Functional Films for Gas Sensing Applications: A Review

Gupta, Ankur; Parida, Pramod Kumar; Pal, Pramod

doi:10.1007/978-981-13-3290-6_2

Cited by 7 publications

(7 citation statements)

References 117 publications

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“…95 Likewise, in 2002, they reported the high sensitivity of group III nitride-based gas sensors to nitrogen dioxide (NO 2 ) and the potential use of GaN Schottky diode-based sensors. 3–40 Chung et al 87 demonstrated AlGaN/GaN high-electron mobility transistor (HEMT) sensors for hydrogen gas detection at high temperatures and under exposure to irradiation. This gas sensor was fabricated on AlGaN/GaN with Si as the substrate using platinum (Pt) as the gate electrode material for hydrogen detection in the gate area.…”

Section: Metal and Semiconductor Group III Nitride-based Gas Sensorsmentioning

confidence: 99%

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Recent progress on group III nitride nanostructure-based gas sensors

et al. 2022

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Section: Metal and Semiconductor Group III Nitride-based Gas Sensorsmentioning

confidence: 99%

“…The performance of sensors is measured using different parameters including selectivity, sensitivity, response time, recovery time, and detection limit. 9,10 Over the years, there have been continuous strides in the field of gas sensing. Different structures and materials have been used to achieve sensing and improve their performance.…”

Section: Introductionmentioning

confidence: 99%

Recent progress on group III nitride nanostructure-based gas sensors

et al. 2022

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“…Cu [23], Au [24], Pd [25], Fe [26], Ru [27], and Mn [28] are only some of the transition metals frequently reported on in the literature. The reason we selected Pd in this work was because of Pd's greater affinity towards hydrogen gas [29][30][31]. Alfano et al [32] developed a fully eco-friendly, Pd-decorated, graphene device for fast and selective detection of H 2 within a 30 s timeframe and with a 26% response value for exposure of 1% H 2 .…”

Section: Introductionmentioning

confidence: 99%

Palladium-Functionalized Graphene for Hydrogen Sensing Performance: Theoretical Studies

et al. 2021

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The adsorption characteristics of H2 molecules on the surface of Pd-doped and Pd-decorated graphene (G) have been investigated using density functional theory (DFT) calculations to explore the sensing capabilities of Pd-doped/decorated graphene. In this analysis, electrostatic potential, atomic charge distribution, 2D and 3D electron density contouring, and electron localization function projection, were investigated. Studies have demonstrated the sensing potential of both Pd-doped and Pd-decorated graphene to H2 molecules and have found that the gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), i.e., the HOMO-LUMO gap (HLG), decreases to 0.488 eV and 0.477eV for Pd-doped and Pd-decorated graphene, respectively. When H2 is adsorbed on these structures, electrical conductivity increases for both conditions. Furthermore, chemical activity and electrical conductivity are higher for Pd-decorated G than Pd-doped G, whereas the charge transfer of Pd-doped graphene is far better than that of Pd-decorated graphene. Also, studies have shown that the adsorption energy of Pd-doped graphene (−4.3 eV) is lower than that of Pd-decorated graphene (−0.44 eV); a finding attributable to the fact that the recovery time for Pd-decorated graphene is lower compared to Pd-doped graphene. Therefore, the present analysis confirms that Pd-decorated graphene has a better H2 gas sensing platform than Pd-doped graphene and, as such, may assist the development of nanosensors in the future.

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“…Among these different types of sensors, chemiresistive sensors are especially useful due to their stability and ease of fabrication, and they can operate over a wide temperature range. Chemiresistive gas sensors work on the principle of gas adsorption, whereas physical gas sensors work on the principle of ionization . Chemiresistive gas sensors rely on an electrical response caused by gas molecule adsorption on the surface of the sensitive layer, resulting in a significant change in the electrical resistance .…”

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“…Chemiresistive gas sensors work on the principle of gas adsorption, whereas physical gas sensors work on the principle of ionization. 18 Chemiresistive gas sensors rely on an electrical response caused by gas molecule adsorption on the surface of the sensitive layer, resulting in a significant change in the electrical resistance. 19 The majority of these sensors, however, require high operating temperatures.…”

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confidence: 99%

Multiplexed Gas Sensor: Fabrication Strategies, Recent Progress, and Challenges

Verma,

Gokarna,

Kadiri

et al. 2023

ACS Sens.

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Due to miscellaneous toxic gases in the vicinity, there is a burgeoning need for advancement in the existing gas sensing technology not only for the survival of mankind but also for the industries based in various fields such as beverage, forestry, health care, environmental monitoring, agriculture, and military security. A gas sensor must be highly selective toward a specific gas in order to avoid incorrect signals while responding to nontarget gases. This may lead to complex scenarios depicting sensor defects, such as low selectivity and crosssensitivity. Therefore, a multiplex gas sensor is required to address the problems of cross selectivity by combining different gas sensors, signal processing, and pattern recognition techniques along with the currently employed gas sensing technologies. The different sensing materials used in these sensor arrays will produce a unique response signal for developing a set of identifiers as the input that can be used to recognize a specific gas by its "fingerprint". This review provides a comprehensive review of chemiresistive-based multiplex gas sensors, including various fabrication strategies from expensive to lowcost techniques, advances in sensing materials, and a gist of various pattern recognition techniques used for both rigid and flexible gas sensor applications. Finally, the review assesses the current state-of-the-art in multiplex gas sensor technology and discusses various challenges for future research in this direction.

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Functional Films for Gas Sensing Applications: A Review

Cited by 7 publications

References 117 publications

Recent progress on group III nitride nanostructure-based gas sensors

Recent progress on group III nitride nanostructure-based gas sensors

Palladium-Functionalized Graphene for Hydrogen Sensing Performance: Theoretical Studies

Multiplexed Gas Sensor: Fabrication Strategies, Recent Progress, and Challenges

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