Thin Films
Mostrando 13-24 de 594 artigos, teses e dissertações.
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13. Influence of doping with Sm3+ on photocatalytic reuse of ZnO thin films obtained by spin coating
ABSTRACT The difficulty in the powder reuse favors the study of materials in the form of thin films. ZnO based films have high photocatalytic potential. In this work, ZnO:xSm3+ (x = 0, 1, 2 and 4 %mol) thin films were prepared by spin coating method. The resins obtained to manufacture the thin films were prepared by complex polymerization method. The samples
Matéria (Rio J.). Publicado em: 25/11/2019
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14. Monochromatic double coloring effect on V2O5 thin films deposited by electron beam
ABSTRACT Electrochromic material is a thin film technology that has a close relationship with environmental sustainability since they can control the light and heat that enter and leave a building. Vanadium oxide films are electrochemically active for lithium and electron co-intercalation, presenting low optical variation in the low energy visible light, whi
Matéria (Rio J.). Publicado em: 25/11/2019
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15. Avaliação dos processos de fratura em filmes finos através da simulação de ensaios de indentação com penetradores esféricos
RESUMO Recentes trabalhos propõem a utilização dos ensaios de indentação como uma ferramenta capaz de avaliar características mecânicas de filmes finos, assim como avaliar possíveis falhas em sistemas que conjugam filmes de alta dureza depositados em substratos metálicos em solicitações tribológicas. Entretanto, a implementação da técnica de i
Matéria (Rio J.). Publicado em: 25/11/2019
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16. Study of obtaining thin films of CeO2 doped with 2 and 4 mol% of europium, terbium and thulium by spin coating: photocatalytic properties
Resumo Neste estudo, filmes finos de CeO2 dopados com Eu3+, Tb3+ e Tm3+ nas proporções de 2 e 4 %mol foram obtidos por spin coating e calcinados em 700 °C. Os filmes foram caracterizados pelas técnicas de DRX, MEV, MFA e UV-vis. As propriedades fotocatalíticas dos filmes finos foram determinadas pela degradação do corante azul de metileno (AM). Os fil
Cerâmica. Publicado em: 14/11/2019
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17. Design of Three-Layer Antireflection Coating for High Reflection Index Lead Chalcogenide
Antireflection coatings (ARC), not only reduce the reflection of the incident radiation but also protect the surface from environmental degradations. In present study, three- layer design was theoretically calculated and experimentally realized on the surface of lead chalcogenide, which had high refractive characteristics. First the theoretical designs of th
Mat. Res.. Publicado em: 11/11/2019
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18. Interrelation Among Morphology, Mechanical Properties and Oxidation Behavior of NbxAlyNz Thin Films
NbxAlyNz thin films were deposited by magnetron sputtering reactive technique with (y/x+y) ratio varying from 0 to 0.4, in order to maintain aluminum atoms inside NbN matrix in solid solution. GAXRD analyses revealed that the crystalline phase obtained for NbxAlyNz thin films was B1-NbN with a lattice constant shrinkage as Al concentration at these coatings
Mat. Res.. Publicado em: 07/11/2019
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19. Corrosion and Micro-abrasive Wear Behaviour of 2524-T3 Aluminium Alloy with PAni-NPs/PSS LbL Coating
In this paper, we present an alternative method to obtain thin films for coating protection on the surface of the AA2524-T3 Al-alloy by using the Layer-by-Layer (LbL) technique. The LbL films were fabricated by alternated immersion of the Al-alloy into a poly(styrene sulfonate) (PSS) and polyaniline nanoparticles (PAni-NPs) solutions, obtaining a PAni-NPs/PS
Mat. Res.. Publicado em: 06/06/2019
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20. Influência da densidade de potência e da porcentagem de N2 na atmosfera de deposição na dureza e no módulo de Young em filmes de aço inoxidável AISI 316 depositados por pulverização catódica
RESUMO O processo de recobrimento por pulverização catódica é uma técnica amplamente utilizada para produção de revestimentos metálicos e cerâmicos, devido a versatilidade no controle das propriedades com pequenas mudanças nos parâmetros de processo, como densidade de potência aplica ao cátodo magnetron e atmosfera de trabalho. Sendo assim, as p
Matéria (Rio J.). Publicado em: 20/05/2019
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21. Análise comparativa das propriedades elétricas de camadas e multicamadas de VOx depositadas por pulverização catódica para aplicação em bolômetros
RESUMO Filmes finos de VOX (camada e multicamadas) foram fabricados por pulverização catódica com rádiofrequência assistida por campo magnético constante para aplicação em detectores de radiação infravermelha do tipo bolômetro. As amostras foram fabricadas sem quebra de vácuo a partir de três alvos: V2O3; VO2 e V2O5. Um sistema de pulverização
Matéria (Rio J.). Publicado em: 20/05/2019
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22. Al-doping and Properties of AZO Thin Films Grown at Room Temperature: Sputtering Pressure Effect
Aluminum zinc oxide (AZO) thin films were synthesized on glass substrates by radio frequency (rf) magnetron sputtering from a metallic Zn-Al (5 at. %) target at room temperature. The morphological, structural, electrical and optical properties of the films were studied as a function of the sputtering pressure, which was varied from 0.1 to 6.7 Pa. X-ray diffr
Mat. Res.. Publicado em: 09/05/2019
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23. Temperature Dependence of Electrical Resistance in Ge-Sb-Te Thin Films
Nowadays, the Ge-Sb-Te system is studied extensively for use in the field of both electrical and optical non-volatile memories. The key of this application is based on the changes in the physical properties (electrical conductivity or refractive index) of these films as a result of structural transformation between amorphous and crystalline states. Both stat
Mat. Res.. Publicado em: 18/02/2019
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24. Structural and Optical Properties of GaN Thin Films Grown on Si (111) by Pulsed Laser Deposition
In this work we present results and analysis concerning the processing and characterization of Gallium Nitride (GaN) thin films (TF) grown on Si (111) substrates by pulsed laser deposition technique (PLD), which were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and Raman spectroscopy (RS). The GaN films show
Mat. Res.. Publicado em: 14/01/2019