Fiber-Optic pH Sensor Based on SPR of Silver Nanostructured Film

Saikia, Rajib; Buragohain, Mridul; Datta, Pranayee; Nath, Pabitra; Barua, K.

doi:10.1063/1.3183440

Cited by 9 publications

(9 citation statements)

References 1 publication

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“…Other methods rely on dependence of dielectric’s refractive index on concentration of target chemicals, such as a water salinity sensor [ 131 ]. Several pH fiber optic LSPR sensors have also been demonstrated [ 132 , 133 ]. Gas sensing with SPR typically relies on metals (palladium, silver) or semiconducting metal oxide over-layers (indium tin oxide, tin dioxide, nickel oxide, zinc oxide, titanium dioxide) that change their electric permittivity when exposed to gaseous environments.…”

Section: Applicationsmentioning

confidence: 99%

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Klantsataya

Jia

Ebendorff-Heidepriem

et al. 2016

Sensors

171

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Surface Plasmon Resonance (SPR) fiber sensor research has grown since the first demonstration over 20 year ago into a rich and diverse field with a wide range of optical fiber architectures, plasmonic coatings, and excitation and interrogation methods. Yet, the large diversity of SPR fiber sensor designs has made it difficult to understand the advantages of each approach. Here, we review SPR fiber sensor architectures, covering the latest developments from optical fiber geometries to plasmonic coatings. By developing a systematic approach to fiber-based SPR designs, we identify and discuss future research opportunities based on a performance comparison of the different approaches for sensing applications.

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Section: Applicationsmentioning

confidence: 99%

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Klantsataya

Jia

Ebendorff-Heidepriem

et al. 2016

Sensors

171

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“…It has been found that the SPR, which is produced by the quantized movement of the conduction electrons in the NPs as a consequence of the incident electric field that results in a displacement of negative and positive charges, is influenced by the NP size [23][24][25][26], shape [23,27] and surface functionalization [28][29][30]. Due to their sensitivity to surface functionalization, Ag NP-based SPR sensors have been intensively studied and applied, over the past two decades [31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Destabilization of PVA-stabilized Ag NPs: color changes at low aqueous concentrations, induced by aggregation and coalescence

Yang²,

Zhu

et al. 2020

Mater. Res. Express

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Aqueous concentrations of poly(vinyl alcohol) (PVA)-stabilized ∼10 nm silver nanoparticles (Ag NPs), in the 1000 ppm concentration range, have been shown to be highly stable at elevated temperatures. However, lower concentrations of these NPs undergo color changes, without precipitation, when heated or when held for extended periods of time at room temperature. We have studied their optical and morphological changes at 80°C, using UV-vis spectra and TEM, and found that their color, at a concentration of 10 ppm, changes from yellow to claret-red to black without precipitation. Further, the plasmon resonance peak at ∼400 nm diminishes as a new peak develops at ∼550 nm. These changes occur as the previously well-dispersed NPs (yellow color) agglomerate to chains (claret-red color) and, finally, coalesce (black color). We discuss the cause of the instability.

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“…The sensitivity and plasmonic response of the LSPR U-bent fiber-optic sensor using different types of noble metallic nanoparticles were studied and compared. Saikia et al [ 61 ] used a silver nanostructured and tapered U-bent fiber-optic probe as a pH sensor. The effects of factors such as tapering and the presence of the nanostructures on the sensitivity of U-bent fiber-optic probe were investigated.…”

Section: Recent Studies Of Fiber-optic Localized Surface Plasmon Rmentioning

confidence: 99%

Fiber-Optic Localized Surface Plasmon Resonance Sensors Based on Nanomaterials

Lee

Song

Ahn

et al. 2021

Sensors

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Applying fiber-optics on surface plasmon resonance (SPR) sensors is aimed at practical usability over conventional SPR sensors. Recently, field localization techniques using nanostructures or nanoparticles have been investigated on optical fibers for further sensitivity enhancement and significant target selectivity. In this review article, we explored varied recent research approaches of fiber-optics based localized surface plasmon resonance (LSPR) sensors. The article contains interesting experimental results using fiber-optic LSPR sensors for three different application categories: (1) chemical reactions measurements, (2) physical properties measurements, and (3) biological events monitoring. In addition, novel techniques which can create synergy combined with fiber-optic LSPR sensors were introduced. The review article suggests fiber-optic LSPR sensors have lots of potential for measurements of varied targets with high sensitivity. Moreover, the previous results show that the sensitivity enhancements which can be applied with creative varied plasmonic nanomaterials make it possible to detect minute changes including quick chemical reactions and tiny molecular activities.

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Fiber-Optic pH Sensor Based on SPR of Silver Nanostructured Film

Cited by 9 publications

References 1 publication

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Destabilization of PVA-stabilized Ag NPs: color changes at low aqueous concentrations, induced by aggregation and coalescence

Fiber-Optic Localized Surface Plasmon Resonance Sensors Based on Nanomaterials

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