Semiconductor Electrode
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Dendritic Gold Nanoparticles Towards Transparent and Electroactive Electrodes
Abstract: The combination of UV-visible absorption and electrochemical experiments (spectroelectrochemistry) enables to obtain highly specific spectroscopic information (in situ and operando) from modified surfaces. However, such application can be limited by the self-absorbance, for example, when metallic nanoparticles are present on modified surfaces. Indi
An. Acad. Bras. Ciênc.. Publicado em: 28/11/2019
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2. Application of Zinc Oxide in Hybrid Solar Cells Using a P3HT and P3OT Polymer Junction as Charge Carrier
Hybrid solar cells show an increasing number in researches due to its low cost and easy of production. They are composed by and organic material and a semiconductor oxide. The aim of this paper was to synthesis and characterize zinc oxide by coprecipitation and apply it in a hybrid solar cell that uses a P3HT/P3OT copolymer as charge carrier. The cell was as
Mat. Res.. Publicado em: 01/07/2019
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3. Semiconductor Nanocrystals-Reduced Graphene Composites for the Electrochemical Detection of Carbendazim
A new nanocomposite based on ZnCdTe semiconductor nanocrystals (NCs) synthesized in situ on reduced graphene oxide (rGO) was obtained. The heterostructure was characterized using UV-Vis emission and absorption spectroscopies, which provided evidences of the growth of the nanocrystals onto the rGO matrix. To evaluate the electrochemical performance, carbon pa
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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4. Performance Evaluation of Titanate Nanotubes and Nanoribbons Deposited by Electrophoresis in Photoelectrodes of Dye-Sensitized Solar Cells
Nanoparticles of TiO2 have been the main semiconductor applied in Dye-sensitized solar cells (DSSCs). In this work, titanate nanotubes (NaTiNT) and nanoribbons, were obtained by the hydrothermal method from TiO2 anatase. These materials were deposited on conductive substrate by electrophoresis, with and without thermal treatment, sensitized by ruthenium-base
Mat. Res.. Publicado em: 28/05/2018
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5. Electrocatalytic Oxidation Removal of Phenol from Aqueous Solution with Metal Oxides Doped Carbon Aerogel
Metal oxides (manganese oxide, MnO, manganese dioxide, MnO2, copper oxide, CuO, zinc oxide, ZnO and nickel oxide, NiO) doped carbon aerogel (CA) were prepared and used as catalysts in heterogeneous oxidation of phenol from aqueous solution in a three-dimensional (3D) electrode reactor. Textural characterization of metal oxides doped CA showed that the metal
J. Braz. Chem. Soc.. Publicado em: 2018-04
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6. Eletrodos porosos contendo TiO2 e WO3 : propriedades eletroquímicas e atividade fotocatalítica para remoção do corante Rodamina 6G e do hormônio 17 a-etinilestradiol em solução aquosa / Porous electrodes containig TiO2 and WO3 : eletroctrochemical properties and photocatalytic activity for removal of Rodhamine 6G dye and 17 alfa -ethynylestradiol
Porous films electrodes containing TiO2 and WO3 were deposited on SnO2:F (FTO) conducting glass from aqueous suspensions with TiO2 Degussa P25®, WO3 precursors and polyethylene glycol, followed by heating (450°C, 30 min). The maximum absorption was respectively observed at 390 and 480 nm for TiO2 and WO3 samples; intermediate values were obtained for the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2012
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7. Desenvolvimento de processos de eletrodos de porta (TaN e TiN) para dispositivos MOS / Process development of gate electrodes (TiN and TaN) for MOS devices
Tantalum nitride (TaN) and titanium nitride (TiN) films have been obtained by DC sputtering, using different nitrogen flow (10 - 80 sccm) and power (500 - 1500 W), in a nitrogen (N2)/argon (Ar) ambient on Si (100) substrates. The N2/Ar ratio in gas mixture and power effects on structural and electrical properties of TaN and TiN films were investigated by sca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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8. Preparação e caracterização de eletrodos de titanatos para aplicação em conversão de energia solar / Preparation and characterization of titanate electrodes for solar energy conversion
Thin porous films electrodes of titanates H2Ti2O5, H2Ti4O9 and H2Ti8O17 were prepared and investigated. The titanates were synthesized through solid state reactions by heating mixtures of TiO2 and K2CO3; after HCl treatment for ion exchange, the samples were rinsed with water. X-ray diffraction and scanning electron microscopy indicated that, depending on th
Publicado em: 2009
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9. Isolantes de porta com altas constantes dieletricas (High K) para tecnologia MOS / High K gate insulators for MOS technology
High k insulators for the next generation (sub-32 nm CMOS (complementary metaloxide-semiconductor) technology), such as titanium oxide (TiOx), titanium oxynitride (TiOxNy), titanium-aluminum oxynitride (AlxTiwOyNz), titanium-aluminum nitride (AlxTiwNz) and titanium-aluminum oxide (AlxTiwOy), have been obtained by Ti or Ti/Al e-beam evaporation, with addition
Publicado em: 2008
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10. Morphological study of polycrystalline SiGe alloy deposited by vertical LPCVD
As device dimensions shrink to the deep-submicron scale, new challenges arises from the very small scale used and even poly crystalline silicon (poly-Si) presents problems as gate electrode. The use of SiGe as gate material can present many advantages over the poly-Si, as it leads to a lower boron penetration and gate depletion. In this paper authors present
Brazilian Journal of Physics. Publicado em: 2006-06
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11. Construção e caracterização de fotodetetores metal-semicondutor-metal (MSM). / Construction and characterization of metal-semiconductor-metal (MSM) photodetectors.
The goal of this work was the fabrication of Metal-Semiconductor-Metal (MSM) photodetectors with the following characteristics: dark current of about 1 nA, responsivity of about 0.1 A/W and dark/photocurrent ratio of at least 10. These values ensure that the photodetectors have enough sensitivity to be used in integrated optic sensors. All materials used in
Publicado em: 2006
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12. Propriedades fotoeletroquimicas do polipirrol-dodecilsulfato
The photoelectrochemical properties of polypyrrole, PPy, doped with a surfactant are systematically examined in this work. Dodecylsulfate, DS, makes possible the synthesis in an aqueous medium yielding flexible films with good electrochemical, mechanical and electrochromic stabilities. The interaction of light with the surface of a reduced PPy-DS film (p-typ
Publicado em: 1998