensor formed using sputtering had a binding constant of 1.01 × 10with a LoD of 806 pM. These new structures and their simple fabrication technique could be used to develop other biosensors.

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“…However, some applications require refractometric sensors for water-based environments, which refractive index is around 1.33. The association of LPG with LSPR can provide increased sensitivity and dynamic range to these sensors, apart from chemical and biological selectivity 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Effects from detuning the resonant coupling between fiber gratings and localized surface plasmons

et al. 2016

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In this work, we demonstrate the effect of detuning the resonant coupling between a long period grating and the plasmonic band of gold nanoparticles on the device sensitivity. In an intensity coded configuration, the sensitivity was measured at 568.12 nm and 598.62 nm, for surroundings refractive indexes ranging from 1.3629 to 1.4184. A comparison between the responses of the two dips centered at these wavelengths resulted in a sensitivity enhancement of about 17 times for the dip localized close to the center of the localized surface plasmon resonance.

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Long period grating based toluene sensor for use with water contamination

Cited by 45 publications

References 20 publications

Selective Methanol Gas Detection Using a U‐Bent Optical Fiber Modified with a Silica Nanoparticle Multilayer

Selective Methanol Gas Detection Using a U‐Bent Optical Fiber Modified with a Silica Nanoparticle Multilayer

Novel Highly Sensitive Protein Sensors Based on Tapered Optical Fibres Modified with Au-Based Nanocoatings

Effects from detuning the resonant coupling between fiber gratings and localized surface plasmons

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