A new type low-cost, flexible and wearable tertiary nanocomposite sensor for room temperature hydrogen gas sensing

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.

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Decorated CNT based on porous silicon for hydrogen gas sensing at room temperature

RSC Advances ◽

10.1039/c6ra03541h ◽

2016 ◽

Vol 6 (50) ◽

pp. 44410-44414 ◽

Cited By ~ 18

Author(s):

Hamid Ghorbani Shiraz ◽

Fatemeh Razi Astaraei ◽

Somayeh Fardindoost ◽

Zahra Sadat Hosseini

Keyword(s):

Porous Silicon ◽

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas

A new triple-component sensor for detection of H2 was developed based on porous silicon and CNTs.

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Room-temperature hydrogen gas sensing properties of the networked Cr2O3-functionalized Nb2O5 nanostructured sensor

Metals and Materials International ◽

10.1007/s12540-016-6028-3 ◽

2016 ◽

Vol 22 (4) ◽

pp. 730-736 ◽

Cited By ~ 7

Author(s):

Sunghoon Park ◽

Hyejoon Kheel ◽

Gun-Joo Sun ◽

Hyoun Woo Kim ◽

Taegyung Ko ◽

...

Keyword(s):

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas ◽

Sensing Properties ◽

Gas Sensing Properties ◽

Nanostructured Sensor

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Highly responsive hydrogen gas sensing by partially reduced graphite oxide thin films at room temperature

Carbon ◽

10.1016/j.carbon.2012.04.053 ◽

2012 ◽

Vol 50 (11) ◽

pp. 4061-4067 ◽

Cited By ~ 53

Author(s):

Jianwei Wang ◽

Youngreal Kwak ◽

In-yeal Lee ◽

Sunglyul Maeng ◽

Gil-Ho Kim

Keyword(s):

Thin Films ◽

Graphite Oxide ◽

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas ◽

Oxide Thin Films ◽

Reduced Graphite Oxide

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Hydrogen gas sensing performance of polyaniline/titania/nickel oxide nanocomposite at room temperature

Materials Science and Engineering B ◽

10.1016/j.mseb.2017.07.002 ◽

2017 ◽

Vol 224 ◽

pp. 40-47 ◽

Cited By ~ 1

Author(s):

Shahruz Nasirian ◽

Seyed Yaser Razavi

Keyword(s):

Nickel Oxide ◽

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas ◽

Sensing Performance

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Influence of Catalyst Loading Method on Titania-Based Optical Hydrogen Gas Sensing Properties

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.582.210 ◽

2013 ◽

Vol 582 ◽

pp. 210-213 ◽

Cited By ~ 1

Author(s):

Junichi Hamagami ◽

Ryo Araki ◽

Shohei Onimaru ◽

G. Kawamura ◽

Atsunori Matsuda

Keyword(s):

Palladium Catalyst ◽

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas ◽

Catalyst Loading ◽

Sensing Properties ◽

Precise Control ◽

Sensor Performance ◽

Loading Method ◽

Gas Sensing Properties

We reported that titania ceramic coating loaded with palladium catalyst worked as an optical hydrogen gas sensor at room temperature. The palladium metal of this sensor worked as a catalyst not only for room-temperature operation but also for high selectivity to hydrogen gas. Precise control of metal/ceramic interface between the titania and the palladium was very important in order to improve the sensor performance such as sensitivity, response time, recovery time. Influence of a difference in palladium-catalyst loading method (photodeposition and sputtering) on the optical hydrogen gas sensing properties for the titania-based sensor was investigated. It was found that the catalytic loading process significantly affected the optical hydrogen characteristics of the titania-based coating.

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ZnO-Based Gas Sensors Prepared by EPD and Hydrothermal Growth

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.654.94 ◽

2015 ◽

Vol 654 ◽

pp. 94-98 ◽

Cited By ~ 2

Author(s):

Roman Yatskiv ◽

María Verde ◽

Jan Grym

Keyword(s):

Gas Sensors ◽

Room Temperature ◽

Gas Sensing ◽

Low Cost ◽

Zno Nanorods ◽

Zno Films ◽

Nanorod Arrays ◽

Zno Nanorod Arrays ◽

Current Voltage ◽

Gas Sensing Properties

Arrays of vertically well aligned ZnO nanorods (NRs) were prepared on nanostructured ZnO films using a low temperature hydrothermal method. We propose the use of the low cost, environmentally friendly electrophoretic deposition technique (EPD) as seeding procedure, which allows the obtaining of homogeneous, well oriented nanostructured ZnO thin films. ZnO nanorod arrays were covered with graphite in order to prepare graphite/ZnO NRs junctions. These nanostructured junctions showed promising current-voltage rectifying characteristics and gas sensing properties at room temperature.

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Self-Assembled 1-Octadecanethiol Membrane on Pd/ZnO for a Selective Room Temperature Flexible Hydrogen Sensor

Micromachines ◽

10.3390/mi13010026 ◽

2021 ◽

Vol 13 (1) ◽

pp. 26

Author(s):

Pawan Pathak ◽

Hyoung Jin Cho

Keyword(s):

Palladium Nanoparticles ◽

Room Temperature ◽

Low Cost ◽

Clean Energy ◽

Hydrogen Sensor ◽

Sensor Response ◽

Hydrogen Gas ◽

Zno Nanoparticle ◽

Energy Applications ◽

Self Assembled

A layer of self-assembled 1-octadecanethiol was used to fabricate a palladium (Pd)/zinc oxide (ZnO) nanoparticle-based flexible hydrogen sensor with enhanced response and high selectivity at room temperature. A palladium film was first deposited using DC sputtering technique and later annealed to form palladium nanoparticles. The formation of uniform, surfactant-free palladium nanoparticles contributed to improved sensor response towards hydrogen gas at room temperature. The obtained sensor response was higher than for previously reported room temperature Pd/ZnO sensors. Furthermore, the use of the polymer membrane suppressed the sensor’s response to methane, moisture, ethanol, and acetone, resulting in the selective detection of hydrogen in the presence of the common interfering species. This study shows a viable low-cost fabrication pathway for highly selective room temperature flexible hydrogen sensors for hydrogen-powered vehicles and other clean energy applications.

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Conducting polyaniline/SnO2 nanocomposite for room temperature hydrogen gas sensing

Materials Today Proceedings ◽

10.1016/j.matpr.2019.04.106 ◽

2019 ◽

Vol 15 ◽

pp. 447-453 ◽

Cited By ~ 1

Author(s):

Nayana D. Sonwane ◽

Monalisha D. Maity ◽

Subhash B. Kondawar

Keyword(s):

Room Temperature ◽

Gas Sensing ◽

Hydrogen Gas ◽

Conducting Polyaniline

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Hydrogen Gas Sensing Characterizations Based on Nanocrystalline SnO2 Thin Films Grown on SiO2/Si and Al2O3 Substrates

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.268.244 ◽

2017 ◽

Vol 268 ◽

pp. 244-248

Author(s):

Abu Hassan Haslan ◽

Imad Hussein Kadhim

Keyword(s):

Thin Films ◽

Room Temperature ◽

Gas Sensing ◽

Sol Gel ◽

Hydrogen Gas ◽

Rutile Structure ◽

Nanoparticle Distribution ◽

Si Substrates ◽

Coating Method ◽

Different Temperatures

High-quality nanocrystalline (NC) SnO2 thin films were grown on SiO2/Si and Al2O3 substrates using sol–gel spin coating method. The structural properties, surface morphologies and gas sensing properties of the NC SnO2 were investigated. XRD measurements showed a tetragonal rutile structure and the diffraction peaks for NC SnO2 thin films grown on Al2O3 substrates outperformed those of NC SnO2 films grown on SiO2/Si substrates. The surface morphology of the annealed SnO2 thin films at 500 °C appeared as polycrystalline with uniform nanoparticle distribution. Hydrogen (H2) gas sensing performance of the NC SnO2 was examined for H2 concentrations ranging from 150 ppm to 1000 ppm at different temperatures (room temperature, 75 and 125 °C) for over 50 min. The room temperature sensitivities for H2 gas sensors based on NC SnO2 thin films grown on Al2O3 and SiO2/Si substrates was 2570% and 600%, respectively upon exposure to 1000 ppm of H2 gas. While the sensitivity values at 125 °C increased to 9200% and 1950%, respectively.

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