pH sensor based on a detection sol–gel layer onto optical fiber

Miled, Othman Belhadj; Ouada, H. Ben; Livage, Jacques

doi:10.1016/s0928-4931(02)00100-5

Cited by 42 publications

(4 citation statements)

References 24 publications

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“…This, configuration is usually referred as cladding removed (CR) followed by the optical fiber type such as multi-mode fiber (MMF) or plastic optical fiber (POF) and have been largely exploited in literature for the development of optical fiber sensors for ammonia [86,87], humidity [88,89], toluene [90], H 2 S [91,92], aerosol [93] or pH [94][95][96][97][98][99][100][101][102][103][104] detection.…”

Section: Absorbance-based Sensorsmentioning

confidence: 99%

“…As regard as the modification of the optical fiber structure it can be mentioned the fabrication of optical fiber sensors by means of hetero-core optical fibers (HCOF) [105][106][107], tapers [22,108,109] or side-polished fibers [94] cresol red, chlorophenol red, bromophenol blue + CNTs [115] Cresol red, chlorophenol red, bromophenol blue [95,96] Ethyl violet [97] Bromophenol blue [98] Bromocresol green & cresol red [99] silica matrix [100] methyl orange sol-gel [101] polymeric film [102] CRMMF/CRPOF [110,111] while the use of special optical fibers for the fabrication of sensors is mainly referred to hollow-core fibers (HCFs) [112,108] and microstructured optical fibers (MOFs) [113,114].…”

Section: Absorbance-based Sensorsmentioning

confidence: 99%

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Nanostructured Materials in Optical Fiber Sensing

Hernáez¹

2013

TOOPTSJ

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This work comprehends a review of nanostructured materials employed in the fabrication of optical fiber sensors in the last years. The continuous advances in nanofabrication techniques have enabled to manipulate the matter precisely producing well defined nanostructurated coatings or repetitive patterns at nanoscale level. The interactions of light with these nano-organized materials or patterns at the nanoscale level enable to observe interesting phenomena, such as interferometry, fluorescence, absorbance, resonances and many others which can be exploited in the fabrication of sensing devices. A particular case consists of optical fiber sensors, where the light travelling through an optical fiber interacts with the sensitive layer. The properties of the sensitive layer, such as the organization, physical properties, chemical bounds etc. will determine the sensing characteristics of the final device. The utilization of some of the most common nanostructured materials, such as polymers, nanoparticles, metals, metal oxides or biological coatings are reviewed here.

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Section: Absorbance-based Sensorsmentioning

confidence: 99%

Section: Absorbance-based Sensorsmentioning

confidence: 99%

Nanostructured Materials in Optical Fiber Sensing

Hernáez¹

2013

TOOPTSJ

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“…23 Many other authors proposed sensors with different pH indicators entrapped in a sol–gel matrix, but these studies were not focused on concrete monitoring. 24 -47…”

Section: Introductionmentioning

confidence: 99%

Sol–gel-entrapped pH indicator for monitoring pH variations in cementitious materials

Inserra

Hayashi

Marchisio

et al. 2020

Journal of Applied Biomaterials & Functional Materials

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“…Fabric functionalization with halochromic dyes is generally performed by conventional exhaustion dyeing (Khatri et al, 2015), surface treatment and coating (Galbraith, 2004;Cheng et al, 2008), sol-gel process (Miled et al, 2002;Trovato et al, 2018), or microencapsulation technique (Nelson, 2002). However, many of these methods can suffer from long dyeing time at high temperature, insufficient exhaustion and fixation levels, and inadequate affinity of dye and fibers, which result in poor treatment durability, dye leaching and slow sensor response time when the dye is incorporated into the fabric.…”

Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

et al. 2020

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This paper investigates the photo-grafting of a halochromic molecule on cotton fabric surfaces. Nitrazine yellow (NY) dye was modified with a methacrylate moiety (GMA) obtaining a photo-reactive dye (GMA-NY), which was covalently grafted onto the cellulosic substrate by means of UV irradiation. The photo-grafting reaction was studied by FT-IR spectroscopy, while the pH response of the functionalized fabric was evaluated at different pH conditions (i.e., acidic and alkaline conditions) both in wet and vapor environments by spectrophotometric analyses. The results showed that the photografting of the modified dye onto the fabric was successful: treated cotton clearly changed color when subjected to different pH. It was thus demonstrated that the GMA-NY dye, photo-grafted on cotton, can successfully impart pH sensing properties to the fabric, which can therefore find numerous applications in the area of smart textiles.

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pH sensor based on a detection sol–gel layer onto optical fiber

Cited by 42 publications

References 24 publications

Nanostructured Materials in Optical Fiber Sensing

Nanostructured Materials in Optical Fiber Sensing

Sol–gel-entrapped pH indicator for monitoring pH variations in cementitious materials

Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

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