A fibre-optic humidity sensor based on a porous silica xerogel film as the sensing element

Estella, Juncal; Vicente, P. de; Echeverría, Jesús C.; Garrido, Julián

doi:10.1016/j.snb.2010.06.012

Cited by 72 publications

(34 citation statements)

References 25 publications

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“…Growing efforts have been put in the development of nanostructured materials based humidity sensors to further improve the sensing characteristics [251,252]. Among various sensing strategies used to detect humidity such as impedance [253], capacity [254], and optics [255], QCM have been emerging as very stable sensors for humidity detection [106]. On the other hand, many approaches for fabricating humidity-sensitive membranes such as spin coating [256], dip coating [257], layer-by-layer self-assembly [258], and ink-jet printing [259], have been reported.…”

Section: Qcm Sensorsmentioning

confidence: 99%

Electro-spinning/netting: A strategy for the fabrication of three-dimensional polymer nano-fiber/nets

Wang

Ding

Sun

et al. 2013

Progress in Materials Science

478

300

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a b s t r a c tSince 2006, a rapid development has been achieved in a subject area, so called electro-spinning/netting (ESN), which comprises the conventional electrospinning process and a unique electro-netting process. Electronetting overcomes the bottleneck problem of electrospinning technique and provides a versatile method for generating spider-web-like nanonets with ultrafine fiber diameter less than 20 nm. Nano-nets, supported by the conventional electrospun nanofibers in the nano-fiber/nets (NFN) membranes, exhibit numerious attractive characteristics such as extremely small diameter, high porosity, and Steiner tree network geometry, which make NFN membranes optimal candidates for many significant applications. The progress made during the last few years in the field of ESN is highlighted in this review, with particular emphasis on results obtained in the author's research units. After a brief description of the development of the electrospinning and ESN techniques, several fundamental properties of NFN nanomaterials are addressed. Subsequently, the used polymers and the state-of-the-art strategies for the controllable fabrication of NFN membranes are highlighted in terms of the ESN process. Additionally, we highlight some potential applications associated with the remarkable features of NFN nanostructure. Our discussion is concluded with some personal perspectives on the future development in which this wonderful technique could be pursued.

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Section: Qcm Sensorsmentioning

confidence: 99%

Electro-spinning/netting: A strategy for the fabrication of three-dimensional polymer nano-fiber/nets

Wang

Ding

Sun

et al. 2013

Progress in Materials Science

478

300

View full text Add to dashboard Cite

show abstract

“…To prepare humidity sensors, different materials have been used as the host material such as zeolites, which exhibit a higher stability against organic solvents, acids and bases as well as a high resistance to temperature and radiation [21], or silica xerogel films [22] as well as different organic polymers: silicones, hydroxypropyl cellulose, gelatine, polymethyl methacrylate, poly (tetrafluoro ethylene), nafion, nylon, agarose, etc. [23].…”

Section: Introductionmentioning

confidence: 99%

Optical humidity sensor using methylene blue immobilized on a hydrophilic polymer

Fernández-Ramos

Ordóñez

Capitán-Vallvey

et al. 2015

Sensors and Actuators B: Chemical

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“…Taking advantage of this feature, the sol-gel matrix can be doped with materials sensitive to organic vapors: as an example, a vapochromic compound was dissolved in ethanol and then added into the initial sol-gel solution [81]. The diffusion of the organic vapor is affected by its polarity, but also by its molecular size.…”

Section: Applicationsmentioning

confidence: 99%

Fiber Optic Sensors Based on Nanostructured Materials

Elosúa

Hernáez

Matı́as

et al. 2014

Springer Series in Surface Sciences

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Fiber optic sensors have been developed taking advantage on the synergy between the properties of nanostructured materials and the ones that characterize an optical fiber. The mechanical properties of optical fiber introduce some restrictions to the techniques used for the deposition of materials. As an alternative to the classical deposition procedures, wet coating techniques have been successfully applied in these cases. The current chapter put emphasis on materials that can be incorporated using wet coating techniques. The first one presented is the multilayer based nanostructures: among the different alternatives, we have focused on materials prepared with the Layer-by-Layer technique. Another type of products used for the fabrication of optical fiber sensors is sol-gel matrices, which are made of silica, so that its optical properties are similar to the ones of an optical fiber. The other two described type of products have focused the attention of many researchers in the recent years. Firstly, materials with an enhanced selectivity are presented: the molecularly imprinted polymers (MIPs). Finally, sensors based on metallic nanolayers and particles are presented. All these materials and techniques have acquired a great importance in the field of optical fiber sensors due to their versatility and the good features that offer.

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A fibre-optic humidity sensor based on a porous silica xerogel film as the sensing element

Cited by 72 publications

References 25 publications

Electro-spinning/netting: A strategy for the fabrication of three-dimensional polymer nano-fiber/nets

Electro-spinning/netting: A strategy for the fabrication of three-dimensional polymer nano-fiber/nets

Optical humidity sensor using methylene blue immobilized on a hydrophilic polymer

Fiber Optic Sensors Based on Nanostructured Materials

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