Carbon Doping
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Mechanical properties and morphological characteristics of ARALL reinforced with TRGO doped epoxy resin
ABSTRACT Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mech
Matéria (Rio J.). Publicado em: 06/12/2018
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2. Mechanical properties and morphological characteristics of ARALL reinforced with TRGO doped epoxy resin
ABSTRACT Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mech
Matéria (Rio J.). Publicado em: 06/12/2018
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3. Effect of Fe3+ Doping in the Photocatalytic Properties of BaSnO3 Perovskite
In the last ten years, stannates with perovskite structure have been tested as photocatalysts. In spite of the ability of perovskite materials to accommodate different cations in its structure, evaluation of doped stannates is not a common task in the photocatalysis area. In this work, Fe3+ doped BaSnO3 was synthesized by the modified Pechini method, with ca
Mat. Res.. Publicado em: 10/08/2017
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4. Boron Doped Ultrananocrystalline Diamond Films on Porous Silicon: Morphological, Structural and Electrochemical Characterizations
Boron doped ultrananocrystalline diamond (BDUND) films were grown and characterized on porous silicon (PS) substrates. PS samples were prepared from n-type monocrystalline silicon wafers (100) with 1-20 Ω.cm of resistivity, by electrochemical etching, using HF-acetonitrile solution as electrolyte. BDUND films were grown by Hot Filament Chemical Vapor Deposi
Mat. Res.. Publicado em: 24/11/2015
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5. Biomimetic Sensor for Detection of Hydrochlorothiazide Employing Amperometric Detection and Chemometrics for Application in Doping in Sports
This work describes a simple and cost-effective method for quantitative determination of hydrochlorothiazide using biomimetic sensor based on a carbon paste modified with hemin (biomimetic catalyst of the P450 enzyme). The sensor was evaluated using cyclic voltammetry and amperometry for its electrochemical characterization and quantification, respectively.
J. Braz. Chem. Soc.. Publicado em: 2015-10
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6. PHOSPHORUS INCORPORATION INTO MULTIWALLED CARBON NANOTUBES / INCORPORAÇÃO DE FÓSFORO EM NANOTUBOS DE CARBONO DE PAREDES MÚLTIPLAS
The thesis addresses the incorporation of phosphorus atoms into the structure of multi-walled carbon nanotubes (MWCNTs) grown by the Spray Pyrolysis method. To this end, the concentration of ferrocene in the precursor was fixed in 2,0 wt %, while the concentration of triphenylphosphine (Ph3P) was varied from 0,15 to 0,65 wt %. Scanning and transmission elect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
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7. Conformational analysis and electronic structure of chiral carbon and carbon nitride nanotubes
Geometry and electronic structure of chiral carbon and carbon nitride (CNx) nanotubes were investigated through quantum chemical methods. Finite nanotubes with diameters ranging from 5 to 10 Å and containing up to 500 atoms were considered. CNx structures were built through random substitution of carbon atoms by nitrogen. The molecules were fully optimized
Materials Research. Publicado em: 30/09/2011
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8. Estudo da dopagem em nanotubos de carbono por espectroscopia Raman ressonante.
Doping of single wall carbon nanotubes with boron, nitrogen, phosphorous and sulfur was studied by resonance Raman spectroscopy. The doping atoms were inserted in the tube walls during synthesis, by using chemical vapor deposition, laser ablation and arc discharge methods. The analysis of the Raman spectra shows that the insertion of dopants generates tubes
Publicado em: 2009
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9. Estudo e aplicação das propriedades elétricas, térmicas e mecânicas de materiais amorfos piezoresistivos em transdutores de pressão. / Study and application of eletrical properties, thermal and mechanical of amorphus matherials in piezoresistive.
This tesis presents the piezoresistivity theoretical and experimental study for two materials with amorphous structure. The first material is the Diamond Like Carbon and the other is the Indium Tin Oxide. The work includes the bibliographic study, theoretical and practical design of structures for testing individual and piezoresistors configured in bridge, i
Publicado em: 2009
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10. PRODUÇÃO DE PIGMENTOS INORGÂNICOS A BASE DE ZrSiO4 COM INCORPORAÇÃO DE PASTA ELETROLÍTICA DE PILHAS / PREPARATION OF INORGANIC PIGMENTS BASED ON THE ZrSiO4 OXIDE FROM A MIXTURE OF AN ELECTROLYTIC-PASTE WASTE OF ALKALINE BATTERIES AND ZrSiO4
Throughout the times, new pigment systems have been gradually developed. In the nowadays, the development of ceramic pigments represents a part of the Materials Science, where there is a lack of concepts, roles and strategies, which in goal allows the developing of new rotes of preparing or pigments, in both scientific and technological areas. This work deal
Publicado em: 2009
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11. Espectroscopia Raman ressonante em nanotubos de carbono funcionalizados. / Resonant Raman Spectroscopy in carbon nanotubes functionalized
Esta tese consiste no estudo do processo de sÃntese e funcionalizaÃÃo de nanotubos de carbono. A sÃntese dos nanotubos de carbono foi realizada usando a tÃcnica de deposiÃÃo quÃmica a partir da fase vapor (CVD). Foram sintetizados Nanotubos de parede simples (SWNTs) e mÃltipas (MWNTs) . A diferenÃa bÃsica das metodologias usadas para preparar as a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/06/2008
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12. Estudo de Impurezas de Carbono em Nanoestruturas de BN
In this work, we performed an analysis of the structural and electronic stability of nanostructures of Boron Nitride (BN), such as layers, tubes and cones, when doped with Carbon, through first-principles calculations as implemented in code SIESTA. We found that substitutional doping of Carbon for either a single Boron or a single Nitrogen atom produces sign
Publicado em: 2008