Transparent Materials
Mostrando 13-24 de 48 artigos, teses e dissertações.
-
13. ELETRODOS DE FTO MODIFICADOS POR ELETRODEPOSIÇÃO DIRETA DE OURO: PRODUÇÃO, CARACTERIZAÇÃO E APLICAÇÃO COMO SENSOR ELETROQUÍMICO
Chemically modified electrodes have been studied to obtain new and better electrochemical sensors. Transparent conductive oxides, such as fluorine-doped tin-oxide (FTO), shows electrical conductivity comparable to metals and are potential candidates for new sensors. In this work, FTO was modified by gold electrodeposition from chlorine-auric acid solution us
Quím. Nova. Publicado em: 2016-02
-
14. NIR Luminescence from Sol-Gel Er3+ Doped SiO2:GeO2 Transparent Gels, Nanostructured Powders and Thin Films for Photonic Applications
Samples of (1 – x)SiO2:xGeO2 compositions, containing x = 10 and 20, and doped with Er3+, were prepared by a simple sol-gel route. Homogeneous and transparent gels were synthesized and xerogels were obtained by gel annealing from 700 ºC to 1100 ºC. Films exhibiting high transmittance in the visible and near infrared were deposited by spin-coating techniq
J. Braz. Chem. Soc.. Publicado em: 2015-12
-
15. New Flexible and Transparent Solution-Based Germanium-Sulfide Polymeric Materials
New flexible and transparent materials based on germanium sulfide were obtained using GeCl4 and 1,3-propanedithiol as precursors. These materials have transparency in the ultraviolet-visible (UV-Vis) spectral region (about 70%), thermal stability up to 200 °C and glass transition located at temperatures below 0 °C (-37 °C, -56 °C and -59 °C) as shown by
J. Braz. Chem. Soc.. Publicado em: 2015-05
-
16. Effect of different covering materials used during the pre-harvest stage on the quality and storage life of 'Sultana Seedless' grapes
Covering the grapevine rows to delay the maturity and harvest date became widely practiced in 'Sultana Seedless' vineyards. The research work was conducted to test different cover materials (polypropylene cross-stitch, life pack, mogul and transparent polyethylene) in respect to their effects on grape quality and storability. Harvest was delayed for one mont
Food Sci. Technol. Publicado em: 2014-12
-
17. Heterojunction between Al2O3 and SnO2 thin films for application in transparent FET
Alternative materials for use in electronic devices have grown interest in the past recent years. In this paper, the heterojunction SnO2/Al2O3 is tested concerning its use as a transparent insulating layer for use in FETs. The alumina layer is obtained by thermal annealing of metallic Al layer, deposited by resistive evaporation technique. Combination of und
Mat. Res.. Publicado em: 09/09/2014
-
18. Femtosecond lasers for processing glassy and polymeric materials
Novel materials have been developed to meet the increasing mechanical, electrical and optical properties required for technological applications in different fields of sciences. Among the methods available for modifying and improving materials properties, femtosecond laser processing is a potential approach. Owing to its precise ablation and modification cap
Mat. Res.. Publicado em: 27/09/2013
-
19. Surface modification of recording electrodes
Waterborne Polyurethanes (PUs) are a family of polymers that contains urethane linkages synthesized in an aqueous environment and are thus free of organic solvents. Recently, waterborne PUs have been extensively studied for biomedical applications because of their biocompatibility. The present work investigates the following: (1) the impact on electrical per
Polímeros. Publicado em: 2013
-
20. CONTRIBUIÇÃO TERMO-ENERGÉTICA DOS FECHAMENTOS TRANSPARENTES EM EDIFÍCIOS COMERCIAIS CLIMATIZADOS ARTIFICALMENTE EM SANTA MARIA-RS / THERMAL ENERGY CONTRIBUTION TO TRANSPARENT CLOSURE IN ARTIFICIALLY CONDITIONED COMMERCIAL BUILDINGS IN SANTA MARIA-RS
This paper analyzes the influence of the penetration of solar radiation through the transparent closure in consumption of energy for conditioning of the office buildings in the region of Santa Maria-RS, located in the bioclimatic Brazilian zone 2. To do this, simulations were performed in the computational program Design Builder, in a typical office environm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
-
21. Biodegradação de polietileno tereftalato (PET) por fungos ligninoliticos / Biodegradation of polyethylene tereftalate by ligninolytic fungi
In 1977, polyethylene terephthalate (PET), a plastic derived from petroleum, started to be used as raw material for packaging material and engineering plastics. However, under an environmental point of view, the use of plastics is considered problematic because of their high durability and high volume when present in domestic and industrial solid wastes. Thi
Publicado em: 2009
-
22. Perfil morfofuncional de pacientes com retinopatia diabética som baixa acuidade visual severa em hospital público de referência em diabetes no Brasil
Objective: To demonstrate the morpho-functional profile of the evaluation of patients with diabetic retinopathy without low severe visual acuity in a public hospital of reference in endocrinology, determining in this sample, the relation between the time of diabetes, age and visual acuity with the retinal thickness measured by the optical Coherence tomograph
Publicado em: 2008
-
23. Effect of cutting speed and cutting fluid on the BUE geometry of a SAE 12L14 free machining steel
A well known phenomenon, the "built-up edge - BUE", occurs at the chip/tool interface when multiphase materials are machined at low cutting speeds. Under high compressive stresses, seizure prevents the material from sliding over the tool’s rake face. Although many reports have been published on the subject, studies of the BUE phenomenon have been marked by
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-06
-
24. CaracterizaÃÃo Ãptica de materiais nanoestruturados por tÃcnicas de geraÃÃo de segundo e terceiro harmÃnico
This work is dedicated to the optical characterization of nanostructured materials that are of interest for non-linear optics, optoelectronics and nanophotonics. The hyper- Rayleigh scattering (HRS) technique and the third harmonic generation (THG) technique were used. The materials investigated were a glass-ceramics containing sodium niobate (NaNbO3) nanocr
Publicado em: 2007