Nanoribbons
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. A Review of Using Conductive Composite Materials in Solving Lightening Strike and Ice Accumulation Problems in Aviation
ABSTRACT: There are many problems facing aircraft in the air during flight, such as lightning strikes and ice accumulation on aircraft surfaces. These problems usually reduce aircraft efficiency and lead to serious accidents and fatalities. However, the current protection systems used to solve these problems of aircraft represent excessive energy usage, a ha
J. Aerosp. Technol. Manag.. Publicado em: 28/03/2019
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2. All-Optical Logic Gates Devices based on SPP Coupling between Graphene Sheets
Abstract The aim of this work is to propose all-optical logic gates based on surface plasmon polaritons (SPP's) coupling among spatially separated graphene sheets. This model consists of graphene nanoribbons embedded in silica (SiO2) substrate place in a distance such that allow an efficient coupling between the plasmonic modes of the waveguides. It was nume
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-06
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3. 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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4. Síntese e caracterização de nanoestruturas peptídicas: estudos espectroscópicos e aplicações / Synthesis and characterization of peptide nanostructures: spectroscopic studies and applications
The study had as aimed the development of nanostructured materials based on processes of molecular self-assembly of peptide compounds in order to obtain systems of great structural versatility seeking possible applications related to bionanotechnology. In this regard, peptide sequences based on linear and cyclic precursors were synthesized by solid-phase met
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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5. Aspectos eletrônicos e estruturais do grafeno e derivados:: um estudo teórico-experimental
In this work we study the electronic and structural properties of graphene and graphene based materials by means of experimental and theoretical techniques. By means of ab-initio calculations using the Density Funcional Theory (DFT), we study the effect of pressure on graphene multi-layers. We look for an explanation for experimental results on the charge in
Publicado em: 2010
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6. Efeitos da modulação de interferência quântica nas propriedades de transporte eletrônico em nanofitas armchair de Grafeno: Pseudo-spintrônica e análogo relativístico de Klein / Modulation effects of quantum interference in the electronic transport properties of armchair graphene nanoribbons: Pseudo-spintronics and Kleins similar relativistic
No presente trabalho, temos estudado o transporte eletrônico quântico em fitas de grafeno com bordas tipo armchair (FGA). Estas fitas são caracterizadas por apresentar um comportamento semicondutor ou metálico segum a largura que adote. A presença de uma barreira de potencial na FGA gera um deslocamento da estrutura de banda na região do potencial, pos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/11/2009
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7. Propriedades estruturais e vibracionais de nanotubos e nanofitas de titanato. / Structural and vibrational properties of the titanate nanotubes e nanoribbons
Este trabalho relata o estudo das propriedades estruturais, morfolÃgicas e vibracionais dos nanotubos e das nanofitas de titanato obtidos a partir do tratamento hidrotÃrmico de TiO2 em soluÃÃo aquosa de NaOH. As propriedades fÃsicas destas nanoestruturas, como preparadas e tratadas termicamente, sÃo discutidas e comparadas com seus similares sÃlidos e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/11/2009
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8. Structural, morphological and vibrational properties of titanate nanotubes and nanoribbons
Este trabalho relata o estudo das propriedades estruturais, morfológicas e vibracionais dos nanotubos e das nanofitas de titanato obtidos a partir de estruturas bidimensionais por meio de tratamento hidrotérmico do TiO2 em solução aquosa de NaOH. As propriedades físicas destas nanoestruturas, como preparadas e tratadas termicamente, são discutidas e co
Journal of the Brazilian Chemical Society. Publicado em: 2009
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9. Defeitos em nanofitas de Grafeno zigzag / Defects in zigzag graphene nanofibres
Graphene and graphene nanoribbons have been attracting a lot of interest from the scientific community because of their novel properties. In this work, a systematic research has been done on the stability and energetics of divacancy, vacancy and Stone-Wales defects in graphene and zigzag graphene nanoribbons. With this goal in mind, ab initio density functio
Publicado em: 2008
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10. Propriedades eletrônicas e estruturais de nanotubos de dióxido de titânio por primeiros princípios
In this work, we perform first-principles calculations based on the Density Functional Theory (DFT) to study structural and electronic properties of TiO2 nanotubes. Firstly, we address structural aspects. For this purpose we consider a model in which the nanotubes are obtained by rolling up layers of anatase TiO2 oriented in the (001) direction. The stabilit
Publicado em: 2007
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11. Síntese e caracterização de nanofitas de óxido de estanho. / Sinthesys and Characterization of Tin Oxide Nanoribbons.
Nanofitas de oxido de estanho foram sintetizadas pelo método de evaporação carbotérmica, o qual consiste no processo de evaporaçãocondensação. Uma mistura de SnO2 com carbono (negro de fumo) é colocada no centro de um forno tipo tubo. O carbono reduz o óxido de estanho, formando SnO vapor que é levado para regiões mais frias do forno formando as
Publicado em: 2004
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12. Dióxido de estanho nanoestruturado: síntese e crescimento de nanocristais e nanofitas
The objectives of this work are to supply a basic background on nanostructured materials and also to report about the obtaining of nanoparticles, mainly, tin dioxide nanocrystalline particles (obtained by using the polymeric precursor method) presenting a high stability against particle growth due to the usage of a metastable solid solution. The synthesis an
Química Nova. Publicado em: 2003-12