Semiconductor metal oxide compounds based gas sensors: A literature review

Patil, Sunil Jagannath; Patil, Arun Vithal; Dighavkar, C. G.; Thakare, Kashinath Shravan; Borase, Ratan Yadav; Nandre, Sachin Jayaram; Deshpande, Nishad G.; Ahire, R. R.

doi:10.1007/s11706-015-0279-7

Cited by 116 publications

(53 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Metal oxides such as ZnO, SnO 2 , TiO 2 , In 2 O 3 , WO 3 , Fe 2 O 3 , and MoO 3 have been investigated for a long time in the development of conductometric gas sensors [43]. Their low cost, easy production, chemical stability, and suitable electrical properties played a key role in the commercialization of MOX devices, in particular those based on SnO 2 and ZnO in the past fifty years [14].…”

Section: Thin 2d Metal Oxidesmentioning

confidence: 99%

Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

113

View full text Add to dashboard Cite

Abstract:Since the first report of graphene, thin two-dimensional (2D) nanomaterials with atomic or molecular thicknesses have attracted great research interest for gas sensing applications. This was due to the distinctive physical, chemical, and electronic properties related to their ultrathin thickness, which positively affect the gas sensing performances. This feature article discusses the latest developments in this field, focusing on the properties, preparation, and sensing applications of thin 2D inorganic nanomaterials such as single-or few-layer layered double hydroxides/transition metal oxides/transition metal dichalcogenides. Recent studies have shown that thin 2D inorganic nanomaterials could provide monitoring of harmful/toxic gases with high sensitivity and a low concentration detection limit by means of conductometric sensors operating at relatively low working temperatures. Promisingly, by using these thin 2D inorganic nanomaterials, it may open a simple way of improving the sensing capabilities of conductometric gas sensors.

show abstract

Section: Thin 2d Metal Oxidesmentioning

confidence: 99%

Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

113

View full text Add to dashboard Cite

show abstract

“…Compared with other types of sensors, chemiresistive gas sensors have been extensively studied because of their remarkable advantages including low cost, simple fabrication, high response, and easy integration with electronic circuits. To ensure high response and reversible operation of chemiresistive gas sensors, high operating temperatures of 150–400 °C are inevitably required for adsorption and desorption of target molecules on and off of the sensing materials . However, this high temperature degrades the sensor stability and lifetime due to thermally induced grain growth, which can damage interconnected electronics .…”

Section: Introductionmentioning

confidence: 99%

Ionic‐Activated Chemiresistive Gas Sensors for Room‐Temperature Operation

Song

Shim

Suh

et al. 2019

Small

View full text Add to dashboard Cite

extensively studied because of their remarkable advantages including low cost, simple fabrication, high response, and easy integration with electronic circuits. To ensure high response and reversible operation of chemiresistive gas sensors, high operating temperatures of 150-400 °C are inevitably required for adsorption and desorption of target molecules on and off of the sensing materials. [3,4] However, this high temperature degrades the sensor stability and lifetime due to thermally induced grain growth, which can damage interconnected electronics. [5,6] Moreover, high power consumption (over ≈100 mW) is required, which must be decreased for the development of future battery-powered wireless sensors for applications to the IoT. [7] To design high performance gas sensors that operate at room temperature, a variety of approaches including self-heating, ultraviolet (UV)-assisted measurements, and 2D materials have been used for high stability and low power consumption. [8][9][10] Despite these extensive efforts, challenges remain including poor response and incomplete recovery because of the restricted modulation in electronic conductivity by insufficient reaction energy between the analytes and sensing materials. Recently, the utilization of humidity has been reported as an effective method for improving gas sensing performance at low temperatures.The development of high performance gas sensors that operate at room temperature has attracted considerable attention. Unfortunately, the conventional mechanism of chemiresistive sensors is restricted at room temperature by insufficient reaction energy with target molecules. Herein, novel strategy for room temperature gas sensors is reported using an ionic-activated sensing mechanism. The investigation reveals that a hydroxide layer is developed by the applied voltages on the SnO 2 surface in the presence of humidity, leading to increased electrical conductivity. Surprisingly, the experimental results indicate ideal sensing behavior at room temperature for NO 2 detection with sub-parts-per-trillion (132.3 ppt) detection and fast recovery (25.7 s) to 5 ppm NO 2 under humid conditions. The ionic-activated sensing mechanism is proposed as a cascade process involving the formation of ionic conduction, reaction with a target gas, and demonstrates the novelty of the approach. It is believed that the results presented will open new pathways as a promising method for room temperature gas sensors. Sensors/BiosensorsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

show abstract

“…The increased demand for highly sensitive, selective, cheap, low-power, reliable, stable, and portable sensors has stimulated extensive research to develop new sensing materials. Semiconducting metal oxides have long been considered promising candidates for gas-sensing applications because of their high sensitivity, easy fabrication methods, low cost, and high compatibility with other parts and processes [2][3][4]. Different types of metal oxide such as ZnO, SnO 2 , TiO 2 , In 2 O 3 , WO 3 , TeO 2 , CuO, CdO, Fe 2 O 3 , and MoO 3 have been developed and employed in the fabrication of gas sensors and it was found that chemical components, surface state, morphology, and microstructure play important roles in gas-sensing performance [5].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Leonardi

2017

Chemosensors

159

View full text Add to dashboard Cite

Two-dimensional (2D) nanomaterials, due to their unique physical and chemical properties, are showing great potential in catalysis and electronic/optoelectronic devices. Moreover, thanks to the high surface to volume ratio, 2D materials provide a large specific surface area for the adsorption of molecules, making them efficient in chemical sensing applications. ZnO, owing to its many advantages such as high sensitivity, stability, and low cost, has been one of the most investigated materials for gas sensing. Many ZnO nanostructures have been used to fabricate efficient gas sensors for the detection of various hazardous and toxic gases. This review summarizes most of the research articles focused on the investigation of 2D ZnO structures including nanosheets, nanowalls, nanoflakes, nanoplates, nanodisks, and hierarchically assembled nanostructures as a sensitive material for conductometric gas sensors. The synthesis of the materials and the sensing performances such as sensitivity, selectivity, response, and recovery times as well as the main influencing factors are summarized for each work. Moreover, the effect of mainly exposed crystal facets of the nanostructures on sensitivity towards different gases is also discussed.

show abstract

Semiconductor metal oxide compounds based gas sensors: A literature review

Cited by 116 publications

References 77 publications

Thin 2D: The New Dimensionality in Gas Sensing

Thin 2D: The New Dimensionality in Gas Sensing

Ionic‐Activated Chemiresistive Gas Sensors for Room‐Temperature Operation

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Contact Info

Product

Resources

About