Catalyst free vapor–solid deposition of morphologically different β-Ga2O3 nanostructure thin films for selective CO gas sensors at low temperature

2016 ◽  
Vol 8 (15) ◽  
pp. 3224-3235 ◽  
Author(s):  
K. Girija ◽  
S. Thirumalairajan ◽  
Valmor R. Mastelaro ◽  
D. Mangalaraj
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Gas Sensors ◽  
High Sensitivity ◽  
Catalyst Free ◽  
Unique Shape ◽  
Co Sensor ◽  
Co Gas ◽  
Solid Deposition

As prepared β-Ga2O3 thin films not only possess a unique shape but also influence the morphology dependent high sensitivity CO sensor at 100 °C.

Optical Gas Sensor Using Cobalt Oxide Thin Film Prepared by Pulsed Laser Ablation

2005 ◽  
Vol 900 ◽  
Author(s):  
Hyun-Jeong Nam ◽  
Takeshi Sasaki ◽  
Naoto Koshizaki
Keyword(s):  
Thin Films ◽  
Surface Area ◽  
Cobalt Oxide ◽  
Gas Sensors ◽  
Structural Changes ◽  
Pulsed Laser ◽  
High Sensitivity ◽  
Detection Sensitivity ◽  
Oxide Thin Film ◽  
Co Gas

ABSTRACTGas sensors based on optical absorption changes in thin films are of interest for detection of various gases such as CO, NO, H2. Optical gas sensors have several advantages over conventional electronic gas sensors, including the potential for higher sensitivity, reduced signal noise, and compatibility with combustible gases. Pulsed laser deposition (PLD) is an excellent method to prepare thin films with controllable thickness, composition and microstructures. Recently, our group reported that films of cobalt oxide prepared by PLD exhibit remarkably high sensitivity), showing an absorbance change in CO gas 70 times greater than those prepared by sputtering methods). Here we examine the effect of film microstructure and composition on CO gas sensing properties in order to identify the origin of the high sensitivity. Cobalt oxide films were prepared by PLD from a CoO target in an inert argon gas at various pressures. Films prepared near vacuum were smooth and continuous while the porosity and grain size increased linearly with pressure. In addition the pressure affected the composition and the thickness of the films. Data on the detection of CO gas suggests a direct relationship between sensitivity to CO gas and the effective surface area of films. We will discuss how the ablation plume can be used to tune the surface area for optimal sensitivity, and will demonstrate origin of the high detection sensitivity based on the structural changes with detecting gas.

Low-temperature CO gas sensors based on Au/SnO2 thick film

2007 ◽  
Vol 253 (6) ◽  
pp. 3057-3061 ◽  
Author(s):  
Shurong Wang ◽  
Yingqiang Zhao ◽  
Jing Huang ◽  
Yan Wang ◽  
Hongxia Ren ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thick Film ◽  
Gas Sensors ◽  
Co Gas

Chlorine gas sensors with high sensitivity using Mg-phthalocyanine thin films

2005 ◽  
Vol 244 (1-4) ◽  
pp. 563-567 ◽  
Author(s):  
Toshihiro Miyata ◽  
Tadatsugu Minami
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
High Sensitivity ◽  
Chlorine Gas

Characteristics of reactively sputtered Pt–SnO2 thin films for CO gas sensors

1996 ◽  
Vol 14 (4) ◽  
pp. 2215-2219 ◽  
Author(s):  
M. Di Giulio ◽  
G. Micocci ◽  
A. Serra ◽  
A. Tepore ◽  
R. Rella ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
Sno2 Thin Films ◽  
Co Gas

Sonochemical synthesis of Au nanowires in the III–I oxidation state bridged by 4,4′-dicyanamidobiphenyl and their application as selective CO gas sensors

2015 ◽  
Vol 44 (5) ◽  
pp. 2488-2495 ◽  
Author(s):  
Leila Tabrizi ◽  
Hossein Chiniforoshan
Keyword(s):  
Oxidation State ◽  
Gas Sensors ◽  
Room Temperature ◽  
High Sensitivity ◽  
Sonochemical Synthesis ◽  
Au Nanowires ◽  
Co Gas

Au nanowires of bpH2 were synthesized and used for gas sensors with high sensitivity to CO at room temperature.

CO Gas-Sensing at Low Temperature using CuO Thin Films

2019 ◽  
Author(s):  
Sumita Choudhary ◽  
Ajay Agarwal ◽  
Arnab Hazra ◽  
Subhashis Gangopadhyay
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Gas Sensing ◽  
Co Gas

Ozone gas sensors with high sensitivity using Zn2In2O5–MgIn2O4 multicomponent oxide thin films

2000 ◽  
Vol 126 (2-3) ◽  
pp. 219-224 ◽  
Author(s):  
Toshihiro Miyata ◽  
Tomohiro Hikosaka ◽  
Tadatsugu Minami
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
High Sensitivity ◽  
Oxide Thin Films ◽  
Multicomponent Oxide
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