Novel Nano In2O3—WO3 Composite Films for Ultra Trace Level (ppb) Detection of NO Gas at Room Temperature

2012 ◽  
Vol 17 (1) ◽  
pp. 76-81 ◽  
Author(s):  
I-Chun Yao ◽  
Xiang-Hong Zheng ◽  
Ren-Jang Wu ◽  
Gobalakrishnan Suyambrakasam ◽  
Murthy Chavali
The Analyst ◽  
2021 ◽  
Author(s):  
Jialin Yang ◽  
Ding Wang ◽  
Ming Li ◽  
Haitao Yu ◽  
Pengcheng Xu ◽  
...  

The trace-level detection to harmful NO2 gas at room-temperature is very important for environmental protection and public health. This paper reports the resonant-gravimetric detection of ppb-level NO2 at room-temperature using...


2009 ◽  
Vol 517 (19) ◽  
pp. 5621-5624 ◽  
Author(s):  
Eilidh Morrison ◽  
David Gutiérrez-Tauste ◽  
Concepción Domingo ◽  
Elena Vigil ◽  
José A. Ayllón

2004 ◽  
Vol 95 (10) ◽  
pp. 5661-5665 ◽  
Author(s):  
Hui Liu ◽  
E. Y. Jiang ◽  
H. L. Bai ◽  
R. K. Zheng

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3077
Author(s):  
Rima D. Alharthy ◽  
Ahmed Saleh

In this study, we developed a new chemi-resistive, flexible and selective ammonia (NH3) gas sensor. The sensor was prepared by depositing thin film of polyaniline-cobalt ferrite (PAni-CoFe2O4) nanocomposite on flexible polyethylene terephthalate (PET) through an in situ chemical oxidative polymerization method. The prepared PAni-CoFe2O4 nanocomposite and flexible PET-PAni-CoFe2O4 sensor were evaluated for their thermal stability, surface morphology and materials composition. The response to NH3 gas of the developed sensor was examined thoroughly in the range of 1–50 ppm at room temperature. The sensor with 50 wt% CoFe2O4 NPs content showed an optimum selectivity to NH3 molecules, with a 118.3% response towards 50 ppm in 24.3 s response time. Furthermore, the sensor showed good reproducibility, ultra-low detection limit (25 ppb) and excellent flexibility. In addition, the relative humidity effect on the sensor performance was investigated. Consequently, the flexible PET-PAni-CoFe2O4 sensor is a promising candidate for trace-level on-site sensing of NH3 in wearable electronic or portable devices.


Author(s):  
Sudhanshu Singh ◽  
Umesh Kumar Dwivedi

In this critical review chapter, the authors explain the development of composite films of Barium Titanate (BaTiO3) and Poly (methyl methacrylate) prepared by solution casting technique. Different weight percentage composition of BaTiO3 has been selected to find out the best optimization condition for further investigation and correlate the results. The structural properties have been carried out at room temperature using XRD. Efforts have been made to correlate the results with investigated XRD results of pure BaTiO3 and its composites as observed by other workers at room temperature. The flow of experimental work and microscopic images are explained.


Author(s):  
B. Kobrin ◽  
J. Chin ◽  
W. R. Ashurst

Results on the thermal and immersion stability of ultra-thin composite films created by a deposition method call MVD™ (Molecular Vapor Deposition [1]) are reported. It is observed that these composite films were denser and more stable in thermal and immersion applications when compared to traditional self-assembled monolayer (SAM) films. These improved films were created by a special “sequential” or “layered” deposition process sequence. The MVD™ composite coatings can be deposited at room temperature on a variety of materials such as polymers, fibers, metals, alloys and other materials which normally do not allow films to form with complete surface coverage.


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