Thin Solid Film
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Physical Vapor Deposited Films of a Perylene Derivative: Supramolecular Arrangement and Thermal Stability
The analysis of supramolecular arrangement is essential to understand the role of this key factor on the optical and electrical properties of organic thin films. In this work, thin solid films of bis(phenethylimido) perylene (PhPTCD) fabricated using physical vapor deposition (PVD) technique (thermal evaporation), deposited simultaneously onto different subs
Mat. Res.. Publicado em: 23/03/2017
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2. Multilayer Graphene Films Obtained by Dip Coating Technique
A dip coating system was projected and constructed to deposit a large range of thin films onto solid substrates. A microcontroller was used to control the deposition system. As an example of application multilayer graphene (MLG) films were deposited onto glass slices in order to obtain conductive films with relatively good light transmittance. The MLG flakes
Mat. Res.. Publicado em: 2015-08
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3. CARACTERIZAÇÃO DE NANOFIOS DE GERMÂNIO SINTETIZADOS UTILIZANDO COBRE COMO CATALISADOR
This paper presents reliable synthesis of germanium nanowires by the vapor-liquid-solid method using copper as an alternative catalyst to gold, the most commonly used metal. The morphological study showed long range single-crystalline germanium nanowires with diamond structure and diameters ranging from 20 nm to 80 nm and lengths in tenths of a micrometer
Quím. Nova. Publicado em: 2015-07
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4. Thin film-XRF determination of uranium following thin-film solid phase extraction
Foi desenvolvido um método sensível baseado na pré-concentração de urânio em papel de filtro modificado (filme fino) para a determinação deste elemento em amostras de águas e de solos, usando a técnica de fluorescência de raios-X de comprimento de onda dispersivo. Para a extração de urânio (VI), 100 mL de amostra reagiram com tri-octil fosfina
J. Braz. Chem. Soc.. Publicado em: 2014-06
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5. Construção e caracterização de célula solar tipo barreira Schottky CdTe/Al / Construction and caracterization of Schottky barrier solar cells CdTe/Al
In this work the techniques of hot wall epitaxy (HWE) and molecular beam epitaxy (MBE) on thin films of CdTe (cadmium telluride) were used in order to manufacture a prototype solar cell type Schottky barrier. The films were produced by evaporation of a solid alloy of CdTe, varying two parameters of deposition: the growth time and substrate temperature. In th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2011
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6. Fabricação e caracterização de filmes automontados de PAH/BSA / Fabrication and characterization of LbL films of PAH / BSA
In the last years techniques have been developed for the development of science and technology concerning all science fields, such as physics, chemistry and biology. The study of the protein adsorption processes on the solid surfaces is of great importance in the development of biocompatible materials. The Layer-by-Layer deposition technique, where self-asse
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2010
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7. Neutron induced radiography: a technique to inspect the internal structure of thin samples
The present paper describes a radiography technique to inspect low thickness samples, on the order of micra. The penetrating radiation are charged particles generated by a lithium fluoride screen irradiated by thermal neutrons. The film used to register the images is a solid state nuclear track detector and the experimental conditions to obtain the best radi
Brazilian Journal of Physics. Publicado em: 2008-09
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8. Characteristics of flow in wet conical spouted beds of unequal-sized spherical Particles
Interparticle forces, developed in wet spouted beds composed of a mixture of spherical particles with different size distributions, intensify particle segregation mechanisms interfering in gas distribution inside the bed and, consequently, in the spouting flow characteristics. Therefore, this paper is aimed at describing the effect of interparticle forces on
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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9. Estudos voltamétricos e microgravimétricos da deposição em subtensão de cádmio e chumbo sobre filmes finos de selênio / Voltammetric and microgravimetric studies of underpotential deposition of cadmium and lead on selenium thin films
Cd and Pb underpotential deposition (UPD) on gold electrode and selenium thin film, from acid media, were studied using cyclic voltammetry (CV) and electrochemical quartz crystal microbalance (EQCM). Different form of deposition for cadmium and lead were observed on gold electrode and selenium thin film. The presence of one peak in the positive sweep with a
Publicado em: 2008
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10. Estudo de conformação de cerâmicas à base de zircônia para aplicação em células a combustível do tipo óxido sólido / STUDY OF TAPE CASTING OF YTTRIA STABILIZED ZIRCONIA FOR APPLY IN SOLID OXIDE FUEL CELL
The hydrogen economy has been risen as new option for supply the growing global demand for energy. A fuel cell is an electrochemical device able to use hydrogen as a energy source. Carbon dioxide (CO2) emission is very low so it is ecologically friendly, once energy is produced by a reaction of hydrogen and oxygen. The production of energy from hydrogen fuel
Publicado em: 2008
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11. Nanoparticle self-assembly using patterns formed by dewetting / Auto-organização de nanoparticulas utilizando padrões formados por transição de molhabilidade
In this work, we study an original method to promote self-assembly of gold and silica nanoparticles using patterns formed by dewetting of aqueous solutions of poly (N-isopropylacrylamide) (PNIPAM) and sodium dodecylsulfate (SDS). Dewetting is a process where the free surface of an initially stable thin liquid film becomes unstable and deforms to engender rup
Publicado em: 2007
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12. "Electrochromic devices with solid polymeric electrolytes based on starch" / "Dispositivos eletrocrômicos com eletrólitos sólidos poliméricos à base de amido"
This dissertation presents the results of preparation and characterization of five electrochromic devices (DEC) composed of thin films of transition metal oxides, such as WO3, WO3:Ta, Nb2O5:Mo and NiOx as electrochromic layers and CeO2-TiO2 as a transparent counter-electrode. The electrolytes used in these devices were starch-based plasticized with glycerol
Publicado em: 2006