Enhanced photoconductivity of a polyoxometalate–TiO2 composite for gas sensing applications

2015 ◽  
Vol 3 (24) ◽  
pp. 6153-6157 ◽  
Author(s):  
Zhixia Sun ◽  
Yuzhuo Zhang ◽  
Na Li ◽  
Lin Xu ◽  
Tianqi Wang
Keyword(s):  
Gas Sensing ◽  
Sensing Applications ◽  
Sensing Performance

The polyoxometalates and TiO2 composite displayed better photoconductivity and gas sensing performance for acetone than pristine TiO2.

Polymer Coated Microfabricated Interdigitated Electrodes Arrays for Gas Sensing Applications

2011 ◽  
Vol 495 ◽  
pp. 87-90
Author(s):  
P. Oikonomou ◽  
K. Manoli ◽  
D. Goustouridis ◽  
A. Botsialas ◽  
E. Valamontes ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensor Arrays ◽  
Interdigitated Electrodes ◽  
Sensing Applications ◽  
Quartz Substrates ◽  
Sensing Performance

InterDigitated Capacitive (IDC) sensor arrays are fabricated with conventional microelectronics-micromachining technologies on quartz substrates. After fabrication, a polymeric well is patterned around each IDC to precisely define the sensing area and thus deposit coatings of various polymers, by drop casting, in a reproducible and controlled manner. The gas sensing performance of the IDC array is presented for humidity and p-xylene.

scholarly journals Gas sensing performance at room temperature of nanogap interdigitated electrodes for detection of acetone at low concentration

RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50279-50286 ◽  
Author(s):  
Q. Nguyen Minh ◽  
H. D. Tong ◽  
A. Kuijk ◽  
F. van de Bent ◽  
P. Beekman ◽  
...  
Keyword(s):  
Large Scale ◽  
Room Temperature ◽  
Gas Sensing ◽  
Fabrication Technology ◽  
Micro Fabrication ◽  
Interdigitated Electrodes ◽  
Low Concentration ◽  
Sensing Applications ◽  
Nanogap Electrodes ◽  
Sensing Performance

A facile approach for the fabrication of large-scale interdigitated nanogap electrodes (nanogap IDEs) with a controllable gap was demonstrated with conventional micro-fabrication technology to develop chemocapacitors for gas sensing applications.

Submicrochains composed of massage ball-like WO3@CuWO4 composites for high-efficiency CO gas sensing applications at room temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 69999-70007 ◽  
Author(s):  
Linlin Wang ◽  
Afrasiab Ur Rehman ◽  
Hongyuan Wu ◽  
Baofeng Wu ◽  
Li Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Gas Sensing ◽  
Sensing Applications ◽  
Sensing Performance ◽  
Co Gas

Submicrochains composed of massage ball-like WO3@CuWO4 have been prepared via a simple Cu2+ intercalation method. WO3@CuWO4 submicrochains sensors displayed excellent sensing performance to CO gas at room temperature.

scholarly journals C2H5OH and NO2 sensing properties of ZnO nanostructures: correlation between crystal size, defect level and sensing performance

RSC Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 5629-5639 ◽  
Author(s):  
Chu Thi Quy ◽  
Nguyen Xuan Thai ◽  
Nguyen Duc Hoa ◽  
Dang Thi Thanh Le ◽  
Chu Manh Hung ◽  
...  
Keyword(s):  
Nitrogen Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Crystal Size ◽  
Gas Sensing ◽  
Zno Nanostructures ◽  
Defect Level ◽  
Sensing Applications ◽  
Sensing Performance

ZnO nanostructures were synthesized for ethanol and nitrogen dioxide gas-sensing applications. Results pointed out that the defect levels dominating the gas-sensing performance but not the morphology, specific surface area or crystal size.

scholarly journals Gallium Nitride (GaN) Nanostructures and Their Gas Sensing Properties: A Review

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3889 ◽  
Author(s):  
Md Ashfaque Hossain Khan ◽  
Mulpuri V. Rao
Keyword(s):  
Density Functional ◽  
Gas Sensing ◽  
Limit Of Detection ◽  
Performance Comparison ◽  
Machine Learning Algorithms ◽  
Sensing Applications ◽  
Ethanol Sensing ◽  
Carbon Dioxide Co2 ◽  
Nanostructured Sensors ◽  
Sensing Performance

In the last two decades, GaN nanostructures of various forms like nanowires (NWs), nanotubes (NTs), nanofibers (NFs), nanoparticles (NPs) and nanonetworks (NNs) have been reported for gas sensing applications. In this paper, we have reviewed our group’s work and the works published by other groups on the advances in GaN nanostructures-based sensors for detection of gases such as hydrogen (H2), alcohols (R-OH), methane (CH4), benzene and its derivatives, nitric oxide (NO), nitrogen dioxide (NO2), sulfur-dioxide (SO2), ammonia (NH3), hydrogen sulfide (H2S) and carbon dioxide (CO2). The important sensing performance parameters like limit of detection, response/recovery time and operating temperature for different type of sensors have been summarized and tabulated to provide a thorough performance comparison. A novel metric, the product of response time and limit of detection, has been established, to quantify and compare the overall sensing performance of GaN nanostructure-based devices reported so far. According to this metric, it was found that the InGaN/GaN NW-based sensor exhibits superior overall sensing performance for H2 gas sensing, whereas the GaN/(TiO2–Pt) nanowire-nanoclusters (NWNCs)-based sensor is better for ethanol sensing. The GaN/TiO2 NWNC-based sensor is also well suited for TNT sensing. This paper has also reviewed density-functional theory (DFT)-based first principle studies on the interaction between gas molecules and GaN. The implementation of machine learning algorithms on GaN nanostructured sensors and sensor array has been analyzed as well. Finally, gas sensing mechanism on GaN nanostructure-based sensors at room temperature has been discussed.

Mesoporous amorphous Al2O3/crystalline WO3 heterophase hybrids for electrocatalysis and gas sensing applications

2019 ◽  
Vol 7 (38) ◽  
pp. 21874-21883 ◽  
Author(s):  
Yidong Zou ◽  
Shibo Xi ◽  
Tao Bo ◽  
Xinran Zhou ◽  
Junhao Ma ◽  
...  
Keyword(s):  
Lattice Distortion ◽  
Gas Sensing ◽  
Sensing Applications ◽  
Amorphous Al2o3 ◽  
Sensing Performance

Unprecedented mesoporous amorphous–crystalline Al2O3/WO3 exhibit superior HER activity with addition of Al2O3 (>2%) while lower contents (<2%) show excellent sensing performance owing to hetero-interface and lattice distortion of the octahedron crystal.

Design and Fabrication of Low-Power Planar Type Gas Sensor

2011 ◽  
Vol 694 ◽  
pp. 580-584
Author(s):  
Zi Li Zhang ◽  
Chen Bo Yin ◽  
Chun Min Tao ◽  
Bin Zhu
Keyword(s):  
Low Power ◽  
Gas Sensing ◽  
Element Model ◽  
Low Power Consumption ◽  
Sensing Applications ◽  
Sensitive Film ◽  
Suspended Structure ◽  
Homogeneous Temperature ◽  
The Finite Element Model ◽  
Sensing Performance

In this paper we describe the fabrication steps and the implementation of a planar type gas sensing applications with suspended structure, which presents very low power consumption. Simulations with the finite element model tool show homogeneous temperature distribution across the sensitive film. The device attached with a spin-coated thin layer of SnO2 showed a reasonable sensing performance to hydrogen.

scholarly journals Graphene Oxide as a Sensing Material for Gas Detection Based on Nanomechanical Sensors in the Static Mode

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 82 ◽  
Author(s):  
Gaku Imamura ◽  
Kosuke Minami ◽  
Kota Shiba ◽  
Kissan Mistry ◽  
Kevin P. Musselman ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Surface Stress ◽  
Gas Sensing ◽  
Graphite Powder ◽  
Static Mode ◽  
Sensing Applications ◽  
Sensing Material ◽  
Sensing Platform ◽  
Sensing Performance ◽  
Nanomechanical Sensors

Graphene is a key material for gas sensing applications owing to its high specific surface area and vast chemical modification potential. To fully utilize the potential of graphene, a sensing platform independent of conductive properties is required. In this study, we employed membrane-type surface stress sensors (MSS)—A kind of nanomechanical sensor operated in the static mode—As a sensing platform and utilized graphene oxide (GO) as a gas sensing material. MSS detect surface stress caused by gas sorption; therefore, chemically modified graphene with low conductivity can be utilized as a gas sensing material. We evaluated the sensing performance of a GO-coated MSS by measuring its responses to five gases. We demonstrated with the GO-coated MSS the feasibility of GO as a gas sensing material for static mode nanomechanical sensors and revealed its high selectivity to water vapor. Moreover, we investigated the sensing mechanism of the GO-coated MSS by comparing it with the sensing performance of MSS coated with reduced graphene oxide and graphite powder and deduced key factors for sensitivity and selectivity. Considering the high sensitivity of the GO-coated MSS and the compact measurement system that MSS can realize, the present study provides a new perspective on the sensing applications of graphene.

First-principles calculations combined with experiments to study the gas-sensing performance of Zn-substituted SnS

2020 ◽  
Vol 22 (31) ◽  
pp. 17513-17522
Author(s):  
Yuxiang Qin ◽  
Peilun Qiu ◽  
Yinan Bai
Keyword(s):  
First Principles ◽  
Gas Sensing ◽  
Group Iv ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Dimensional Group ◽  
Sensing Applications ◽  
Sensing Performance

Two-dimensional group-IV monochalcogenides MX (M = Ge, and Sn; X = S, and Se) are explored for theirpotential in gas-sensing applications.

Effect of Grain Size on Strain in a Copper Oxide Nanofilm for Gas Sensing Applications

2019 ◽  
Vol 11 (5) ◽  
pp. 05040-1-05040-4
Author(s):  
Sumanta Kumar Tripathy ◽  
◽  
Sanjay Kumar ◽  
Divya Aparna Narava ◽  
◽  
...  
Keyword(s):  
Grain Size ◽  
Copper Oxide ◽  
Gas Sensing ◽  
Sensing Applications
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