Metallic Nanowires
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. INFLUÊNCIA DA COMPOSIÇÃO DOS NANOFIOS PT-IR/C NA ATIVIDADE CATALÍTICA FRENTE A OXIDAÇÃO ELETROQUÍMICA DE ETANOL EM MEIO ÁCIDO
Carbon-supported platinum-iridium nanowire-shape electrocatalysts containing 20% of metallic loading were synthesized by chemical reduction method using formic acid as a reducing agent and tested towards the oxidation of ethanol in acidic medium. The developed electrocatalysts were synthesized with the following compositions: Pt0.9Ir0.1/C, Pt0.8Ir0.2/C, Pt0.
Quím. Nova. Publicado em: 2020-02
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2. Silicon nanocrystals and zinc oxide nanowires with erbium / Nanocristais de silicio e nanofios de oxido de zinco com erbio
We present a study of erbium luminescence in silicon nanocrystals (nc-Si) and zinc oxide nanowires (nw-ZnO). Silicon nanocrystals are produced by annealing of amorphous sub-oxide thin films (SiOx) prepared by rf-sputtering varying the oxygen and erbium concentration during growth. Erbium is added by partially covering the silicon target surface with small pi
Publicado em: 2009
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3. Nanotecnologia: aspectos gerais e potencial de aplicação em catálise
In recent years nanomaterials, such as metallic nanoparticles, nanowires, nanotapes, nanotubes and nanocomposites, have attracted increasing interest for several technological applications. In catalysis, the great potential of nanomaterials is related to the high catalytic activity exhibited by these materials as a function of the high surface/volume ratio w
Química Nova. Publicado em: 2009
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4. Estudo de dinamica molecular de nanoestruturas organicas e nanofios metalicos / Molecular dynamics study of organic nanostructures and metallic nanowires
Neste trabalho utilizamos métodos de física computacional para descrever o comportamento estrutural de formação de cadeias atômicas lineares suspensas (LACs) (i ) e de uma estrutura orgânica sobre superfície metálica (ii ). Ambos os temas foram desenvolvidos sobre o ponto de vista de física computacional e comparados com resultados experimentais esp
Publicado em: 2007
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5. Structural effects on quantization of metallic nanowires conductance / Efeitos estruturais na quantização da condutancia de nanofios metalicos
O estudo de fios metálicos de tamanho atômico (NF´s) tem atraído grande interesse devido aos novos efeitos químicos e físicos neles observados. Entre esses novos fenômenos podemos destacar a quantização da condutância, efeito que deve ser fundamental no desenho dos novos nanodispositivos eletrônicos. NF´s são usualmente gerados através de um pr
Publicado em: 2007
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6. Estudo da evolução dinamica de nanofios de cobre e ouro / Study of dynamical evolution of cooper and gold
Metallic nanowires have been a subject of study for at least ½fteen years. The interest in these new materials is increasing continuously due to the possibility of using them as metallic contacts in electronic nanodevices. For example, between two tips of very thin nanowires, it is possible to insert small structures, such as carbon buckyballs or small orga
Publicado em: 2006
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7. Fluctuations, classical activation, quantum tunneling, and phase transitions
We study two broad classes of physically dissimilar problems, each corresponding to stochastically driven escape from a potential well. The first class, often used to model noise-induced order parameter reversal, comprises Ginzburg-Landau-type field theories defined on finite intervals, perturbed by thermal or other classical spatiotemporal noise. The second
Brazilian Journal of Physics. Publicado em: 2005-06
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8. The role of carbon contamination in metallic nanowires
Metallic nanowires have attracted much attention in the last years due to new phenomena such as quantum conductance and the existence of unexpected long interatomic distances attaining 0.3-0.5 nm. These large distances represented a challenge for physical interpretation. In this work we present experimental data from high-resolution transmission electron mic
Materials Research. Publicado em: 2004-06
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9. An electromechanical material testing system for in situ electron microscopy and applications
We report the development of a material testing system for in situ electron microscopy (EM) mechanical testing of nanostructures. The testing system consists of an actuator and a load sensor fabricated by means of surface micromachining. This previously undescribed nanoscale material testing system makes possible continuous observation of the specimen deform
National Academy of Sciences.
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10. Conducting nanowires built by controlled self-assembly of amyloid fibers and selective metal deposition
Recent research in the field of nanometer-scale electronics has focused on the operating principles of small-scale devices and schemes to realize useful circuits. In contrast to established “top-down” fabrication techniques, molecular self-assembly is emerging as a “bottom-up” approach for fabricating nanostructured materials. Biological macromolecul
The National Academy of Sciences.