High-performance gas sensor array for indoor air quality monitoring: the role of Au nanoparticles on WO3, SnO2, and NiO-based gas sensors

2021 ◽  
Author(s):  
Jinho Lee ◽  
Youngmo Jung ◽  
Seung-Hyun Sung ◽  
Gilho Lee ◽  
Jungmo Kim ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Indoor Air ◽  
High Performance ◽  
Sensor Array ◽  
Au Nanoparticles ◽  
Air Quality Monitoring ◽  
Gas Sensor Array

The 3 × 3 gas sensor array with different metal oxides and morphologies is fabricated to compare the sensitization effects of Au nanoparticles on various metal oxides and gases.The 3 × 3 gas sensor array with different metal oxides and morphologies is fabricated to compare the sensitization effects of Au nanoparticles on various metal oxides and gases.

Linear temperature microhotplate gas sensor array for automotive cabin air quality monitoring

2008 ◽  
Vol 134 (2) ◽  
pp. 660-665 ◽  
Author(s):  
L. Francioso ◽  
A. Forleo ◽  
A.M. Taurino ◽  
P. Siciliano ◽  
L. Lorenzelli ◽  
...  
Keyword(s):  
Air Quality ◽  
Gas Sensor ◽  
Sensor Array ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Linear Temperature ◽  
Gas Sensor Array ◽  
Cabin Air Quality

Design and Development of the Stability Test System for Gas Sensor Array Based on ARM

2013 ◽  
Vol 798-799 ◽  
pp. 553-556
Author(s):  
Tao Zhou ◽  
Qing Zhou
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Sensor Array ◽  
Low Cost ◽  
Industrial Applications ◽  
Test System ◽  
Stability Test ◽  
Stability Parameters ◽  
Gas Sensor Array ◽  
The Stability

In order to eliminate or minimize the early instability of gas sensors, the aging process is needed. After aging,it is necessary to test stability parameters of gas sensors in a certain batch of the sensors for massive production. In this work, a system for the stability test of gas sensor array has been designed and developed both in hardware and software based ARM. Measurements demonstrate the quality and flexibility of it. It is low cost, excellent cost performance. The stability test system now works well in industrial applications and meets the need of industrial mass-production.

scholarly journals Application of an Array of Metal-Oxide Semiconductor Gas Sensors in an Assistant Personal Robot for Early Gas Leak Detection

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1957 ◽  
Author(s):  
Jordi Palacín ◽  
David Martínez ◽  
Eduard Clotet ◽  
Tomàs Pallejà ◽  
Javier Burgués ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Mobile Robot ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Sensor Array ◽  
Low Cost ◽  
Gas Sensor Array ◽  
Gas Leak ◽  
Detection Capabilities ◽  
Personal Robot

This paper proposes the application of a low-cost gas sensor array in an assistant personal robot (APR) in order to extend the capabilities of the mobile robot as an early gas leak detector for safety purposes. The gas sensor array is composed of 16 low-cost metal-oxide (MOX) gas sensors, which are continuously in operation. The mobile robot was modified to keep the gas sensor array always switched on, even in the case of battery recharge. The gas sensor array provides 16 individual gas measurements and one output that is a cumulative summary of all measurements, used as an overall indicator of a gas concentration change. The results of preliminary experiments were used to train a partial least squares discriminant analysis (PLS-DA) classifier with air, ethanol, and acetone as output classes. Then, the mobile robot gas leak detection capabilities were experimentally evaluated in a public facility, by forcing the evaporation of (1) ethanol, (2) acetone, and (3) ethanol and acetone at different locations. The positive results obtained in different operation conditions over the course of one month confirmed the early detection capabilities of the proposed mobile system. For example, the APR was able to detect a gas leak produced inside a closed room from the external corridor due to small leakages under the door induced by the forced ventilation system of the building.

Single Chip Gas Sensor Array for Air Quality Monitoring

2017 ◽  
Vol 26 (2) ◽  
pp. 433-439 ◽  
Author(s):  
Chandra Shekhar Prajapati ◽  
Rohith Soman ◽  
S B Rudraswamy ◽  
Manjunatha Nayak ◽  
Navakanta Bhat
Keyword(s):  
Air Quality ◽  
Gas Sensor ◽  
Sensor Array ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Single Chip ◽  
Gas Sensor Array

scholarly journals Active-matrix monolithic gas sensor array based on MoS2 thin-film transistors

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Sehwan Kim ◽  
Heekyeong Park ◽  
Sooho Choo ◽  
Seongho Baek ◽  
Yena Kwon ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Thin Film Transistors ◽  
Active Sites ◽  
Sensor Array ◽  
Electrical Performance ◽  
Detection Range ◽  
Active Matrix ◽  
Gas Sensor Array

AbstractHighly sensitive and system integrable gas sensors play a significant role in industry and daily life, and MoS2 has emerged as one of the most promising two-dimensional nanomaterials for gas sensor technology. In this study, we demonstrate a scalable and monolithically integrated active-matrix gas sensor array based on large-area bilayer MoS2 films synthesized via two-successive steps: radio-frequency magnetron sputtering and thermal sulfurization. The fabricated thin-film transistors exhibit consistent electrical performance over a few centimeters area and resulting gas sensors detect NO2 with ultra-high sensitivity across a wide detection range, from 1 to 256 ppm. This is due to the abundant grain boundaries of the sputtered MoS2 channel, which perform as active sites for absorption of NO2 gas molecules. The demonstrated active-matrix gas sensor arrays display good switching capabilities and are anticipated to be readily integrated with additional circuitry for different gas sensing and monitoring applications.

Metal-oxide based ammonia gas sensors: A review

2020 ◽  
Vol 10 ◽  
Author(s):  
Priya Gupta ◽  
Savita Maurya ◽  
Narendra Kumar Pandey ◽  
Vernica Verma
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Review Paper ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Ammonia Gas Sensors

: This review paper encompasses a study of metal-oxide and their composite based gas sensors used for the detection of ammonia (NH3) gas. Metal-oxide has come into view as an encouraging choice in the gas sensor industry. This review paper focuses on the ammonia sensing principle of the metal oxides. It also includes various approaches adopted for increasing the gas sensitivity of metal-oxide sensors. Increasing the sensitivity of the ammonia gas sensor includes size effects and doping by metal or other metal oxides which will change the microstructure and morphology of the metal oxides. Different parameters that affect the performances like sensitivity, stability, and selectivity of gas sensors are discussed in this paper. Performances of the most operated metal oxides with strengths and limitations in ammonia gas sensing application are reviewed. The challenges for the development of high sensitive and selective ammonia gas sensor are also discussed.

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