Chemical Vapor Deposition
Mostrando 13-24 de 143 artigos, teses e dissertações.
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13. Effects of Aging on Chlorinated Plasma Polymers
Thin films deposited from propanol-chloroform-argon mixtures by plasma enhanced chemical vapor deposition at different partial pressures of chloroform in the feed, CCl, were characterized after two years of aging and their characteristics compared with their as-deposited properties. Film thickness decreased and surface roughness increased with aging. Surface
Mat. Res.. Publicado em: 20/03/2017
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14. Diamond Films on Stainless Steel Substrates with an Interlayer Applied by Laser Cladding
The objective of this work is the Hot Filament Chemical Vapor Deposition (HFCVD) of diamond films on stainless steel substrates using a new technique for intermediate barrier forming, made by laser cladding process. In this technique, a powder layer is irradiated by a laser beam to melt the powder layer and the substrate surface layer to create the interlaye
Mat. Res.. Publicado em: 06/03/2017
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15. Composite Films from Polystyrene with Hydroxyl end Groups and Carbon Nanotubes
Composites from polystyrene with hydroxyl end groups and multiwall carbon nanotubes were fabricated to evaluate their properties. The Carbon Nanotubes (CNTs) were synthetized by chemical vapor deposition technique using ferrocene and benzene as precursors. Polystyrene with hydroxyl end groups was prepared by solution polymerization employing styrene as monom
Mat. Res.. Publicado em: 09/02/2017
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16. Study of the Adsorption of Arsenic (III and V) by Magnetite Nanoparticles Synthetized via AACVD
Globally, water pollution is mainly caused by the presence of heavy metals and metalloids such as arsenic. The majority of the techniques employed in the removal are of low efficiency and high cost. Therefore, in this work it is presented the adsorption processes of arsenic (As III and V) ions employing magnetite nanoparticles (MNPs) synthesized by the aeros
Mat. Res.. Publicado em: 08/12/2016
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17. Synthesis and Microstructural Characterization of SnO2:F Thin Films Deposited by AACVD
In this work, we report the synthesis and microstructural characterization of Tin oxide thin films doped with fluorine for applications such as transparent conductive oxides. Tin oxide doped with fluorine thin films were deposited by aerosol assisted chemical vapor deposition technique onto a borosilicate glass substrate, using a precursor solution of stanni
Mat. Res.. Publicado em: 31/10/2016
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18. Optical Band Gap Estimation of ZnO Nanorods
Abstract The optical band gap energy of ZnO nanorods was estimated by different methods found in literature. These nanorods were deposited onto TiO2 covered borosilicate glass substrates by aerosol assisted chemical vapor deposition. Characterization techniques were employed to reveal the crystalline structure, surface morphology and optical properties of th
Mat. Res.. Publicado em: 28/07/2016
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19. Boron Doped Ultrananocrystalline Diamond Films on Porous Silicon: Morphological, Structural and Electrochemical Characterizations
Boron doped ultrananocrystalline diamond (BDUND) films were grown and characterized on porous silicon (PS) substrates. PS samples were prepared from n-type monocrystalline silicon wafers (100) with 1-20 Ω.cm of resistivity, by electrochemical etching, using HF-acetonitrile solution as electrolyte. BDUND films were grown by Hot Filament Chemical Vapor Deposi
Mat. Res.. Publicado em: 24/11/2015
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20. Syntesis of Carbon Nanostructures Near Room Temperature Using Microwave PECVD
Carbon nanostructures (nanotubes, nanofibers and nanosponges) were synthesized onto Si (001) substrates using a microwave assisted plasma enhanced chemical vapor deposition (PECVD) from C2H2-Ar mixtures at low substrate temperatures (120 °C). Catalytic films (Ni and Cu) 3 nm thick were used. Different structures were formed, depending on the C2H2 partial pr
Mat. Res.. Publicado em: 2015-08
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21. Characterization of TiCN thin films deposited by Dc-Pulsed PACVD using methane precursor
Titanium carbonitride (TiCN) thin films were deposited on hot-work steel (DIN 1.2606) by plasma-assisted chemical vapor deposition (PACVD) and the influence of different CH4/ (CH4+N2) gas flow ratio, on the layer mechanical properties, were investigated. SEM studies indicated that the growth rate is decreased by increasing the CH4/ (CH4+N2) gas flow ratio. I
Mat. Res.. Publicado em: 2014-12
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22. Indium tin oxide synthesized by a low cost route as SEGFET pH sensor
Polycrystalline ITO films with good optoelectronics characteristics and homogeneous surface has been obtained upon annealing at 550 °C in N² atmosphere using a low-cost chemical vapor deposition (CVD) system. The films were evaluated as pH sensors in separative extended gate field-effect transistor (SEGFET) apparatus, exhibiting a sensitivity of 53 mV/pH,
Mat. Res.. Publicado em: 02/07/2013
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23. Proposed model for biomineralization of novel nanohydroxyapatite/vertically aligned multiwalled carbon nanotube scaffolds
For the first time, the growth mechanism of biominerals formed on plate-like nanohydroxyapatite (nHAp) electrodeposited on superhydrophilic vertically aligned multi-walled carbon nanotubes (VAMWCNT-O2) is presented and a model for the specific growth preference is discussed. VAMWCNT-O2 films were obtained by microwave-assisted chemical vapor deposition metho
Mat. Res.. Publicado em: 08/03/2013
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24. Análise de filmes antirreflexo de dióxido de titânio e nitreto de silício em células solares P+NN+
In this work we compared the antireflection coatings of titanium dioxide and silicon nitride for p+nn+ solar cell fabrication. This type of solar cell is more stable in the long term compared to n+pp+ cells and allows obtaining higher efficiencies. TiO2 films were produced by evaporation in high vacuum by electron beam and by chemical vapor deposition at atm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2012