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Estudo teórico da influência de um meio solvente na interação de aminoácidos com um nanotubo de carbono
(Universidade Federal de Santa Maria, 2010-09-24)
In this work we use the Density Functional Theory (DFT) to analyze the influence of a water environment in the interaction between amino acids and a semiconductor
carbon nanotube (CNT). To the study of the interaction in ...
Classificação espectral e determinação de distância de estrelas em dez regiões HII do hemisfério sul
(Universidade Federal de Santa Maria, 2009-03-11)
In order to determine distances of Southern Galactic HII regions, we carried out spectroscopic and photometric observations of the stellar content of a set of these objects. We have chosen objects only visible in the South ...
Estudo da transição cristalográfica em filme fino de VO2 por difração de raios-x
(Universidade Federal de Santa Maria, 2011-03-28)
In one sample, X-Ray diffractions have been measured as a function of the temperature, in
order to follow the crystallographic transition experienced by VO2 near 68ºC. The results have
been analysed with the aide of a ...
Estudo teórico do comportamento magnético do composto Y0.8Gd0.2Co3
(Universidade Federal de Santa Maria, 2004-06-08)
The itinerant ferromagnetic Y Co3, Tc = 301K, presents a crystalline structure with a hexagonal unit cell. It has thirty six atoms that are distributed in five different crystallographic sites, three for the Co and two for ...
Magnetostricção e ruído Barkhausen em aços elétricos de grão não-orientado
(Universidade Federal de Santa Maria, 2005-12-20)
Non-oriented electrical steels (NO) studied in this work are used in applications that demand isotropy of magnetic properties along the plane of the sheet, which the magnetic field is applied in different angles with respect ...
Estudo computacional da difusão de água em nanotubos de carbono induzida por gradiente de pressão
(Universidade Federal de Santa Maria, 2013-02-08)
In this work we present a computational study of the properties of water transport
across membranes formed of carbon nanotubes (CNT) armchair with different diameters,
when subjected to pressure gradients 80-400 MPa. This ...
Crescimento de filmes finos de ni81fe19 para aplicações envolvendo magnetorresistência anisotrópica
(Universidade Federal de Santa Maria, 2011-05-13)
Anisotropic magnetoresistance (AMR) consists in the change of the resistivity of a ferromagnetic metal as a function of the angle between the current and the magnetization, what makes AMR-based sensors promising to measure ...
Estudo computacional da condutividade térmica de nanofios de Si
(Universidade Federal de Santa Maria, 2014-05-15)
In this work the thermal conductivity κ of Si nanowires using molecular dynamics simulations is calculated using the Müller-Plathe method. We show that at 500 K, κ for crystaline Si is 121; 557 W/mK, while for nanowires, ...
Magnetoimpedância em Filmes Finemet/Metal/Finemet
(Universidade Federal de Santa Maria, 2004-10-01)
The magnetoimpedance effect (MI) in sandwiched thin films of the FeCuNbSiB/Cu produced by Magnetron Sputtering is studied using HP4396B impedance analyzer in the
frequency range 100kHz-1,8GHz. The samples were produced ...
Estudo por dinâmica molecular da transição de fase estrutural de nanotubos de carbono por indução de pressão: um método ab initio
(Universidade Federal de Santa Maria, 2012-10-26)
This work aims to study the computational training of new phases of materials based on
carbon nanotubes using as precursor materials. The procedure consists in simulate bundle
formed by carbon nanotubes (NTC) (5, 5), (6, ...