Systematic Review on Design and Development of Efficient Semiconductor Based Surface Acoustic Wave Gas Sensor

Patial, Payal; Deshwal, Manish

doi:10.1007/s42341-021-00332-1

Cited by 7 publications

(5 citation statements)

References 40 publications

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“…This type of sensor has a fast detection speed. [ 87 ] The electrical sensor system consists of a gas sensing element, a conversion circuit, and a power supplier. The gas sensing element is responsible for detecting the target gas and the conversion circuit converts the chemical signal from the gas sensing element into an electrical signal.…”

Section: Sensing Performance Indexesmentioning

confidence: 99%

Progress and Perspectives of Single‐Atom Catalysts for Gas Sensing

et al. 2022

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Single‐atom catalysts (SACs) attract extensive attention in the field of heterogeneous catalysis in recent years due to the maximum atom utilization and unique physical and chemical properties. The gas sensing is actually a heterogeneous catalysis process but the SACs are new to this area. Although SACs show huge potential in gas sensing, the SACs gas sensing area currently is still at the infancy stage. This work critically reviews the recent advances and current status of single‐atom gas sensing materials. General synthesis routes, characterization methods, and sensing performance indexes are introduced. At the end, the challenges and future prospects on SACs gas sensing are presented from the authors’ perspectives. This work is anticipated to provide insights and guideline for the chemical sensing community.

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Section: Sensing Performance Indexesmentioning

confidence: 99%

Progress and Perspectives of Single‐Atom Catalysts for Gas Sensing

et al. 2022

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“…25 In this regard, gas sensors with portability, low price, and online response are preferred for practical applications. There are various gas sensors such as surface acoustic waves, 26 gasochromic, 27 optical, 28 and resistive. 29 Among them, resistive gas sensors are highly popular thanks to their high sensitivity, stability, fast response time (t res ), and affordability.…”

Section: Introductionmentioning

confidence: 99%

Resistive Gas Sensors Based on 2D TMDs and MXenes

Mirzaei,

Kim,

Kim

et al. 2024

Acc. Chem. Res.

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Metrics & MoreArticle Recommendations CONSPECTUS: Gas sensors are used in various applications to sense toxic gases, mainly for enhanced safety. Resistive sensors are particularly popular owing to their ability to detect trace amounts of gases, high stability, fast response times, and affordability. Semiconducting metal oxides are commonly employed in the fabrication of resistive gas sensors. However, these sensors often require high working temperatures, bringing about increased energy consumption and reduced selectivity. Furthermore, they do not have enough flexibility, and their performance is significantly decreased under bending, stretching, or twisting. To address these challenges, alternative materials capable of operating at lower temperatures with high flexibility are needed. Two-dimensional (2D) materials such as MXenes and transition-metal dichalcogenides (TMDs) offer high surface area and conductivity owing to their unique 2D structure, making them promising candidates for realization of resistive gas sensors. Nevertheless, their sensing performance in pristine form is typically weak and unacceptable, particularly in terms of response, selectivity, and recovery time (t rec ). To overcome these drawbacks, several strategies can be employed to enhance their sensing properties. Noble-metal decoration such as (Au, Pt, Pd, Rh, Ag) is a highly promising method, in which the catalytic effects of noble metals as well as formation of potential barriers with MXenes or TMDs eventually contribute to boosted response. Additionally, bimetallic noble metals such as Pt−Pd and Au/Pd with their synergistic properties can further improve sensor performance. Ion implantation is another feasible approach, involving doping of sensing materials with the desired concentration of dopants through control over the energy and dosage of the irradiation ions as well as creation of structural defects such as oxygen vacancies through high-energy ion-beam irradiation, contributing to enhanced sensing capabilities. The formation of core−shell structures is also effective, creating numerous interfaces between core and shell materials that optimize the sensing characteristics. However, the shell thickness needs to be carefully optimized to achieve the best sensing output. To reduce energy consumption, sensors can operate in a self-heating condition where an external voltage is applied to the electrodes, significantly lowering the power requirements. This enables sensors to function in energy-constrained environments, such as remote or low-energy areas. An important advantage of 2D MXenes and TMDs is their high mechanical flexibility. Unlike semiconducting metal oxides that lack mechanical flexibility, MXenes and TMDs can maintain their sensing performance even when integrated onto flexible substrates and subjected to bending, tilting, or stretching. This flexibility makes them ideal for fabricating flexible and portable gas sensors that rigid sensors cannot achieve.

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“…To date, SAW microdevices are coated with a suitable sensing material, such as metal oxides or metals, to sense the targeted gas effectively [7][8][9] . Among different metal oxides, zinc oxide (ZnO) is widely used as a gas sensing material for detecting carbon dioxide (CO2), ammonia (NH3), and nitrogen dioxide (NO2) gases due to its superior physiochemical properties, long-term stability, and quick response time [10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

On the performance of PVDF based piezoelectric sensor with microstructures

Govindarajan¹,

Stark²,

Madiyar³

et al. 2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

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This paper aims to investigate the performance of piezoelectric sensors with different shapes of 3D-printed microstructures. Based on the numerical analysis in the time-frequency domain, the microstructures are printed directly on the PVDF transparent film exhibiting higher piezoelectric coefficients using a high-resolution two-photon polymerization method. Bi-directional gold IDTs are fabricated by sputtering gold onto the substrate surface using a 3D-printed stencil. The mechanical properties of the film and surface morphology of printed microstructures are examined using a nanoindenter and a 3D profilometer. The change in frequency response due to the microstructure is measured using a network analyzer. This study will be a reference for developing an efficient wave-based gas sensor with enhanced sensitivity.

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Systematic Review on Design and Development of Efficient Semiconductor Based Surface Acoustic Wave Gas Sensor

Cited by 7 publications

References 40 publications

Progress and Perspectives of Single‐Atom Catalysts for Gas Sensing

Progress and Perspectives of Single‐Atom Catalysts for Gas Sensing

Resistive Gas Sensors Based on 2D TMDs and MXenes

On the performance of PVDF based piezoelectric sensor with microstructures

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