Near Room Temperature, Fast-Response, and Highly Sensitive Triethylamine Sensor Assembled with Au-Loaded ZnO/SnO2Core–Shell Nanorods on Flat Alumina Substrates

2015 ◽  
Vol 7 (34) ◽  
pp. 19163-19171 ◽  
Author(s):  
Dian-Xing Ju ◽  
Hong-Yan Xu ◽  
Zhi-Wen Qiu ◽  
Zi-Chao Zhang ◽  
Qi Xu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fast Response ◽  
Highly Sensitive

A chemiresistor sensor modified with lanthanum oxide nanoparticles as a highly sensitive and selective sensor for dimethylamine at room temperature

2020 ◽  
Vol 44 (12) ◽  
pp. 4927-4934
Author(s):  
Mohammad Reza Sovizi ◽  
Somayeh Mirzakhani
Keyword(s):  
Recovery Time ◽  
High Stability ◽  
Room Temperature ◽  
Lanthanum Oxide ◽  
Fast Response ◽  
Manufacturing Cost ◽  
Highly Sensitive ◽  
Low Energy Consumption ◽  
Interdigitated Microelectrode ◽  
Selective Sensor

An interdigitated microelectrode coated with La2O3 metal oxide for the detection of dimethylamine gas has high stability in response, fast response, low recovery time, low energy consumption and low manufacturing cost.

scholarly journals Observation of CO Detection Using Aluminum-Doped ZnO Nanorods on Microcantilever

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2013 ◽  
Author(s):  
Ratno Nuryadi ◽  
Lia Aprilia ◽  
Makoto Hosoda ◽  
Mohamad Abdul Barique ◽  
Arief Udhiarto ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Gas Flow ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Fast Response ◽  
Gas Detectors ◽  
Resonant Frequency Shift ◽  
Highly Sensitive ◽  
Doped Zno ◽  
Co Gas

An oscillating piezoresistive microcantilever (MC) coated with an aluminum (Al)-doped zinc oxide (ZnO) nanorods was used to detect carbon monoxide (CO) in air at room temperature. Al-doped ZnO nanorods were grown on the MC surface using the hydrothermal method, and a response to CO gas was observed by measuring a resonant frequency shift of vibrated MC. CO gas response showed a significant increase in resonant frequency, where sensitivity in the order of picogram amounts was obtained. An increase in resonant frequency was also observed with increasing gas flow rate, which was simultaneously followed by a decrease in relative humidity, indicating that the molecular interface between ZnO and H2O plays a key role in CO absorption. The detection of other gases of carbon compounds such as CO2 and CH4 was also performed; the sensitivity of CO was found to be higher than those gases. The results demonstrate the reversibility and reproducibility of the proposed technique, opening up future developments of highly sensitive CO-gas detectors with a fast response and room temperature operation.

scholarly journals A Novel Type Room Temperature Surface Photovoltage Gas Sensor Device

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2919 ◽  
Author(s):  
Monika Kwoka ◽  
Michal Borysiewicz ◽  
Pawel Tomkiewicz ◽  
Anna Piotrowska ◽  
Jacek Szuber
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Signal To Noise Ratio ◽  
Fast Response ◽  
Surface Photovoltage ◽  
Kelvin Probe ◽  
Sensor Device ◽  
Sensing Material ◽  
Highly Sensitive

In this paper a novel type of a highly sensitive gas sensor device based on the surface photovoltage effect is described. It is based on the Kelvin probe approach. Porous ZnO nanostructured thin films deposited by the direct current (DC) reactive magnetron sputtering method are used as the active gas sensing electrode material. Crucially, the obtained gas sensing material exhibited a nanocoral surface morphology and surface Zn to O non-stoichiometry with respect to its bulk mass. Among other responses, the demonstrated SPV gas sensor device exhibits a high response to an NO2 concentration as low as 1 ppm, with a signal to noise ratio of about 50 and a fast response time of several seconds under room temperature conditions.

scholarly journals Superior gas-sensing performance of amorphous CdO nanoflake arrays prepared at room temperature

2016 ◽  
Vol 4 (22) ◽  
pp. 8700-8706 ◽  
Author(s):  
Ye-Qing Zhang ◽  
Zhe Li ◽  
Tao Ling ◽  
Sergei A. Kulinich ◽  
Xi-Wen Du
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Room Temperature ◽  
Gas Sensing ◽  
Fast Response ◽  
Selective Detection ◽  
Safety Requirements ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Sensing Performance

Highly sensitive and selective detection of volatile organic compounds (VOCs) with fast response time is imperative based on safety requirements, yet often remains a challenge.

Controlled Growth and Characterization Ag/ZnO Nanotetrapods for Humidity Sensing

2018 ◽  
Vol 21 (7) ◽  
pp. 462-467
Author(s):  
Babak Sadeghi
Keyword(s):  
Room Temperature ◽  
Zinc Complex ◽  
Water Solution ◽  
Particle Morphology ◽  
Quick Response ◽  
Separation System ◽  
Humidity Sensing ◽  
Sensor Material ◽  
Highly Sensitive

Aim and Objective: Ultrafine Ag/ZnO nanotetrapods (AZNTP) have been prepared successfully using silver (I)–bis (oxalato) zinc complex and 1, 3-diaminopropane (DAP) with a phase separation system, and have been injected into a diethyl/water solution. Materials and Methods: This crystal structure and lattice constant of the AZNTP obtained were investigated by means of a SEM, XRD, TEM and UV-vis spectrum. Results: The results of the present study demonstrated the growth and characterization AZNTP for humidity sensing and DAP plays a key role in the determination of particle morphology. AZNTP films with 23 nm in arm diameter have shown highly sensitive, quick response sensor material that works at room temperature.

scholarly journals Gold and ZnO-Based Metal-Semiconductor Network for Highly Sensitive Room-Temperature Gas Sensing

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3815
Author(s):  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
Joel Ljunggren ◽  
Håkan Olin
Keyword(s):  
Solar Cells ◽  
Gas Sensor ◽  
Network Structure ◽  
Room Temperature ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Gold Particles ◽  
Highly Sensitive ◽  
Semiconductor Electronics ◽  
New Type

Metal-semiconductor junctions and interfaces have been studied for many years due to their importance in applications such as semiconductor electronics and solar cells. However, semiconductor-metal networks are less studied because there is a lack of effective methods to fabricate such structures. Here, we report a novel Au–ZnO-based metal-semiconductor (M-S)n network in which ZnO nanowires were grown horizontally on gold particles and extended to reach the neighboring particles, forming an (M-S)n network. The (M-S)n network was further used as a gas sensor for sensing ethanol and acetone gases. The results show that the (M-S)n network is sensitive to ethanol (28.1 ppm) and acetone (22.3 ppm) gases and has the capacity to recognize the two gases based on differences in the saturation time. This study provides a method for producing a new type of metal-semiconductor network structure and demonstrates its application in gas sensing.

Fast-Response X-ray Detector Based on Nanocrystalline Ga2O3 Thin Film Prepared at Room Temperature

2021 ◽  
pp. 149619
Author(s):  
Manni Chen ◽  
Zhipeng Zhang ◽  
Runze Zhan ◽  
Juncong She ◽  
Shaozhi Deng ◽  
...  
Keyword(s):  
Thin Film ◽  
Room Temperature ◽  
Fast Response ◽  
X Ray ◽  
Ga2o3 Thin Film

Ultraviolet light-emitting diode-assisted highly sensitive room temperature NO2 gas sensor for low-temperature solution-processed ZnO/TiO2 nanorods decorated with plasmonic Au nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Soon-Hwan Kwon ◽  
Tae-Hyeon Kim ◽  
Sang-Min Kim ◽  
Semi Oh ◽  
Kyoung-Kook Kim
Keyword(s):  
Gas Sensors ◽  
High Performance ◽  
Room Temperature ◽  
Au Nanoparticles ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
No2 Gas Sensor ◽  
Highly Sensitive ◽  
Temperature Solution ◽  
Semiconducting Metal Oxides

Nanostructured semiconducting metal oxides such as SnO2, ZnO, TiO2, and CuO have been widely used to fabricate high performance gas sensors. To improve the sensitivity and stability of gas sensors,...

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