Thin Films
Mostrando 25-36 de 594 artigos, teses e dissertações.
-
25. Development and characterization of gas sensors using thin films of polyaniline as active layer
ABSTRACT This work aimed at the development and characterization of gas sensing devices using thin films of polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity to gases, low response time and stability, ease of synthesis and low cost. The sensor wa
Matéria (Rio J.). Publicado em: 06/12/2018
-
26. Commitment Between Roughness and Crystallite Size in the Vanadium Oxide Thin Film opto-electrochemical Properties
The V2O5 thin films has been widely studied because it has application as ionic host in electrochromic and lithium-ion batteries, two technologies that have an intimate connection with sustainability as substitutes for fossil energies and as agents for improving energy efficiency. In electrochromic technology, V2O5 is applied as a passive electrode due to it
Mat. Res.. Publicado em: 01/11/2018
-
27. Physical Properties of Sputtered Indium-doped ZnO Films Deposited on Flexible Transparent Substrates
Indium-doped zinc oxide (IZO) polycrystalline thin films were grown on polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and as reference on 7059 Corning glass substrates at room temperature by radio frequency magnetron sputtering from a target prepared with a mixture of ZnO and In2O3 powders. The structural, optical, and electrical propertie
Mat. Res.. Publicado em: 06/09/2018
-
28. Ga Dopant Induced Band Gap Broadening and Conductivity Enhancement in Spray Pyrolysed Zn0.85Ca0.15O thin Films
Ga doped Zn0.85Ca0.15O thin films were prepared by spray pyrolysis method and studied the impact of Ga doping concentration on the physical properties of these films. XRD analysis confirmed the structural purity and polycrystalline nature of the films and composition analysis verified the incorporation of dopants in the structures. Optical transmission in th
Mat. Res.. Publicado em: 03/09/2018
-
29. Analysis of substrate coverage of hybrid halide perovskite thin films deposited on glass
ABSTRACT In this work we have studied coverage characteristics of organo-metal lead halide perovskite thin films deposited through the spin-coating technique onto glass substrates that were subjected to different predeposition treatments. Samples were deposited at room temperature using different spinning speeds and two different solvents, namely, dimethylfo
Matéria (Rio J.). Publicado em: 19/07/2018
-
30. Synthesis and characterization of nanostructured TiO2 and TiO2/W thin films deposited by co-sputtering
ABSTRACT Nanostructured TiO2 and TiO2/W thin films were deposited on Corning glass substrates by RF and DC magnetron co-sputtering at room temperature, using three targets of TiO, Ti and W. After deposition, samples were subjected to an annealing treatment in air at 500 °C for 3 hrs. The effect of the annealing treatment and tungsten addition to the TiO2 ma
Matéria (Rio J.). Publicado em: 19/07/2018
-
31. Estudio de la microestructura de un cordón de soldadura de un acero P91 mediante microscopía electrónica de transmisión
ABSTRACT In the present work the microstructural characterization of a single-pass weld of 9Cr1MoVNb P91 steel performed by the flux-cored arc welding (FCAW) process in the “as welding” condition has been carried out by means of transmission electron microscopy. P91 steel offers a good weldability, but the mechanical properties of the welded joints are f
Matéria (Rio J.). Publicado em: 19/07/2018
-
32. Effects of Potential Deposition on the Parameters of ZnO dye-sensitized Solar Cells
Dye-sensitized solar cells (DSSCs) are a feasible option for photovoltaic energy. Zinc oxide is an n-type semiconductor employed as photoanode on DSSCs. ZnO thin films were electrodeposited to study the effects of different potentials applied during deposition. SEM images, XRD and UV-Vis analysis were conducted to reveal the morphologic, structural and optic
Mat. Res.. Publicado em: 18/06/2018
-
33. Evaluation of Carbon thin Films Using Raman Spectroscopy
Carbon thin films deposited by the magnetron sputtering technique were evaluated by Raman spectroscopy to study the influence on their crystallinity caused by different parameters like the carbon deposition time, the different buffer-layers and substrates employed and also two distinct heat treatments. The present results showed that the choice of these para
Mat. Res.. Publicado em: 07/06/2018
-
34. Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements
We have studied the thickness and quench-rate dependent internal friction of amorphous selenium (a-Se) thin films deposited at room temperature. The internal friction of a-Se films exhibit a temperature independent plateau below 1 K followed by a broad maximum at 10 K. The plateau, which is seen in almost all amorphous solids, is caused by dissipation by two
Mat. Res.. Publicado em: 07/06/2018
-
35. Mechanical Loss Angle Measurement for Stressed thin Film Using Cantilever Ring-Down Method
Mechanical loss of the coating materials, and hence thermal noise from the mirror coatings, is a limiting factor for the sensitivity of the laser interferometer gravitational waves detector at its most sensitive frequency range. Mechanical loss of the thin films are often measured using the cantilever ring-down method. But when the thin film is under stress,
Mat. Res.. Publicado em: 28/05/2018
-
36. An Overview of Research into Low Internal Friction Optical Coatings by the Gravitational Wave Detection Community
The direct detection of gravitational waves by ground-based interferometric gravitational wave detectors in recent years has opened a new window of the universe, allowing the astrophysical observations of previously unexplored phenomena, such as the collisions of black holes and neutron stars. However, small thermodynamic fluctuations of the density of the t
Mat. Res.. Publicado em: 24/05/2018