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

Okuda, Hirofumi; Wang, Tao; Lee, SeungWoo

doi:10.1002/ecj.11933

Cited by 15 publications

(5 citation statements)

References 14 publications

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“…On the other hand, an active optic fiber is modified with receptors/indicators rendering it intrinsically sensitive to VOCs . Nanomaterials (e.g., graphene , and metal oxides) , and polymers − have been used as indicators, showing better interactions with VOCs and stronger responses . These modifications are usually achieved by various coating techniques.…”

Section: Sensing Strategies: Transduction Mechanisms and Sensor Class...mentioning

confidence: 99%

Sensors for Volatile Organic Compounds

2022

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This paper provides an overview of recent developments in the field of volatile organic compound (VOC) sensors, which are finding uses in healthcare, safety, environmental monitoring, food and agriculture, oil industry, and other fields. It starts by briefly explaining the basics of VOC sensing and reviewing the currently available and quickly progressing VOC sensing approaches. It then discusses the main trends in materials’ design with special attention to nanostructuring and nanohybridization. Emerging sensing materials and strategies are highlighted and their involvement in the different types of sensing technologies is discussed, including optical, electrical, and gravimetric sensors. The review also provides detailed discussions about the main limitations of the field and offers potential solutions. The status of the field and suggestions of promising directions for future development are summarized.

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Section: Sensing Strategies: Transduction Mechanisms and Sensor Class...mentioning

confidence: 99%

Sensors for Volatile Organic Compounds

2022

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“…Remarkably, Pt NP-functionalization increased the sensitivity in comparison to pristine GO [ 188 ], while the concentration of Ag NPs was inversely correlated with sensitivity [ 189 ]; this reveals the benefits as well as the vulnerability of the synergistic effects of hybrid materials. An additional hybrid material, namely a thin film of poly (allylamine hydrochloride) and Si NPs infused with tetrakis (4-sulfophenyl) porphine, has been used as an optical-fiber coating for the selective detection of methanol in the presence of water and other alcoholic vapors [ 190 ].…”

Section: Types Of Nanomaterial-based Sensors In Breath Analysismentioning

confidence: 99%

Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Kaloumenou

Skotadis

Lаgopati

et al. 2022

Sensors

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Early-stage disease diagnosis is of particular importance for effective patient identification as well as their treatment. Lack of patient compliance for the existing diagnostic methods, however, limits prompt diagnosis, rendering the development of non-invasive diagnostic tools mandatory. One of the most promising non-invasive diagnostic methods that has also attracted great research interest during the last years is breath analysis; the method detects gas-analytes such as exhaled volatile organic compounds (VOCs) and inorganic gases that are considered to be important biomarkers for various disease-types. The diagnostic ability of gas-pattern detection using analytical techniques and especially sensors has been widely discussed in the literature; however, the incorporation of novel nanomaterials in sensor-development has also proved to enhance sensor performance, for both selective and cross-reactive applications. The aim of the first part of this review is to provide an up-to-date overview of the main categories of sensors studied for disease diagnosis applications via the detection of exhaled gas-analytes and to highlight the role of nanomaterials. The second and most novel part of this review concentrates on the remarkable applicability of breath analysis in differential diagnosis, phenotyping, and the staging of several disease-types, which are currently amongst the most pressing challenges in the field.

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“…Another interesting work for selective methanol gas detection by using a U-bent optical fiber modified with a silica nanoparticle multilayer is presented in [119]. In this work, tetrakis(4-sulfophenyl) porphine (TSPP) has been infused to a multilayer structure composed of PAH and SiO 2 nanoparticles because the increase of the surface area by porous multilayer makes possible an enhancement of the diffusion of the target molecules into the film.…”

Section: Applications Of the Optical Fiber Sensors Based On Layer-mentioning

confidence: 99%

Layer-by-Layer Nano-assembly: A Powerful Tool for Optical Fiber Sensing Applications

Rivero

Goicoechea

Arregui

2019

Sensors

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The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level enables an improvement of intrinsic properties (optical, chemical or physical) in comparison with the traditional bulk materials. In this sense, among all the known nanofabrication techniques, the layer-by-layer (LbL) nano-assembly method is a flexible, easily-scalable and versatile approach which makes possible precise control of the coating thickness, composition and structure. The development of sensitive nanocoatings has shown an exceptional growth in optical fiber sensing applications due to their self-assembling ability with oppositely charged components in order to obtain a multilayer structure. This nanoassembly technique is a powerful tool for the incorporation of a wide variety of species (polyelectrolytes, metal/metal oxide nanoparticles, hybrid particles, luminescent materials, dyes or biomolecules) in the resultant multilayer structure for the design of high-performance optical fiber sensors. In this work we present a review of applications related to optical fiber sensors based on advanced LbL coatings in two related research areas of great interest for the scientific community, namely chemical sensing (pH, gases and volatile organic compounds detection) as well as biological/biochemical sensing (proteins, immunoglobulins, antibodies or DNA detection).

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

Cited by 15 publications

References 14 publications

Sensors for Volatile Organic Compounds

Sensors for Volatile Organic Compounds

Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Layer-by-Layer Nano-assembly: A Powerful Tool for Optical Fiber Sensing Applications

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