نتایج جستجو برای: gas sensing performance

تعداد نتایج: 1381147  

Journal: :Nanoscale 2011
Zhipeng Li Quanqin Zhao Weiliu Fan Jinhua Zhan

Porous SnO(2) nanospheres with high surface areas have been synthesized through a solvothermal method in the absence of any templates. The structure and morphology of the resultant products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption technique....

Journal: :Nanoscale 2013
Alexey Lipatov Alexey Varezhnikov Peter Wilson Victor Sysoev Andrei Kolmakov Alexander Sinitskii

The electrical properties of reduced graphene oxide (rGO) have been previously shown to be very sensitive to surface adsorbates, thus making rGO a very promising platform for highly sensitive gas sensors. However, poor selectivity of rGO-based gas sensors remains a major problem for their practical use. In this paper, we address the selectivity problem by employing an array of rGO-based integra...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

zno and zno: mn nanocrystals were synthesized via reverse micelle method. the structural properties of nanocrystals were investigated by xrd. the xrd results indicated that the synthesized nanocrystals had a pure wurtzite (hexagonal phase) structure. resistive gas sensors were fabricated by providing ohmic contacts on the tablet obtained from compressed nanocrystals powder and the installation ...

2013
Mohammad R. Alenezi Abdullah S. Alshammari K. D. G. I. Jayawardena Michail J Beliatis Simon J. Henley S. R. P. Silva

ZnO nanostructures with different morphologies (nanowires, nanodisks, and nanostars) were synthesized hydrothermally. Gas sensing properties of the as-grown nanostructures were investigated under thermal and UV activation. The performance of the ZnO nanodisk gas sensor was found to be superior to that of other nanostructures (Sg ∼ 3700% to 300 ppm ethanol and response time and recovery time of ...

Journal: :CoRR 2017
Varun Kumar Ojha Paramartha Dutta Atal Chaudhuri Hiranmay Saha

Human fatalities are reported due to the excessive proportional presence of hazardous gas components in manhole, such as Hydrogen Sulfide, Ammonia, Methane, Carbon Dioxide, Nitrogen Oxide, Carbon Monoxide, etc. Hence, predetermination of these gases is imperative. A neural network (NN) based intelligent sensory system is proposed for the avoidance of such fatalities. Backpropagation (BP) was ap...

2017
Elena Dilonardo Michele Penza Marco Alvisi Gennaro Cassano Cinzia Di Franco Francesco Palmisano Luisa Torsi Nicola Cioffi

Pristine and electrochemically Pd-modified ZnO nanorods (ZnO NRs) were proposed as active sensing layers in chemiresistive gas sensors for hydrocarbon (HC) gas detection (e.g., CH4, C3H8, C4H10). The presence of Pd nanoparticles (NPs) on the surface of ZnO NRs, obtained after the thermal treatment at 550 °C, was revealed by morphological and surface chemical analyses, using scanning electron mi...

2011
Yusuf Amrulloh Udantha Abeyratne Chandima Ekanayake

Oil testing has found widespread use in assessing the quality of the insulation system of a transformer. Techniques such as Dissolved Gas Analysis (DGA) have been proven to be reliable in this task, but are expensive, laborious and time consuming. It is also not available for field use. This paper proposes the combined use of gas and optical sensing technology for the testing of transformer oil...

2017
Vardan Galstyan

Gas sensors play an important role in our life, providing control and security of technical processes, environment, transportation and healthcare. Consequently, the development of high performance gas sensor devices is the subject of intense research. TiO₂, with its excellent physical and chemical properties, is a very attractive material for the fabrication of chemical sensors. Meanwhile, the ...

2017
Zhihong Feng Yuan Xie Enxiu Wu Yuanyuan Yu Shijun Zheng Rui Zhang Xuejiao Chen Chonglin Sun Hao Zhang Wei Pang Jing Liu

Two-dimensional (2D) transition metal dichalcogenides (TMDCs) semiconducting materials have recently attracted wide attention and been regarded as promising building blocks for chemical sensors due to their high surface-to-volume ratio. However, their low response hinders the realization of high-performance 2D TMDCs chemical sensors. Here, we demonstrate the improvement of sensing performance o...

Journal: :CoRR 2018
Riccardo Polvara Marco Trabattoni Tomasz Kucner Erik Schaffernicht Francesco Amigoni Achim J. Lilienthal

The problem of gas detection is relevant to many real-world applications, such as leak detection in industrial settings and landfill monitoring. Using mobile robots for gas detection has several advantages and can reduce danger for humans. In our work, we address the problem of planning a path for a mobile robotic platform equipped with a remote gas sensor, which minimizes the time to detect al...

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