scholarly journals Micro Light Plates for Photoactivated Micro-Power Gas Sensors

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 8
Author(s):  
Olga Casals ◽  
Nicolai Markiewicz ◽  
Cristian Fabrega ◽  
Isabel Gràcia ◽  
Carles Cané ◽  
...  
Keyword(s):  
Power Consumption ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Room Temperature ◽  
Quantitative Model ◽  
Design Rules ◽  
No2 Gas Sensor ◽  
Micro Power ◽  
Minimum Power Consumption ◽  
Mox Sensors

In this contribution we present a highly miniaturized device that integrates a photoactive material with a highly efficient LED light source. This so-called micro light plate configuration (µLP) allows for maximizing the irradiance impinging on the photoactive material, with a minimum power consumption, excellent uniformity and accurate control of the illumination. We demonstrate that, with the µLP approach, very efficient low power gas sensors can be built, and provide a detailed analysis of the rationales behind such improvement, as well as a quantitative model and a set of design rules to implement it in further integrated applications. As a demonstrator, we will describe a NO2 gas sensor operating in the part per billion range (ppb) with microwatt (µW) power consumption. These are the best figures reported to date in conductometric metal-oxides (MOX) sensors operated with light (instead of heat) at room temperature.

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,...

scholarly journals Ag Continuous Doped SnO2 Sensor Selective to Co2 in Presence of Ethanol at Room Temperature

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
M’hammed Benali Benadjemia ◽  
Mourad Lounis ◽  
Mohamed Miloudi ◽  
Nabil Beloufa
Keyword(s):  
Metal Oxides ◽  
Gas Sensor ◽  
Experimental Research ◽  
Gas Sensors ◽  
Laboratory Tests ◽  
Room Temperature ◽  
Operating Temperature ◽  
Experimental Methodology ◽  
Security Measures ◽  
Chemical Behavior

Abstract This paper contains experimental research to minimize the basic limits of the SnO2 semiconductor oxide gas sensor. The operating temperature is high. In addition, their selectivity diminishes with gasses having the same chemical behavior. An experimental methodology is presented to overcome the difficulties of these metal oxides. The efficiency of the gas sensors made of Ag continuously doped at room temperature is excellent. At the end of the testing processes and security measures supplied, laboratory tests and experiments will be conducted to guarantee the acceptability of the planned study.

scholarly journals Design rules for scalability in spin-orbit electronics

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mohammad Kazemi ◽  
Mark F. Bocko
Keyword(s):  
Heavy Metal ◽  
Power Consumption ◽  
Low Power ◽  
Topological Insulator ◽  
Room Temperature ◽  
Ferromagnetic Layer ◽  
Thermal Fluctuations ◽  
Low Power Consumption ◽  
Spin Orbit ◽  
Design Rules

Abstract Spin-orbit electronics (spin-orbitronics) has been widely discussed for enabling nonvolatile devices that store and process information with low power consumption. The potential of spin-orbitronics for memory and logic applications has been demonstrated by perpendicular anisotropy magnetic devices comprised of heavy-metal/ferromagnet or topological-insulator/ferromagnet bilayers, where the heavy metal or topological insulator provides an efficient source of spin current for manipulating information encoded in the bistable magnetization state of the ferromagnet. However, to reliably switch at room temperature, spin-orbit devices should be large to reduce thermal fluctuations, thereby compromising scalability, which in turn drastically increases power dissipation and degrades performance. Here, we show that the scalability is not a fundamental limitation in spin-orbitronics, and by investigating the interactions between the geometry of the ferromagnetic layer and components of the spin-orbit torque, we derive design rules that lead to deeply scalable spin-orbit devices. Furthermore, employing experimentally verified models, we propose deeply scaled spin-orbit devices exhibiting high-speed deterministic switching at room temperature. The proposed design principles are essential for design and implementation of very-large-scale-integration (VLSI) systems that provide high performance operation with low power consumption.

2D/2D/2D Ti3C2Tx@TiO2@MoS2 Heterostructure as Ultrafast and High-sensitivity NO2 Gas Sensor at Room-temperature

2022 ◽  
Author(s):  
Zhuo Liu ◽  
He Lv ◽  
Ying Xie ◽  
Jue Wang ◽  
Jiahui Fan ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
2D Materials ◽  
High Sensitivity ◽  
Two Dimensional ◽  
No2 Gas Sensor ◽  
2D Structure ◽  
Sensing Application

The very diverse two-dimensional (2D) materials have bloomed in NO2 gas sensing application that provide new opportunities and challenges in function oriented gas sensors. In this work, a 2D/2D/2D structure...

scholarly journals Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

2019 ◽  
Vol 6 (3) ◽  
pp. 470-506 ◽  
Author(s):  
Zhijie Li ◽  
Hao Li ◽  
Zhonglin Wu ◽  
Mingkui Wang ◽  
Jingting Luo ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Room Temperature ◽  
Comprehensive Review ◽  
Sensor Applications ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Semiconducting Metal Oxides ◽  
Semiconducting Metal Oxide

A comprehensive review on designs and mechanisms of semiconducting metal oxides with various nanostructures for room-temperature gas sensor applications.

scholarly journals A Review on Functionalized Graphene Sensors for Detection of Ammonia

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1443
Author(s):  
Xiaohui Tang ◽  
Marc Debliquy ◽  
Driss Lahem ◽  
Yiyi Yan ◽  
Jean-Pierre Raskin
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Mass Production ◽  
Metallic Nanoparticles ◽  
Room Temperature ◽  
Organic Molecules ◽  
High Sensitivity ◽  
Functionalized Graphene ◽  
Fast Detection ◽  
Sensor Mass

Since the first graphene gas sensor has been reported, functionalized graphene gas sensors have already attracted a lot of research interest due to their potential for high sensitivity, great selectivity, and fast detection of various gases. In this paper, we summarize the recent development and progression of functionalized graphene sensors for ammonia (NH3) detection at room temperature. We review graphene gas sensors functionalized by different materials, including metallic nanoparticles, metal oxides, organic molecules, and conducting polymers. The various sensing mechanism of functionalized graphene gas sensors are explained and compared. Meanwhile, some existing challenges that may hinder the sensor mass production are discussed and several related solutions are proposed. Possible opportunities and perspective applications of the graphene NH3 sensors are also presented.

Room temperature ethanol sensing properties of ZnO nanorods prepared using an electrospinning technique

2017 ◽  
Vol 5 (41) ◽  
pp. 10869-10880 ◽  
Author(s):  
Prabakaran Shankar ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Power Consumption ◽  
Real Time ◽  
Gas Sensors ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Real Time Monitoring ◽  
Electrospinning Technique ◽  
Sensing Properties ◽  
Major Attention ◽  
Ethanol Sensing

In recent years, the design of room temperature gas sensors has received major attention from researchers considering their deployment for real-time monitoring and power consumption.

The Influence of Surface Doping on Adsorption Ability of Nanopowder Metal Oxides for Gas Sensors

2017 ◽  
Vol 9 (5) ◽  
pp. 05008-1-05008-5 ◽  
Author(s):  
Ya. V. Bobitski ◽  
◽  
R. V. Bovhyra ◽  
D. I. Popovych ◽  
S. S. Savka ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Adsorption Ability ◽  
Surface Doping

Metal-oxide based ammonia gas sensors: A review

2020 ◽  
Vol 10 ◽  
Author(s):  
Priya Gupta ◽  
Savita Maurya ◽  
Narendra Kumar Pandey ◽  
Vernica Verma
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Review Paper ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Ammonia Gas Sensors

: This review paper encompasses a study of metal-oxide and their composite based gas sensors used for the detection of ammonia (NH3) gas. Metal-oxide has come into view as an encouraging choice in the gas sensor industry. This review paper focuses on the ammonia sensing principle of the metal oxides. It also includes various approaches adopted for increasing the gas sensitivity of metal-oxide sensors. Increasing the sensitivity of the ammonia gas sensor includes size effects and doping by metal or other metal oxides which will change the microstructure and morphology of the metal oxides. Different parameters that affect the performances like sensitivity, stability, and selectivity of gas sensors are discussed in this paper. Performances of the most operated metal oxides with strengths and limitations in ammonia gas sensing application are reviewed. The challenges for the development of high sensitive and selective ammonia gas sensor are also discussed.

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