Polymer coated thin film plate acoustic resonators (FPAR) for gas sensing applications

2011 ◽  
Author(s):  
L. Arapan ◽  
I. Katardjiev ◽  
V. Yantchev ◽  
G. Alexieva ◽  
V. Strashilov ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Sensing ◽  
Acoustic Resonators ◽  
Sensing Applications

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 Dielectric Properties of SnO2 Thin Film Using SPR Technique for Gas Sensing Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Ayushi Paliwal ◽  
Anjali Sharma ◽  
Monika Tomar ◽  
Vinay Gupta
Keyword(s):  
Thin Film ◽  
Dielectric Constant ◽  
Gas Sensing ◽  
Rf Sputtering ◽  
Fast Response ◽  
Attenuated Total Reflection ◽  
Sno2 Thin Film ◽  
Bilayer Film ◽  
Significant Shift ◽  
Sensing Applications

Focus has been made on the determination of dielectric constant of thin dielectric layer (SnO2 thin film) using surface plasmon resonance (SPR) technique and exploiting it for the detection of NH3 gas. SnO2 thin film has been deposited by rf-sputtering technique on gold coated glass prism (BK-7) and its SPR response was measured in the Kretschmann configuration of attenuated total reflection using a p-polarised light beam at 633 nm wavelength. The SPR response of bilayer film was fitted with Fresnel’s equations in order to calculate the dielectric constant of SnO2 thin film. The air/SnO2/Au/prim system has been utilized for detecting varying concentration (500 ppm to 2000 ppm) of NH3 gas at room temperature using SPR technique. SPR curve shows significant shift in resonance angle from 44.8° to 56.7° on exposure of fixed concentration of NH3 gas (500 ppm to 2000 ppm) with very fast response and recovery speeds.

Investigations of reversible optical transmission in gasochromic (Ti–V–Ta)Ox thin film for gas sensing applications

2014 ◽  
Vol 201 ◽  
pp. 420-425 ◽  
Author(s):  
Jaroslaw Domaradzki ◽  
Danuta Kaczmarek ◽  
Damian Wojcieszak ◽  
Michał Mazur
Keyword(s):  
Thin Film ◽  
Optical Transmission ◽  
Gas Sensing ◽  
Sensing Applications

Thermally Evaporated Tin Oxide Thin Film for Gas Sensing Applications

2017 ◽  
Vol 9 (2) ◽  
pp. 02019-1-02019-4 ◽  
Author(s):  
Sumanta Kumar Tripathy ◽  
◽  
T. N. V. Prabhakara Rao ◽  
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Oxide Thin Film ◽  
Sensing Applications

scholarly journals The Use of Copper Oxide Thin Films in Gas-Sensing Applications

Coatings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 425 ◽  
Author(s):  
Artur Rydosz
Keyword(s):  
Thin Film ◽  
Copper Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Oxide Thin Film ◽  
Exhaled Breath ◽  
Long Term Stability ◽  
Advantages And Disadvantages ◽  
Sensing Applications ◽  
Commercial Applications

In this work, the latest achievements in the field of copper oxide thin film gas sensors are presented and discussed. Several methods and deposition techniques are shown with their advantages and disadvantages for commercial applications. Recently, CuO thin film gas sensors have been studied to detect various compounds, such as: nitrogen oxides, carbon oxides, hydrogen sulfide, ammonia, as well as several volatile organic compounds in many different applications, e.g., agriculture. The CuO thin film gas sensors exhibited high 3-S parameters (sensitivity, selectivity, and stability). Furthermore, the possibility to function at room temperature with long-term stability was proven as well, which makes this material very attractive in gas-sensing applications, including exhaled breath analysis.

Gas-Sensing Property Evaluation of Reactively Sputtered Chromium Oxide Thin Films

2008 ◽  
Vol 55-57 ◽  
pp. 285-288 ◽  
Author(s):  
C. Oros ◽  
Anurat Wisitsoraat ◽  
Pichet Limsuwan ◽  
M. Horpathum ◽  
V. Patthanasettakul ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Metal Oxide ◽  
Chromium Oxide ◽  
Flow Rate ◽  
Gas Sensing ◽  
Oxygen Flow Rate ◽  
Oxide Thin Film ◽  
Oxide Thin Films ◽  
Sensing Applications

Metal oxide thin film materials, including SnO2, TiO2, WO3, MoO3, ZnO, have been widely studied for gas sensing applications. However, new gas-sensing materials with distinct and diverse characteristics for new sensing applications such as electronic nose are still being explored. Presently, gas sensing properties of other metal oxides have not yet been extensively explored. Chromium oxide is an interesting metal oxide for gas sensor because of its temperature stability and moderate electrical conductivity. Nevertheless, there have been very few studies on gas sensing behaviors of this material. In this work, chromium oxide thin films were systematically studied by reactive sputtering with varying sputtering parameter including oxygen flow rate. Structural characterization by means of scanning electron microscopy and X-ray diffraction reveals that the films have sub-micometer grain-size with Rhombohedral phase of Cr2O3. Gas-sensing performances of sputtered chromium oxide thin film have been characterized toward ethanol and acetylene sensing. It was found that chromium oxide thin films exhibit p-type conductivity with increased resistance when exposed to ethanol and acetylene, which are reducing gases. In addition, sensitivity to both acetylene and ethanol tend to improve as oxygen flow rate increases. Furthermore, the chromium oxide thin films exhibit high sensitivity at moderate temperature of 250-300 °C with minimum operating temperature of 200 °C.

Fabrication and characterization of calix[4]arene Langmuir–Blodgett thin film for gas sensing applications

2017 ◽  
Vol 89 (1-2) ◽  
pp. 77-84 ◽  
Author(s):  
Yaser Acikbas ◽  
Selahattin Bozkurt ◽  
Erkan Halay ◽  
Rifat Capan ◽  
Mehmet Levent Guloglu ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Sensing ◽  
Langmuir Blodgett ◽  
Sensing Applications ◽  
Fabrication And Characterization

ZnO thin film nanostructures for hydrogen gas sensing applications

2013 ◽  
Vol 39 ◽  
pp. S447-S450 ◽  
Author(s):  
Husam S. Al-Salman ◽  
M.J. Abdullah ◽  
Naif Al-Hardan
Keyword(s):  
Thin Film ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Zno Thin Film ◽  
Sensing Applications ◽  
Thin Film Nanostructures
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