A uniform porous multilayer-junction thin film for enhanced gas-sensing performance

Nanoscale ◽  
2016 ◽  
Vol 8 (3) ◽  
pp. 1430-1436 ◽  
Author(s):  
Ping-Ping Zhang ◽  
Hui Zhang ◽  
Xu-Hui Sun
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Gas Sensing ◽  
Soft Template ◽  
Deposition Technique ◽  
Sputtering Deposition ◽  
Porous Thin Films ◽  
Self Assembled ◽  
Highly Uniform ◽  
Sensing Performance

Highly-uniform In2O3/CuO bilayer and multilayer porous thin films were successfully fabricated using a self-assembled soft template and a simple sputtering deposition technique.

Properties of indium doped nanocrystalline ZnO thin films and their enhanced gas sensing performance

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 61230-61238 ◽  
Author(s):  
Sumati Pati ◽  
P. Banerji ◽  
S. B. Majumder
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Gas Sensing ◽  
Zno Thin Films ◽  
Zno Thin Film ◽  
Indium Concentration ◽  
Doped Zno ◽  
Undoped Counterpart ◽  
Sensing Performance

Enhancement of gas sensing performance of indium doped ZnO thin film at optimal indium concentration as compared to its undoped counterpart.

scholarly journals Preparation, Characterization and Gas Sensing Performance of Pure SnO2 Thin Films Deposited using Physical Vapour Deposition Technique

2016 ◽  
Vol 4 (2) ◽  
pp. 103
Author(s):  
K. S. Thakare ◽  
S. J. Patil ◽  
S. B. Deshmukh ◽  
R. Y. Borse ◽  
R. R. Ahire
Keyword(s):  
Thin Films ◽  
Measurement Method ◽  
Vapour Deposition ◽  
Gas Sensing ◽  
Pure Sno2 ◽  
Physical Vapour Deposition ◽  
Deposition Technique ◽  
Gas Sensing Properties ◽  
Sno2 Thin Films ◽  
Sensing Performance

<em>Nanocrystalline SnO<sub>2</sub> thin films were successfully prepared using Physical Vapour Deposition technique and were annealed at 400<sup>o</sup>C. Structural, morphological, elemental, compositional, optical, and electrical and gas sensing properties were studied using XRD, FESEM, EDXS, UV-Vis Spectrophotometer, DC resistance measurement method respectively. Acetone, Cl<sub>2</sub>, CO<sub>2</sub>, Ethanol, H<sub>2</sub>S and NH<sub>3</sub> sensing performance of Nanocrystalline physically vaporized SnO<sub>2</sub> thin films were investigated and reported in this paper. The results were systematically tabulated, interpreted and discussed. </em>

Crack-Free Periodic Porous Thin Films Assisted by Plasma Irradiation at Low Temperature and Their Enhanced Gas-Sensing Performance

2013 ◽  
Vol 19 (40) ◽  
pp. 13387-13395 ◽  
Author(s):  
Zhengfei Dai ◽  
Lichao Jia ◽  
Guotao Duan ◽  
Yue Li ◽  
Hongwen Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Gas Sensing ◽  
Plasma Irradiation ◽  
Porous Thin Films ◽  
Sensing Performance

Self-assembled morphologies of an amphiphilic Y-shaped weak polyelectrolyte in a thin film

2017 ◽  
Vol 19 (46) ◽  
pp. 31011-31023 ◽  
Author(s):  
Dan Mu ◽  
Jian-Quan Li ◽  
Sheng-Yu Feng
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Aggregate Size ◽  
Cylindrical Structures ◽  
Self Assembled

The introduction of charges leads to a smaller aggregate size and lower density; moreover, crossed-cylindrical structures are produced in thicker thin films.

scholarly journals WO3 nanorolls self-assembled as thin films by hydrothermal synthesis

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7174-7177 ◽  
Author(s):  
S. Vankova ◽  
S. Zanarini ◽  
J. Amici ◽  
F. Cámara ◽  
R. Arletti ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Hydrothermal Synthesis ◽  
Conductive Substrate ◽  
Self Assembled

We report a novel type of WO3 nanostructure, i.e. nanorolls obtained as a self-assembled thin film on a transparent conductive substrate.

Effect of Temperature on the Electrical and Gas Sensing Properties of Polyaniline and Multiwall Carbon Nanotube Doped Polyaniline Composite Thin Films

2011 ◽  
Vol 254 ◽  
pp. 167-170 ◽  
Author(s):  
Subodh Srivastava ◽  
Sumit Kumar ◽  
Vipin Kumar Jain ◽  
Y.K. Vijay
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Composite Thin Film ◽  
Effect Of Temperature ◽  
Multiwall Carbon Nanotube ◽  
Film Sensor ◽  
Composite Thin Films ◽  
Pani Composite

In the present work we have reported the effect of temperature on the gas sensing properties of pure Polyaniline (PANI) and Multiwall carbon nanotube (MWNT) doped PANI composite thin film based chemiresistor type gas sensors for hydrogen gas sensing application. PANI and MWNT doped PANI composite were synthesized by in situ chemical oxidative polymerization of aniline using ammonium persulfate in an acidic medium. The thin sensing film of chemically synthesized PANI and MWNT doped PANI composite were deposited onto finger type Cu-interdigited electrodes using spin cast technique to prepared chemiresistor type gas sensor. The electrical properties of these composite thin films were characterized by I-V measurements as function of temperature. The I-V measurement revealed that conductivity of composite thin films increased as the temperature increased. The changes in resistance of the composite thin film sensor were utilized for detection of hydrogen gas. It was observed that at room temperature, MWNT doped PANI composite sensor shows higher response value and sensitivity with good repeatability in comparison to pure PANI thin film sensor. It was also observed that both PANI and MWNT doped PANI composite thin film based sensors showed unstable behavior as the temperature increased. The surface morphology of these composite thin films has also been characterized by scanning electron microscopy (SEM) measurement.

scholarly journals Design and Synthesis of Novel 2D Porous Zinc Oxide-Nickel Oxide Composite Nanosheets for Detecting Ethanol Vapor

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1989
Author(s):  
Yuan-Chang Liang ◽  
Yen-Cheng Chang ◽  
Wei-Cheng Zhao
Keyword(s):  
Zinc Oxide ◽  
Nickel Oxide ◽  
Active Sites ◽  
Gas Sensing ◽  
Ethanol Vapor ◽  
Gas Diffusion ◽  
High Specific Surface Area ◽  
Sputtering Deposition ◽  
Vapor Sensing ◽  
Sensing Performance

The porous zinc oxide-nickel oxide (ZnO-NiO) composite nanosheets were synthesized via sputtering deposition of NiO thin film on the porous ZnO nanosheet templates. Various NiO film coverage sizes on porous ZnO nanosheet templates were achieved by changing NiO sputtering duration in this study. The microstructures of the porous ZnO-NiO composite nanosheets were investigated herein. The rugged surface feature of the porous ZnO-NiO composite nanosheets were formed and thicker NiO coverage layer narrowed the pore size on the ZnO nanosheet template. The gas sensors based on the porous ZnO-NiO composite nanosheets displayed higher sensing responses to ethanol vapor in comparison with the pristine ZnO template at the given target gas concentrations. Furthermore, the porous ZnO-NiO composite nanosheets with the suitable NiO coverage content demonstrated superior gas-sensing performance towards 50–750 ppm ethanol vapor. The observed ethanol vapor-sensing performance might be attributed to suitable ZnO/NiO heterojunction numbers and unique porous nanosheet structure with a high specific surface area, providing abundant active sites on the surface and numerous gas diffusion channels for the ethanol vapor molecules. This study demonstrated that coating of NiO on the porous ZnO nanosheet template with a suitable coverage size via sputtering deposition is a promising route to fabricate porous ZnO-NiO composite nanosheets with a high ethanol vapor sensing ability.

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