scholarly journals A Low-Cost Intelligent Gas Sensing Device for Military Applications

2008 ◽  
Author(s):  
Robert F. Kennedy ◽  
Saeid Nahavandi
Keyword(s):  
Gas Sensing ◽  
Low Cost ◽  
Military Applications ◽  
Gas Sensing Device

A low-cost microplasma generation unit allowing for the on-site processing of ZnO-based gas sensors

The Analyst ◽  
2019 ◽  
Vol 144 (22) ◽  
pp. 6653-6659
Author(s):  
Fei-Hung Huang ◽  
Sz-Yun Lin ◽  
Cheng-Che Hsu
Keyword(s):  
Zinc Oxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Low Cost ◽  
Gas Sensing Device ◽  
Generation Unit

In this study, a low-cost gas-sensing device that integrates a zinc-oxide (ZnO)-based gas sensor with a microplasma generation unit is presented.

scholarly journals Mesoporous titanium niobium nitrides supported Pt nanoparticles for highly selective and sensitive detection of formaldehyde

2021 ◽  
Author(s):  
Chaozhu Huang ◽  
Samira Adimi ◽  
Dongliang Liu ◽  
Haichuan Guo ◽  
Tiju Thomas ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Proton Exchange ◽  
The Poor ◽  
Supported Platinum ◽  
Commercial Carbon ◽  
Niobium Nitrides ◽  
Exchange Membrane ◽  
Gas Sensing Device

Proton exchange membrane fuel cell gas sensor is a promising and novel gas sensing device. However, the poor sensitivity and strong cross sensitivity of commercial carbon-supported-platinum (Pt/C) remain obstacles to...

scholarly journals A Single-Walled Carbon Nanotube Network Gas Sensing Device

Sensors ◽  
2011 ◽  
Vol 11 (8) ◽  
pp. 7763-7772 ◽  
Author(s):  
Li-Chun Wang ◽  
Kea-Tiong Tang ◽  
I-Ju Teng ◽  
Cheng-Tzu Kuo ◽  
Cheng-Long Ho ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensing ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Network ◽  
Gas Sensing Device

scholarly journals Yttrium Doped TiO2 Thin Film for Gas Sensing Application Prepared by Spin Coating Method

2020 ◽  
Author(s):  
M Abdul Kaiyum ◽  
Naim Ahmed ◽  
Arif Alam ◽  
M Shamimur Rahman
Keyword(s):  
Thin Film ◽  
Photoelectron Spectroscopy ◽  
Gas Sensing ◽  
Low Cost ◽  
Pure Titanium ◽  
X Ray ◽  
Sensing Applications ◽  
Coating Method ◽  
Set Up ◽  
Spin Coater

Abstract Yttrium (Y) doped and pure Titanium Di-oxide (TiO2) thin films were prepared by using spin coater. The coater was set up in laboratory with low cost investment. The films were calcined at 450 °C for 1 hour. For characterization, Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Atomic Force Microscopy (AFM) were carried out. LCR Bridge - GW Instek LCR-821 was used for gas sensing applications. XPS showed that the change of electronic structure due to Y doping. SEM and AFM analysis were carried out to determine the surface morphology of the films. Yttrium (Y) decreased the crystallite size of the films and increased the surface roughness and porosity value, which was very good for many sensing applications. Gas sensing property of the deposited films were improved by the incorporation of yttrium impurities and the sensing property improved almost two times than pure TiO2 thin film. Different researches have been done their research related to this topic but no one researchers provide a precise explanation of their results, authors of this research have tried to do that. Moreover the films were prepared by a simple spin coater to reduce the production cost also.

scholarly journals Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Angga Hermawan ◽  
Ni Luh Wulan Septiani ◽  
Ardiansyah Taufik ◽  
Brian Yuliarto ◽  
Suyatman ◽  
...  
Keyword(s):  
High Performance ◽  
Gas Sensing ◽  
Low Cost ◽  
Molybdenum Oxides ◽  
Exhaled Breath ◽  
Sensor Applications ◽  
Theoretical Investigations ◽  
Gas Sensing Properties ◽  
Future Challenges ◽  
Made In

AbstractMolybdenum-based materials have been intensively investigated for high-performance gas sensor applications. Particularly, molybdenum oxides and dichalcogenides nanostructures have been widely examined due to their tunable structural and physicochemical properties that meet sensor requirements. These materials have good durability, are naturally abundant, low cost, and have facile preparation, allowing scalable fabrication to fulfill the growing demand of susceptible sensor devices. Significant advances have been made in recent decades to design and fabricate various molybdenum oxides- and dichalcogenides-based sensing materials, though it is still challenging to achieve high performances. Therefore, many experimental and theoretical investigations have been devoted to exploring suitable approaches which can significantly enhance their gas sensing properties. This review comprehensively examines recent advanced strategies to improve the nanostructured molybdenum-based material performance for detecting harmful pollutants, dangerous gases, or even exhaled breath monitoring. The summary and future challenges to advance their gas sensing performances will also be presented.

Electrohydrodynamic printing for scalable MoS2flake coating: application to gas sensing device

2016 ◽  
Vol 27 (43) ◽  
pp. 435501 ◽  
Author(s):  
Sooman Lim ◽  
Byungjin Cho ◽  
Jaehyun Bae ◽  
Ah Ra Kim ◽  
Kyu Hwan Lee ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Coating Application ◽  
Electrohydrodynamic Printing ◽  
Gas Sensing Device

scholarly journals A Review of Carbon Nanotubes-Based Gas Sensors

2009 ◽  
Vol 2009 ◽  
pp. 1-24 ◽  
Author(s):  
Yun Wang ◽  
John T. W. Yeow
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Low Cost ◽  
High Surface ◽  
Hollow Structure ◽  
Volume Ratio ◽  
Fast Response ◽  
Sensing Technology ◽  
Structure Of Nanomaterials

Gas sensors have attracted intensive research interest due to the demand of sensitive, fast response, and stable sensors for industry, environmental monitoring, biomedicine, and so forth. The development of nanotechnology has created huge potential to build highly sensitive, low cost, portable sensors with low power consumption. The extremely high surface-to-volume ratio and hollow structure of nanomaterials is ideal for the adsorption of gas molecules. Particularly, the advent of carbon nanotubes (CNTs) has fuelled the inventions of gas sensors that exploit CNTs' unique geometry, morphology, and material properties. Upon exposure to certain gases, the changes in CNTs' properties can be detected by various methods. Therefore, CNTs-based gas sensors and their mechanisms have been widely studied recently. In this paper, a broad but yet in-depth survey of current CNTs-based gas sensing technology is presented. Both experimental works and theoretical simulations are reviewed. The design, fabrication, and the sensing mechanisms of the CNTs-based gas sensors are discussed. The challenges and perspectives of the research are also addressed in this review.

scholarly journals Silicon-On-Nothing IR-Emitter for Gas Sensing Applications

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1080
Author(s):  
Vladislav Komenko ◽  
Andrey Kravchenko ◽  
Wolf-Joachim Fischer
Keyword(s):  
Thermal Stability ◽  
Material Properties ◽  
Polycrystalline Silicon ◽  
Gas Sensing ◽  
Low Cost ◽  
Extreme Temperatures ◽  
Sensing Applications ◽  
Material Choice ◽  
Target Performance ◽  
Compact Design

Within the current work, we present a miniaturized IR-Emitter based on Silicon-On-Nothing (SON) technology capable of producing 10 ms pulses. Transition to monocrystalline silicon, as the material choice for the filament, is governed by improved reliability and greater thermal stability as opposed to polycrystalline silicon alternative, commonly used in such class of devices. Compact design, low-cost processing and exceptional filament material properties make the presented device a favorite solution for integrated gas sensing applications. Numerical modeling and measurements of the IR-Emitter are performed to investigate the heating dynamics and assess the structure’s behavior at extreme temperatures as well as confirm the target performance. Additionally, a part of the work is dedicated to cover the insight of used fabrication process and the discussion of further improvements.

scholarly journals Impact of Fluid Flow on CMOS-MEMS Resonators Oriented to Gas Sensing

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4663
Author(s):  
Rafel Perello-Roig ◽  
Jaume Verd ◽  
Sebastià Bota ◽  
Jaume Segura
Keyword(s):  
Fluid Flow ◽  
Gas Sensing ◽  
Low Cost ◽  
Cmos Technology ◽  
Monolithically Integrated ◽  
Impact Reduction ◽  
Mems Resonators ◽  
Cmos Mems ◽  
Outstanding Result ◽  
The Impact

Based on experimental data, this paper thoroughly investigates the impact of a gas fluid flow on the behavior of a MEMS resonator specifically oriented to gas sensing. It is demonstrated that the gas stream action itself modifies the device resonance frequency in a way that depends on the resonator clamp shape with a corresponding non-negligible impact on the gravimetric sensor resolution. Results indicate that such an effect must be accounted when designing MEMS resonators with potential applications in the detection of volatile organic compounds (VOCs). In addition, the impact of thermal perturbations was also investigated. Two types of four-anchored CMOS-MEMS plate resonators were designed and fabricated: one with straight anchors, while the other was sustained through folded flexure clamps. The mechanical structures were monolithically integrated together with an embedded readout amplifier to operate as a self-sustained fully integrated oscillator on a commercial CMOS technology, featuring low-cost batch production and easy integration. The folded flexure anchor resonator provided a flow impact reduction of 5× compared to the straight anchor resonator, while the temperature sensitivity was enhanced to −115 ppm/°C, an outstanding result compared to the −2403 ppm/°C measured for the straight anchored structure.

Conductimetric Detection of Protein and Cancer Cells with Oxide Nanosensors

2007 ◽  
Vol 1010 ◽  
Author(s):  
Janagama Goud ◽  
P. Markondeya Raj ◽  
Jin Liu ◽  
Mahadevan Iyer ◽  
Z. L. Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Cancer Cells ◽  
Gas Sensing ◽  
Low Cost ◽  
Electrochemical Techniques ◽  
Oxide Thin Film ◽  
Thin Film Sensors ◽  
Biochemical Sensing ◽  
Rabbit Igg ◽  
Thin Film Oxides

AbstractSemiconducting oxides are widely known and commercially applied for their gas sensing properties. However, biochemical sensing has mostly depended on optical and electrochemical techniques that are more cumbersome. This work investigates the biosensing characteristics of ZnO nanobelts and ZnO thin films. Zinc oxide thin film sensors showed changes in conductivity after protein functionalization with rabbit IgG and hybridization with anti-rabbit IgG. Conductivity changes were also measured after coating the oxides with MCF-7 cancer cells and its antibodies. In another set of experiments, ZnO nanobelts showed systematic conductivity changes with rabbit IgG protein hybridization. The experimental results in this paper indicate that the conductimetric properties of nano and thin film oxides can be sensitized to protein and cancer cell hybridization reactions. This technique can also be applied to certain other pathogen proteins or toxic proteins from the environment leading to low-cost miniaturized wireless biosensors.

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