Exhaled breath gas sensing using pristine and functionalized WO3 nanowire sensors enhanced by UV-light irradiation

Saidi, Tarik; Palmowski, Dariusz; Babicz-Kiewlicz, Sylwia; Welearegay, Tesfalem Geremariam; Bari, Nezha El; Ionescu, Radu; Smulko, Janusz; Bouchikhi, Benachir

doi:10.1016/j.snb.2018.07.098

Cited by 45 publications

(25 citation statements)

References 45 publications

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“…These nanowires have shown their affinity toward NO sensing at an operating temperature of 300 °C with decent response and recovery time. Saidi et al have grown WO 3 nanowires by aerosol assisted chemical vapor deposition (AACVD) for volatile organic compounds (VOCs) detection 23. Hieu et al could obtain large‐scale nanowire like structure of WO 3 by thermal oxidation of tungsten film which was earlier deposited on porous SWCNT structure 24.…”

Section: Tungsten Chalcogenides and Their Gas Sensing Applicationsmentioning

confidence: 99%

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

Jha

Bhat

2020

Adv Materials Inter

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bonding of transition metal and chalcogen atom and their crystal structure. Interestingly, all these compounds exist as layered material except tungsten oxide (WO 3 ) whose hydrated crystal (WO 3 .H 2 O) is layered in nature. [2,3] Each of these chalcogenides possesses unique features. Several micro and nanostructures of these chalcogenides have been synthesized in literature for various applications including gas sensors, biosensors, batteries, supercapacitor, photoelectrochemical and electrochromic devices. However, this review article will focus on gas sensing applications of these materials.Gas sensors play a crucial role in our life as they find applications ranging from monitoring indoor air quality to detecting highly toxic gases. Two important components of a gas sensing device are receptor and transducer. The receptor enables the chemical interaction with the target analyte molecule, which is further converted into analytical signal by the transducer. There are several transduction techniques available in gas sensing based on the physical or chemical change being measured. Broadly, they can be classified into six different classes based on sensing principles which is listed in Table 1.Chemiresistive devices have several advantages over other existing techniques. For example, the structure of these types of devices is very simple and it can be integrated with the current complementary metal oxide semiconductor (CMOS) technology. Even though, several advances have been made over last few years to improve sensing performance, the search for reliable and repeatable gas sensing element is an ongoing endeavor with lots of expectation from tungsten and molybdenum chalcogenides.After the rise of graphene, other layered materials have emerged as important functional materials for various applications of highest scientific values. Among these, layered transition metal dichalcogenides (TMDs) have a special presence as they cover whole class of materials, i.e., ranging from pure insulators to true metals. W and Mo chalcogenides are mostly semiconducting in ambient conditions and therefore, suitable for electronic application such as chemiresistive gas sensors. Though, layered TMDs (MX 2 M = Mo, and W and X = S, Se, and Te) have evolved expeditiously in a very short time, we simply cannot ignore metal oxide (particularly Mo-and W-based Chalcogens are oxygen family elements with oxygen having distinct properties than the other group members like sulfur, selenium, and tellurium. Tungsten and molybdenum chalcogenides that include mainly metal oxides (MO 3 ; M = Mo, and W) and metal dichalcogenides (MX 2 ; X = S, Se, and Te) are the most exciting class of inorganic materials. They have been widely investigated in various applications including lithium and sodium ion storage, supercapacitors, gas sensors, biosensors etc. due to their fascinating surface properties and ease of fabrication. Different class of nanostructures including 0D (nanoparticles, quantum dots), 1D (nanowires, nanotubes, nanoribbons, nanobelts etc.), a...

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Section: Tungsten Chalcogenides and Their Gas Sensing Applicationsmentioning

confidence: 99%

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

Jha

Bhat

2020

Adv Materials Inter

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“…UV light may increase the density of free electron-hole pairs. Moreover, depending on the UV intensity and UV morphology of the sensing layer, the response of gas sensors can be successfully enhanced [73]. Therefore, UV light can be used to decrease the power consumption of the gas sensors [74].…”

Section: Effect Of Uv Lightmentioning

confidence: 99%

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Mirzaei

Kim

et al. 2019

Chemosensors

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Volatile organic compounds (VOCs) are among the most abundant air pollutants. Their high concentrations can adversely affect the human body, and therefore, early detection of VOCs is of outmost importance. Among the different VOCs, in this review paper we have focused our attention to the monitoring of acetaldehyde by chemiresistive gas sensors fabricated from nanostructured semiconducting metal oxides. These sensors can not only provide a high sensing signal for detection of acetaldehyde but also high thermal and mechanical stability along with a low price. This review paper is divided into three major sections. First, we will introduce acetaldehyde as an important VOC and the importance of its detection. Then, the fundamentals of chemiresistive gas sensors will be briefly presented, and in the last section, a survey of the literature on acetaldehyde gas sensors will be presented. The working mechanism of acetaldehyde sensors, their structures, and configurations are reviewed. Finally, the future development outlook and potential applications are discussed, giving a complete panoramic view for researchers working and interested in acetaldehyde detection for different purposes in many fundamental and applicative fields.

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“…The huge surface-to-volume ratio of nanostructures improves the sensing performance of metal oxides very much, consenting to detect a gas down to concentrations lower one part per million (ppm). Furthermore, metal oxides (MOs) are sensitive to a wide range of volatile compounds and gases, and this makes them useful for a variety of applications: medical diagnosis (Saidi et al, 2018), defense against terrorist threats (Konstantynovski et al, 2018), agriculture (Sabir et al, 2014), and food and beverages quality (Miller et al, 2014). Finally, adjusting the size and shape of MO nanostructures permits to tune their sensing parameters, owed to their structure-dependent properties (Tonezzer and Iannotta, 2014).…”

Section: Introductionmentioning

confidence: 99%

Improved Gas Selectivity Based on Carbon Modified SnO2 Nanowires

et al. 2019

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The analysis of ambient (home, office, outdoor) atmosphere in order to check the presence of dangerous gases is getting more and more important. Therefore, tiny sensors capable to distinguish the presence of specific pollutants is crucial. Herein, a resistive sensor based on a carbon modified tin oxide nanowires, able to classify different gases and estimate their concentration, is presented. The C-SnO 2 nanostructures are grown by chemical vapor deposition and then used as a conductometric sensor under a temperature gradient. The device works at lower temperatures than pure SnO 2 , with a better response. Five outputs are collected and combined to form multidimensional data that are specific of each gas. Machine learning algorithms are applied to these multidimensional data in order to teach the system how to recognize different gases. The six tested gases (acetone, ammonia, CO, ethanol, hydrogen, and toluene) are perfectly classified by three models, demonstrating the goodness of the raw sensor response. The gas concentration can also be estimated, with an average error of 36% on the low concentration range 1-50 ppm, making the sensor suitable for detecting the exceedance of the danger thresholds.

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Exhaled breath gas sensing using pristine and functionalized WO3 nanowire sensors enhanced by UV-light irradiation

Cited by 45 publications

References 45 publications

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Improved Gas Selectivity Based on Carbon Modified SnO2 Nanowires

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