scholarly journals Room-temperature hydrogen sensing performance of Nb2O5 nanorod arrays

RSC Advances ◽  
2018 ◽  
Vol 8 (30) ◽  
pp. 16897-16901 ◽  
Author(s):  
Yanan Zou ◽  
Jing He ◽  
Yongming Hu ◽  
Rui Huang ◽  
Zhao Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Hydrogen Sensor ◽  
Nanorod Arrays ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Sensing Performance

A hydrogen sensor based on Nb2O5 nanorod arrays was synthesized and exhibited a fast and highly-sensitive response at room temperature.

Highly-sensitive, fast hydrogen sensing employing Pt-coated TiO2 nanotube arrays

2014 ◽  
Vol 07 (03) ◽  
pp. 1450021 ◽  
Author(s):  
Kansong Chen ◽  
Kun Xie ◽  
Xinran Feng ◽  
Han Tian ◽  
Rui Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Hydrogen Sensor ◽  
Nanotube Arrays ◽  
Platinum Electrodes ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Order Of Magnitude ◽  
Hydrogen Response ◽  
The Subject ◽  
Glycol Solution

Highly ordered TiO 2 nanotube arrays were fabricated by anodization in an ethylene glycol solution containing NH 4 F . A pair of platinum electrodes was deposited on the surface of the nanotube layer to fabricate a Pt / TiO 2 nanotube arrays hydrogen sensor. The subject sensors exhibited a seven order of magnitude change in resistance with a response time of 13 s at room temperature upon exposure to 2000 ppm (parts per million) hydrogen. We investigated the hydrogen response of the Pt / TiO 2 sensors as a function of the length of the nanotubes and compared their activity with that of a reference film.

scholarly journals The Role of ALD-ZnO Seed Layers in the Growth of ZnO Nanorods for Hydrogen Sensing

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 491 ◽  
Author(s):  
Yangming Lu ◽  
Chiafen Hsieh ◽  
Guanci Su
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Gas Sensing ◽  
Zno Nanorods ◽  
Clean Energy ◽  
Hydrogen Sensor ◽  
Zno Films ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Seed Layers

Hydrogen is one of the most important clean energy sources of the future. Because of its flammability, explosiveness, and flammability, it is important to develop a highly sensitive hydrogen sensor. Among many gas sensing materials, zinc oxide has excellent sensing properties and is therefore attracting attention. Effectively reducing the resistance of sensing materials and increasing the surface area of materials is an important issue to increase the sensitivity of gas sensing. Zinc oxide seed layers were prepared by atomic layer deposition (ALD) to facilitate the subsequent hydrothermal growth of ZnO nanorods. The nanorods are used as highly sensitive materials for sensing hydrogen due to their inherent properties as oxide semiconductors and their very high surface areas. The low resistance value of ALD-ZnO helps to transport electrons when sensing hydrogen gas and improves the sensitivity of hydrogen sensors. The large surface area of ZnO nanorods also provides lots of sites of gas adsorption which also increases the sensitivity of the hydrogen sensor. Our experimental results show that perfect crystallinity helped to reduce the electrical resistance of ALD-ZnO films. High areal nucleation density and sufficient inter-rod space were determining factors for efficient hydrogen sensing. The sensitivity increased with increasing hydrogen temperature, from 1.03 at 225 °C, to 1.32 at 380 °C after sensing 100 s in 10,000 ppm of hydrogen. We discuss in detail the properties of electrical conductivity, point defects, and crystal quality of ALD-ZnO films and their probable effects on the sensitivity of hydrogen sensing.

Improved room-temperature hydrogen sensing performance of directly formed Pd/WO3 nanocomposite

2014 ◽  
Vol 193 ◽  
pp. 28-34 ◽  
Author(s):  
Bin Liu ◽  
Daoping Cai ◽  
Yuan Liu ◽  
Dandan Wang ◽  
Lingling Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Hydrogen Sensing ◽  
Sensing Performance

Hydrogen sensing performance of TiO2 nanotubes at room temperature

2010 ◽  
Author(s):  
J. Y. Moon ◽  
I. Tuokko ◽  
A. Suominen ◽  
A. Tuominen ◽  
D. S. Oh ◽  
...  
Keyword(s):  
Room Temperature ◽  
Hydrogen Sensing ◽  
Sensing Performance

scholarly journals Palladium thin films for plasmonic hydrogen gas sensing

2019 ◽  
Vol 11 (2) ◽  
pp. 56
Author(s):  
Erwin Maciak
Keyword(s):  
Thin Films ◽  
Surface Plasmon Resonance ◽  
Low Temperature ◽  
Gas Sensor ◽  
Room Temperature ◽  
Fiber Optic ◽  
Hydrogen Sensor ◽  
Hydrogen Gas ◽  
Sensors And Actuators ◽  
Hydrogen Sensing

In this study, I prepared BK7 glass slides coated by palladium (Pd) layer by PVD technique. These samples have been employed as plasmon active structures in classic Kretschmann-based SPR set-up. The application of H2 sensing structures based on palladium plasmonic active thin films have been tested and investigated. Hydrogen sensing properties of Pd films were investigated at room temperature The reflectances of p-polarized light from Pd thin films as a function of angle of incidence and wavelength were measured in synthetic air (or nitrogen) and in gas mixtures including hydrogen. Variations of the reflectance in the presence of hydrogen gas at room temperature revealed that the samples can sense hydrogen in a wide range of concentration (0–2% vol/vol) without saturation behavior. The dynamic properties with various concentration of H2 at low temperature and dry gas mixtures was investigated and the effects of these factors on the hydrogen sensing properties were analyzed. Full Text: PDF ReferencesG. Korotcenkov, Handbook of Gas Sensor Materials: Properties, Advantages, and Shortcomings for Applications (Springer, New York 2013). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, "SAW hydrogen gas sensor based on WO3 and Pd nanostructures", Procedia Chemistry 1 (1), 200 (2009). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, T. Pustelny, "Bilayer Structures of NiOx and Pd in Surface Acoustic Wave and Electrical Gas Sensor Systems", Acta Physica Polonica A 116(3), 315 (2009). CrossRef E. Maciak, Z. Opilski, "Pd/V2O5 fiber optic hydrogen gas sensor", J. Phys. France IV 129, 137 (2005). CrossRef E. Maciak,. "Fiber optic sensor for H2 gas detection in the presence of methane based on Pd/WO3 low-coherence interferometric structure", Proc. SPIE 10455, UNSP 104550W (2017). CrossRef X. Bevenot, A. Truillet, C. Veillas, H. Gagnaire, M. Clement, "Hydrogen leak detection using an optical fibre sensor for aerospace applications", Sens. Actuators B 67, 57 (2000). CrossRef J. Homola, S.S. Yee, G. Gauglitz, "Surface plasmon resonance sensors: review", Sensors and Actuators B 54, 3 (1999). CrossRef H. Raether, Surface plasmons on smooth and rough surfaces and on gratings (Springer-Verlag, Berlin-Heidelberg 1988). CrossRef P. Tobiska, O. Hugon, A. Trouillet, H.Gagnarie, "An integrated optic hydrogen sensor based on SPR on palladium", Sensors and Actuators, B 74, 168 (2001). CrossRef Z. Opilski, E. Maciak, "Optical hydrogen sensor employing the phenomenon of the surface plasmons resonance in the palladium layer", Proc. SPIE 5576, 202 (2004). CrossRef T. Pustelny, E. Maciak, Z. Opilski, A. Piotrowska, E. Papis, K. Golaszewska, "Investigation of the ZnO sensing structure on NH3 action by means of the surface plasmon resonance method", European Physical Journal-Special Topics 154, 165 (2008). CrossRef E. Maciak, M. Procek, K. Kępska, A. Stolarczyk, "Study of optical and electrical properties of thin films of the conducting comb-like graft copolymer of polymethylsiloxane with poly(3-hexyltiophene) and poly(ethylene) glycol side chains for low temperature NO2 sensing", Thin Solid Films 618, 277 (2016). CrossRef

WO3-x Nanorod Arrays Based Sensors with High Sensitivity and Quick Response for Detecting Pollutants

2008 ◽  
Vol 1080 ◽  
Author(s):  
Xinpeng Wang ◽  
Jie Lou ◽  
Zhenbo Wang ◽  
Peter Xianping Feng
Keyword(s):  
Experimental Data ◽  
Recovery Time ◽  
Room Temperature ◽  
Operating Temperature ◽  
High Sensitivity ◽  
Two Dimensional ◽  
Quick Response ◽  
Nanorod Arrays ◽  
Highly Sensitive ◽  
Different Temperatures

ABSTRACTTungsten oxide nanorod arrays deposited on the cylindrical substrate have been used for fabrication of a two-dimensional (2D) sensor. The sensibility and capacity towards methane and acetone at different temperatures have been examined. Experimental data have indicated that the newly designed sensor is highly sensitive to methane with low cross sensitivity towards possible mixed organic gas acetone, relying on the operating temperature. At room temperature (20°C), a quick response time and recovery time of the sensor, less than 10 ms, have been obtained.

A flexible VOCs sensor based on a 3D Mxene framework with a high sensing performance

2018 ◽  
Vol 6 (37) ◽  
pp. 18116-18124 ◽  
Author(s):  
Wenjing Yuan ◽  
Kai Yang ◽  
Huifen Peng ◽  
Fang Li ◽  
Fuxing Yin
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Sensitive Detection ◽  
Sensing Range ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Sensing Performance

3D Mxene based gas sensors demonstrated a highly sensitive detection for VOCs in an ultra-wide sensing range at room temperature.

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