Improvement of Gas Sensing of Uniform Ag 3 PO 4 Nanoparticles to NH 3 under the Assistant of LED Lamp with Low Power Consumption at Room Temperature

2021 ◽  
Vol 6 (32) ◽  
pp. 8338-8344
Author(s):  
Xingyan Shao ◽  
Shuo Wang ◽  
Leqi Hu ◽  
Tingting Liu ◽  
Xiaomei Wang ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Room Temperature ◽  
Gas Sensing ◽  
Low Power Consumption

An ultra-sensitive gas sensor based on two-dimensional manganese porphyrin monolayer

2021 ◽  
Author(s):  
Ze-Wen Hao ◽  
Mi-Mi Dong ◽  
Rui Qin Zhang ◽  
Chuankui Wang ◽  
Xiaoxiao Fu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Room Temperature ◽  
Gas Sensing ◽  
Environmental Safety ◽  
Low Power Consumption ◽  
Two Dimensional ◽  
Manganese Porphyrin ◽  
Highly Sensitive ◽  
Important Solution

The development of highly sensitive, low-power consumption, stable and recyclable gas sensing devices at room temperature has become an important solution for the environmental safety detection. Utilizing two-dimensional metalloporphyrin monolayer...

scholarly journals Compact CH4 sensor system based on a continuous-wave, low power consumption, room temperature interband cascade laser

2016 ◽  
Vol 108 (1) ◽  
pp. 011106 ◽  
Author(s):  
Lei Dong ◽  
Chunguang Li ◽  
Nancy P. Sanchez ◽  
Aleksander K. Gluszek ◽  
Robert J. Griffin ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Room Temperature ◽  
Continuous Wave ◽  
Sensor System ◽  
Low Power Consumption ◽  
Interband Cascade Laser

Mid-infrared gas sensing using uncooled quantum cascade laser with low power consumption

2019 ◽  
Author(s):  
Makoto Murata ◽  
Hiroyuki Yoshinaga ◽  
Takashi Kato ◽  
Hiroki Mori ◽  
Yukihiro Tsuji ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Quantum Cascade Laser ◽  
Gas Sensing ◽  
Low Power Consumption ◽  
Mid Infrared ◽  
Quantum Cascade

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.

Ion Gel-Coated Graphene Transistor for Ethanol Gas Sensing

2021 ◽  
Vol 105 ◽  
pp. 3-7
Author(s):  
De Sheng Liu ◽  
Jiang Wu ◽  
Zhi Ming Wang
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Industrial Production ◽  
Gas Sensing ◽  
Drunk Driving ◽  
Fast Response ◽  
Low Power Consumption ◽  
Operating Voltage ◽  
Ethanol Sensor ◽  
Ion Gel

Ethanol sensor has been widely used in our daily life and industrial production, such as drunk driving test, food fermentation monitoring, and industrial gas leakage monitoring. With the advent of the Internet of Things (IoT) era, ethanol sensors will develop towards miniaturization and low-power consumption in the near future. However, traditional ethanol sensors with large volumes and high-power consumption are difficult to meet these requirements. Therefore, it is urgent to study ethanol gas sensors based on new materials and new structures. Here, we demonstrated a flexible ethanol sensor based on an ion gel-coated graphene field-effect transistor (IGFET). The device has a small graphene channel size with a width of 300 μm and a length of 200 μm. The device showed a low operating voltage of less than |±1| V. When the device was put into an ethanol gas condition, the Dirac point voltage of the IGFET showed a negative shift, which means an n-type doping effect to the graphene channel. Furthermore, the sensor showed a normalized current change of-11% against an ethanol gas concentration of 78.51 g/L at a constant drain-source voltage of 0.1 V. In addition, the device exhibited a fast response time of ~10 s and a recovery time of ~18 s. Moreover, the detectable range of the device was found to as wide as 19.76-785.1 g/L. Based on the above results, the flexible IGFET-based ethanol sensor with small size and low-power consumption has great potential to be used in the industrial production of the IoT era.

Electro Thermal Effects of Geometrically Modified MEMS-Based Micro Heater for Gas Sensing Applications

2019 ◽  
Vol 17 (9) ◽  
pp. 725-732
Author(s):  
Vishal Balasubramanian ◽  
V. S. Selvakumar ◽  
L. Sujatha ◽  
M. Revathi ◽  
C. V. Gayathri
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Gas Sensing ◽  
Comsol Multiphysics ◽  
Low Power Consumption ◽  
Temperature Uniformity ◽  
Gas Sensitivity ◽  
Average Temperature ◽  
Sensing Applications ◽  
Sensitivity And Selectivity

Micro heaters play a major role in gas sensing applications owing to their accuracy, selectivity and low power consumption. The proposed micro heater employs a window type polysilicon micro-hotplate structure, which is a square cell of side 500 μm, designed using COMSOL Multiphysics. It is highly imperative that an evenly distributed temperature is necessary over the broad area of the heater in order to improve its gas sensitivity and selectivity. In this paper, we have explained the design and analysis of a novel window-type micro heater made of polysilicon. The main aim of the work is to achieve temperature uniformity and low power consumption. By optimizing the geometry of the micro heater, we can obtain both temperature uniformity and low power consumption. This geometrical optimization also improves the sensitivity and response time of the sensor. To support them, we have carried out simulations using COMSOL Multiphysics. The proposed structure has obtained a uniform temperature of 1134.1 K and an average temperature of 1130.39 K. Such high and uniform temperatures finds applications in gas sensors. This work also analyzes the proper choice and placement of electrodes across the geometry of the heater.

scholarly journals Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3843
Author(s):  
Manu Muhiyudin ◽  
David Hutson ◽  
Desmond Gibson ◽  
Ewan Waddell ◽  
Shigeng Song ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Optical Filters ◽  
Low Power Consumption ◽  
Practical Implementation ◽  
Pass Band ◽  
Concept Design ◽  
Infrared Source

Concept, design and practical implementation of a miniaturized spectrophotometer, utilized as a mid-infrared-based multi gas sensor is described. The sensor covers an infrared absorption wavelength range of 2.9 to 4.8 um, providing detection capabilities for carbon dioxide, carbon monoxide, nitrous oxide, sulphur dioxide, ammonia and methane. A lead selenide photo-detector array and customized MEMS-based micro-hotplate are used as the detector and broadband infrared source, respectively. The spectrophotometer optics are based on an injection moulded Schwarzschild configuration incorporating optical pass band filters for the spectral discrimination. This work explores the effects of using both fixed-line pass band and linear variable optical filters. We report the effectiveness of this low-power-consumption miniaturized spectrophotometer as a stand-alone single and multi-gas sensor, usage of a distinct reference channel during gas measurements, development of ideal optical filters and spectral control of the source and detector. Results also demonstrate the use of short-time pulsed inputs as an effective and efficient way of operating the sensor in a low-power-consumption mode. We describe performance of the spectrometer as a multi-gas sensor, optimizing individual component performances, power consumption, temperature sensitivity and gas properties using modelling and customized experimental procedures.

Active Nanostructures at Interfaces for Photocatalytic Reactors and Low-power Consumption Sensors

2010 ◽  
Vol 1257 ◽  
Author(s):  
James L Gole ◽  
Serdar Ozdemir ◽  
Sharka M Prokes ◽  
David M Dixon
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Metal Ions ◽  
Metal Ion ◽  
Room Temperature ◽  
Transition Metal Ions ◽  
Low Power Consumption ◽  
Temperature Phase ◽  
Photocatalytic Reactors ◽  
Nanostructured Metal Oxides

AbstractActive nanostructures which provide unique transformations are being introduced to phase matched porous silicon (PS) nano/micropores to form a platform for low power consumption highly selective sensors and microreactors. TiO2-xNx photocatalysts have been formed in seconds at room temperature at the nanoscale via the direct nitration of anatase TiO2 nanocolloids. Tunability throughout the visible depends upon the degree of agglomeration and the ability to seed these nanoparticles with metal ions. Co metal ion seeding leads to the efficient room temperature phase transformation, of anatase to rutile TiO2, where normally much higher temperatures are required. Seeding of a properly nitridated TiO2 nanocolloid with transition metal ions (Co, Ni) allows for the enhancement of the infrared spectra of the TiO2-xNx nitridated titania surface in excess of 10-fold, providing a means to analyze for minor contaminants and intermediates. Evidence for nitrogen fixation is found in Fe treated systems. The TiO2-xNx systems act as visible light absorbing photocatalyts. These photocatalysts and additional nanostructured metal oxides can be placed on the surface of PS-based sensor and microreactor configurations to greatly improve the interface response.

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