Dodecane Sensing with Double Substituted LaCoO3 Nanowires Deposited by Reactive Magnetron Sputtering

2013 ◽  
Vol 543 ◽  
pp. 192-195 ◽  
Author(s):  
Mohammad Arab Pour Yazdi ◽  
Jean Baptiste Sanchez ◽  
Eric Monsifrot ◽  
Pascal Briois ◽  
Franck Berger ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Perovskite Structure ◽  
Electrical Response ◽  
Electrical Signal ◽  
Perovskite Oxide ◽  
Gas Mixture ◽  
Reactive Magnetron ◽  
Oxide Nanowires ◽  
Low Concentrations ◽  
Oxygen Gas

This paper reports results of dodecane-sensing studies with double-substituted LaCoO3perovskite oxide nanowires. La0.40Sr0.15Ag0.45CoO3-αnanowires were co-sputtered from metallic La, Sr, Ag and Co targets in the presence of a reactive argon-oxygen gas mixture. As deposited coatings are amorphous and crystallise in the perovskite structure after annealing at 873 K for 2 hours under air. Electrical response of the La0.40Sr0.15Ag0.45CoO3-αnanowires was measured at different temperature under air and under air containing 1 to 100 ppm (v) of dodecane vapour. The electrical signal of the nanowires was found to be high and it was possible to detect low concentrations of dodecane (under 5 ppm (v) ) at 573 K.

Band gap modulation of ZnTe1-xOx alloy film by control of oxygen gas flow rate during reactive magnetron sputtering

2013 ◽  
Vol 103 (26) ◽  
pp. 263901 ◽  
Author(s):  
Dong Uk Lee ◽  
Seon Pil Kim ◽  
Kyoung Su Lee ◽  
Sang Woo Pak ◽  
Eun Kyu Kim
Keyword(s):  
Magnetron Sputtering ◽  
Band Gap ◽  
Flow Rate ◽  
Gas Flow ◽  
Alloy Film ◽  
Reactive Magnetron Sputtering ◽  
Reactive Magnetron ◽  
Gas Flow Rate ◽  
Oxygen Gas ◽  
Band Gap Modulation

Synthesis and Characterization of Ag Doped LaCoO3 Nanowire Sputter-Deposited Coatings as Heavy Hydrocarbon Sensors

2014 ◽  
Vol 605 ◽  
pp. 314-317 ◽  
Author(s):  
Amine Taguett ◽  
Mohammad Arab Pour Yazdi ◽  
Jean Baptiste Sanchez ◽  
Eric Monsifrot ◽  
Pascal Briois ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetron Sputtering ◽  
Structural Characterization ◽  
Perovskite Structure ◽  
Short Description ◽  
Synthesis And Characterization ◽  
Reactive Magnetron ◽  
Post Heat Treatment ◽  
Sputter Deposited

In this paper, we investigate the feasibility of La1-xAgxCoO3-α nanowires by reactive magnetron sputtering. After a short description of the experimental and hydrocarbon sensing bench devices, a first part will be dedicated to the chemical, microstructural and structural characterization (SEM, XRD,...) of the coatings. As deposited coatings are amorphous and a post heat-treatment under air at 873 K is necessary to crystallise them in the perovskite structure. Finally, the performance as dodecane-sensors of these coatings with amorphous and crystalline structures will be discussed depending on dodecane concentrations and sensitive surfaces temperature and will be compared to those of La0.40Sr0.15Ag0.45CoO3-α nanowires.

scholarly journals Структурные и магнитные характеристики однослойных и многослойных наногранулированных пленок Co-Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-, полученных методом твердофазного синтеза

2018 ◽  
Vol 60 (7) ◽  
pp. 1409 ◽  
Author(s):  
М.Н. Волочаев ◽  
С.В. Комогорцев ◽  
В.Г. Мягков ◽  
Л.Е. Быкова ◽  
В.С. Жигалов ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Vacuum Annealing ◽  
Argon Atmosphere ◽  
Gas Mixture ◽  
Multilayer Thin Films ◽  
Reactive Magnetron ◽  
Metallic Cobalt ◽  
Aluminum Target ◽  
Al Thin Film ◽  
Pure Argon Atmosphere

AbstractThe results of structural and magnetic investigations of nanogranular Co–Al_2O_3 films formed from Co_3O_4/Al thin-film layered structures upon vacuum annealing are reported. The Co_3O_4/Al films have been obtained by sequential reactive magnetron sputtering of a metallic cobalt target in a medium consisting of the Ar + O_2 gas mixture and magnetron sputtering of an aluminum target in the pure argon atmosphere. It is shown that such a technique makes it possible to obtain nanogranular Co–Al_2O_3 single- and multilayer thin films with a well-controlled size of magnetic grains and their distribution over the film thickness.

scholarly journals Photoluminescence and structural defects of ZnO films deposited by reactive magnetron sputtering with unconventional Ar-O2 gas mixture formation

2021 ◽  
Author(s):  
Kristina Bockute ◽  
Keyword(s):  
Magnetron Sputtering ◽  
Band Gap ◽  
Reactive Magnetron Sputtering ◽  
Structural Defects ◽  
Zno Films ◽  
Composition Analysis ◽  
Gas Mixture ◽  
Reactive Magnetron ◽  
Intrinsic Defects ◽  
Wide Range

ZnO is a well-known traditional industrial material which has high potential to become one of the key components for the next generation of future electronics, LED emitters, visible light photocatalysis and others. In its pristine form ZnO has relatively wide band gap of approximately 3.4 eV, but a lot of emerging applications requires some level of electronic structure engineering and structure optimisation. Studies show that ZnO properties strongly depend on the intrinsic defects type and concentrations. Both characteristics usually are depending on the synthesis method. Accordingly, there is great interest to develop new methods which would allow to obtain ZnO with optimised band gap and other properties. In current, study ZnO films were deposited using reactive magnetron sputtering with unconventional Ar-O2 gas mixture supply control: Ar flow was controlled to maintain total gas pressure at 1x10-2 mbar, whereas O2 flow rate was actively adjusted to maintain the selected intensity of optical zinc emission from the working cathode zone. Applying such ZnO formation method it was possible to stabilise reactive magnetron sputtering process over wide range of conditions. Elemental composition analysis by XPS revealed that despite large variations in Zn emission peak intensity within tested experimental conditions all films had nearly identical Zn:O ratios but at the same time their structural and optical properties differed significantly. The colour of the films varied from highly transparent yellowish-greenish, to intense orange, to opaque black. XRD analysis showed that films consisted of single polycrystalline wurtzite phase with varying orientations. PL spectroscopy analysis revealed that films had a lot of various defects including oxygen and zinc vacancies, interstitials and surface defects. Wide variation of ZnO properties obtained by different reactive sputtering conditions demonstrates the potential of the proposed method to control the formation of various intrinsic defects and to tailor their concentration.

Voltage-controlled reactive magnetron sputtering of Nb-doped TiO2 films: electrical and optical properties

MRS Advances ◽  
2016 ◽  
Vol 1 (46) ◽  
pp. 3139-3144
Author(s):  
Stefan Seeger ◽  
Klaus Ellmer ◽  
Michael Weise ◽  
Johanna Reck ◽  
Rainald Mientus
Keyword(s):  
Magnetron Sputtering ◽  
Gas Flow ◽  
Discharge Voltage ◽  
Reactive Magnetron Sputtering ◽  
High Electron ◽  
Reactive Magnetron ◽  
Magnetron Discharge ◽  
Sputtering Deposition ◽  
Oxygen Gas ◽  
Deposited Films

ABSTRACTNiobium-doped TiO2 films as highly transparent conducting oxidic electrodes were prepared by reactive magnetron sputtering from a titanium target in an argon-oxygen gas flow. As-deposited films were amorphous and exhibited high resistivities ranging from 10 to 1×105 Ω cm in dependence on the deposition parameters. We stabilized the reactive magnetron sputtering deposition by adjusting the magnetron discharge voltage at a constant oxygen gas flow. The precise process control during the preparation of the as-deposited films was essential to gain low resistivities (10-3 Ω cm) and low optical absorption coefficients (α550nm < 2×103 cm-1) after annealing. These polycrystalline TiO2:Nb films on borosilicate glass show a quite high electron concentration > 1×1020 cm-3 and a high carrier mobility (≈ 8 cm2 V-1 s-1).

scholarly journals Ion formation in an argon and argon-oxygen gas mixture of a magnetron sputtering discharge

2019 ◽  
Vol 3 (5) ◽  
pp. 055011 ◽  
Author(s):  
R Hippler ◽  
M Cada ◽  
V Stranak ◽  
Z Hubicka
Keyword(s):  
Magnetron Sputtering ◽  
Gas Mixture ◽  
Ion Formation ◽  
Oxygen Gas
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