High-performance gas sensors based on a thiocyanate ion-doped organometal halide perovskite

2017 ◽  
Vol 19 (20) ◽  
pp. 12876-12881 ◽  
Author(s):  
Yue Zhuang ◽  
Wenjing Yuan ◽  
Liu Qian ◽  
Shan Chen ◽  
Gaoquan Shi
Keyword(s):  
Nitrogen Dioxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Thiocyanate Ion ◽  
Improved Stability ◽  
Organometal Halide Perovskite ◽  
Good Repeatability ◽  
Acetone Vapour ◽  
Halide Perovskite

A gas sensor based on a thiocyanate ion-doped organometal halide perovskite can sensitively and selectively detect acetone vapour and nitrogen dioxide with good repeatability and improved stability.

Multifunctional zinc oxide thin films for high-performance UV photodetectors and nitrogen dioxide gas sensors

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 25641-25650 ◽  
Author(s):  
S. K. Shaikh ◽  
V. V. Ganbavle ◽  
S. I. Inamdar ◽  
K. Y. Rajpure
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Zinc Oxide ◽  
Nitrogen Dioxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Zno Thin Film ◽  
Uv Photodetector ◽  
Uv Photodetectors

Multifunctional use of ZnO thin film as NO2 gas sensor and UV photodetector.

High performance gas sensors with dual response based on organic ambipolar transistors

2021 ◽  
Author(s):  
Xu Zhou ◽  
Zi Wang ◽  
Ruxin Song ◽  
Yadan Zhang ◽  
Lunan Zhu ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Dual Response

A high performance organic ambipolar transistor-based gas sensor was constructed. It demonstrates dual response features and good selectivity.

scholarly journals Advanced Micro- and Nano-Gas Sensor Technology: A Review

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1285 ◽  
Author(s):  
Haleh Nazemi ◽  
Aashish Joseph ◽  
Jaewoo Park ◽  
Arezoo Emadi
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Sensor Arrays ◽  
Sensor Technology ◽  
Sensor Design ◽  
Fabrication Technology ◽  
Nano Fabrication ◽  
Wide Range ◽  
Gas Sensor Arrays

Micro- and nano-sensors lie at the heart of critical innovation in fields ranging from medical to environmental sciences. In recent years, there has been a significant improvement in sensor design along with the advances in micro- and nano-fabrication technology and the use of newly designed materials, leading to the development of high-performance gas sensors. Advanced micro- and nano-fabrication technology enables miniaturization of these sensors into micro-sized gas sensor arrays while maintaining the sensing performance. These capabilities facilitate the development of miniaturized integrated gas sensor arrays that enhance both sensor sensitivity and selectivity towards various analytes. In the past, several micro- and nano-gas sensors have been proposed and investigated where each type of sensor exhibits various advantages and limitations in sensing resolution, operating power, response, and recovery time. This paper presents an overview of the recent progress made in a wide range of gas-sensing technology. The sensing functionalizing materials, the advanced micro-machining fabrication methods, as well as their constraints on the sensor design, are discussed. The sensors’ working mechanisms and their structures and configurations are reviewed. Finally, the future development outlook and the potential applications made feasible by each category of the sensors are discussed.

scholarly journals Nitrogen Dioxide Gas Sensor Based on Ag-Doped Graphene: A First-Principle Study

Chemosensors ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 227
Author(s):  
Qichao Li ◽  
Yamin Liu ◽  
Di Chen ◽  
Jianmin Miao ◽  
Xiao Zhi ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Density Functional ◽  
Noble Metals ◽  
Gas Sensing ◽  
Mulliken Charge ◽  
Chronic Obstructive ◽  
Doped Graphene ◽  
The Impact

High-performance tracking trace amounts of NO2 with gas sensors could be helpful in protecting human health since high levels of NO2 may increase the risk of developing acute exacerbation of chronic obstructive pulmonary disease. Among various gas sensors, Graphene-based sensors have attracted broad attention due to their sensitivity, particularly with the addition of noble metals (e.g., Ag). Nevertheless, the internal mechanism of improving the gas sensing behavior through doping Ag is still unclear. Herein, the impact of Ag doping on the sensing properties of Graphene-based sensors is systematically analyzed via first principles. Based on the density-functional theory (DFT), the adsorption behavior of specific gases (NO2, NH3, H2O, CO2, CH4, and C2H6) on Ag-doped Graphene (Ag–Gr) is calculated and compared. It is found that NO2 shows the strongest interaction and largest Mulliken charge transfer to Ag–Gr among these studied gases, which may directly result in the highest sensitivity toward NO2 for the Ag–Gr-based gas sensor.

A MEMS-Based Ionization Gas Sensor with ZnO Nanorods Coated Distributed Micro-Discharge Structure

2014 ◽  
Vol 551 ◽  
pp. 460-465
Author(s):  
Mao Bo Fang ◽  
Xiao Lin Zhao ◽  
Jian Hua Li ◽  
Zi Wang ◽  
Yan Fang Wang ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Zno Nanorods ◽  
Polarization Structure ◽  
Sensor Device ◽  
Discharge Structure ◽  
Mems Technology ◽  
Anode Electrode ◽  
Good Repeatability ◽  
Structure Array

A kind of ionization gas sensor based on the polarization structure was designed and manufactured by MEMS technology. The gas sensor device consists of 3 main parts: the anode electrode, the cathode and the distributed polarization structure array which lie between the former two parts. All parts were coated with ZnO nanorods by a two-step hydrothermal method. Different concentration acetone gas was tested using the device. The results support that the ionization gas sensors exhibit reasonable sensitivity and good repeatability at the applied voltages lower than 4V.

scholarly journals Encapsulation Process and Materials Evaluation for E-Textile Gas Sensor

Proceedings ◽  
2019 ◽  
Vol 32 (1) ◽  
pp. 8
Author(s):  
Ashwini Valavan ◽  
Komolafe ◽  
Harris ◽  
Beeby
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Dioxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Sensor Response ◽  
Vehicular Emissions ◽  
Pollution Levels ◽  
Encapsulation Process ◽  
Novel Method ◽  
Exposure Levels

The degree of pollution in the environment increases because of the vehicular emissions such as carbon monoxide (CO) and nitrogen dioxide (NO2) gases. To minimize the exposure levels, it is necessary for individuals to be able to determine for themselves the pollution levels of the environments they are in so that they can take the necessary precautions. Textile-based gas sensors are an emerging solution and this paper furthers the concept by investigating a novel method for encapsulating gas sensors in textiles. While encapsulation is required to improve the durability and lifetime of the sensors, it essential for their operation that the encapsulants do not reduce the sensitivity of the gas sensor. This paper investigates the selectivity of two different flexible and breathable thermoplastic encapsulants (Platilon®U and Zitex G-104) for sensing carbon monoxide by observing the sensor response with and without the encapsulants. Results show that while the encapsulants both enable the sensor to still function, Platilon®U reduces the sensor sensitivity, whereas Zitex G-104 has very little effect.

Interfacial modifying layer-driven high-performance organic thin-film transistors and their nitrogen dioxide gas sensors

2017 ◽  
Vol 49 ◽  
pp. 334-339 ◽  
Author(s):  
Xinming Zhuang ◽  
Wei Huang ◽  
Shijiao Han ◽  
Yiming Jiang ◽  
Huajing Zheng ◽  
...  
Keyword(s):  
Thin Film ◽  
Nitrogen Dioxide ◽  
Gas Sensors ◽  
Thin Film Transistors ◽  
High Performance ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film

scholarly journals Degradation mechanism of a high-performance real micro gas sensor, as determined by spatially resolved XAFS

2016 ◽  
Vol 18 (10) ◽  
pp. 7374-7380
Author(s):  
Takahiro Wada ◽  
Naoyoshi Murata ◽  
Hiromitsu Uehara ◽  
Takuya Suzuki ◽  
Hiroaki Nitani ◽  
...  
Keyword(s):  
Fine Structure ◽  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Degradation Mechanism ◽  
Atomic Scale ◽  
X Ray ◽  
Spatially Resolved ◽  
Micro Gas Sensor ◽  
X Ray Absorption

Of late, battery-driven high-performance gas sensors have gained acceptability in practical usage, whose atomic-scale structure has been revealed by μ-fluorescence X-ray absorption fine structure analysis.

UV-enhanced NO2 gas sensors based on In2O3/ZnO composite material modified by polypeptides

2021 ◽  
Author(s):  
Zhihua Ying ◽  
Teng Zhang ◽  
Chao Feng ◽  
Fei Wen ◽  
Lili Li ◽  
...  
Keyword(s):  
Composite Material ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Active Sites ◽  
High Performance ◽  
Gas Sensing ◽  
Uv Light ◽  
Gas Concentration ◽  
One Step ◽  
Strong Linear Relationship

Abstract This present study reported a high-performance gas sensor, based on In2O3/ZnO composite material modified by polypeptides, with a high sensibility to NO2, where the In2O3/ZnO composite was prepared by a one-step hydrothermal method. A series of results through material characterization technologies showed the addition of polypeptides can effectively change the morphology and size of In2O3/ZnO crystals, and effectively improve the sensing performance of the gas sensors. Due to the single shape and small size, In2O3/ZnO composite modified by polypeptides increased the active sites on the surface. At the same time, the gas sensing properties of four different ratios of polypeptide-modified In2O3/ZnO gas sensors were tested. It was found that the In2O3/ZnO-10 material showed the highest response, excellent selectivity, and good stability at room temperature under UV light. In addition, the response of the In2O3/ZnO-10 gas sensor showed a strong linear relationship with the NO2 gas concentration. When the NO2 gas concentration was 20 ppm, the response time was as quick as 19s, and the recovery time was 57s. Finally, based on the obtained experimental characterization results and energy band structure analysis, a possible gas sensing mechanism is proposed.

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