scholarly journals Спектральные оптические свойства керамических нанопористых мембран на основе анодного оксида алюминия и покрытия из серебра в парах аммиака

2022 ◽  
Vol 130 (2) ◽  
pp. 305
Author(s):  
М.Ю. Васильков ◽  
И.Н. Михайлов ◽  
Ю.В. Никулин ◽  
С.С. Волчков ◽  
Д.А. Зимняков ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Anodic Aluminum Oxide ◽  
Gas Flow ◽  
Silver Film ◽  
Film Surface ◽  
Nanoporous Membranes ◽  
Transmission Spectra ◽  
Equilibrium Conditions ◽  
Ammonia Gas ◽  
Anodic Aluminum

Spectral optical properties of synthesized ceramic nanoporous membranes based on anodic aluminum oxide coated silver in saturated ammonia gas flow have been experimentally investigated. Based on the measured transmission spectra and detected interference part of the spectra in wavelength range from 550 to 900 nm, temporal and spectral dependencies of the effective optical thickness and its changes in non-equilibrium conditions were obtained due to adsorption of ammonia molecules on silver film surface. According to detected and measured interference maximum shifts up to 14 nm in transmission spectra of Al2O3 + Ag membranes in ammonia gas flow, the possibility of constructing a selective interferometric optical sensors with 10 − 15 min response time is shown.

Fabrication of Anisotropic Super Hydrophobic/Hydrophilic Nanoporous Membranes by Plasma Polymerization of C[sub 4]F[sub 8] on Anodic Aluminum Oxide

2004 ◽  
Vol 151 (8) ◽  
pp. B484 ◽  
Author(s):  
Dmitri A. Brevnov ◽  
Marcos J. Barela ◽  
Matthew J. Brooks ◽  
Gabriel P. López ◽  
Plamen B. Atanassov
Keyword(s):  
Aluminum Oxide ◽  
Plasma Polymerization ◽  
Anodic Aluminum Oxide ◽  
Nanoporous Membranes ◽  
Anodic Aluminum

scholarly journals Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films

2021 ◽  
Vol 11 (15) ◽  
pp. 6675
Author(s):  
Tran Si Trong Khanh ◽  
Tran Quang Trung ◽  
Le Thuy Thanh Giang ◽  
Tran Quang Nguyen ◽  
Nguyen Dinh Lam ◽  
...  
Keyword(s):  
Response Time ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Composite Films ◽  
Weight Ratio ◽  
Film Surface ◽  
Relative Sensitivity ◽  
Ammonia Gas ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotubes

In this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (called PGC-60). This weight ratio leads to the formation of nanostructured composites, causing the efficient adsorption/desorption of ammonia gas in/out of the film surface. The sensor based on PGC-60 possessed a response time of 30 s, sensitivity up to 3.6% at ammonia gas concentration of 10 ppm, and relative sensitivity of 0.031%/ppm. These results could be attributed to excellent electron transportation of rGO, the main adsorption activator to NH3 gas of P3HT, and holes move from P3HT to the cathodes, which works as charge “nano-bridges” carriers of Multi-Walled Carbon Nanotubes (MWCNTs). In general, these three components of PGC sensors have significantly contributed to the improvement of both the sensitivity and response time in the NH3 gas sensor.

Fabrication of Anodic Aluminum Oxide Film on Large-Area Glass Substrate

2007 ◽  
Vol 10 (12) ◽  
pp. C69 ◽  
Author(s):  
Ching-Jung Yang ◽  
Shih-Wei Liang ◽  
Pu-Wei Wu ◽  
Chih Chen ◽  
Jia-Min Shieh
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Glass Substrate ◽  
Anodic Aluminum Oxide ◽  
Large Area ◽  
Anodic Aluminum Oxide Film ◽  
Aluminum Oxide Film ◽  
Anodic Aluminum
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