Thin Filmes Growth
Mostrando 1-12 de 32 artigos, teses e dissertações.
-
1. Crescimento, estrutura e magnetismo de filmes ultrafinos de Ni depositados sobre Pd(100)
In this work, the growth mode, the structure and the magnetic behavior of ultrathin Ni films epitaxially grown over Pd(100) were investigated using in-situ experimental techniques ass RHEED, LEED, AES, MBE and MOKE, and ex-situ VSM. The objective was to study the influence of the stress induced by the lattice parameter mismatch of the materials (10,4%), the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
-
2. Preparação e caracterização eletroquímica de filmes finos de nanotubos de carbono depositados sobre ITO / Preparation and electrochemical characterization of thin films of carbon nanotubes deposited on ITO
In this work were carried out some studies on electrochemical properties of carbon nanotubes (CNT) thin films deposited on ITO (Indium Tin Oxide) electrodes by electrophoretic deposition (EPD). Capacitance and electrochemical area measurements were made with films of three types of nanotubes with different dimensions and previous treatments. All measurements
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
-
3. Influência dos polieletrólitos na resposta eletroquímica de filmes automontados contendo nanotubos de carbono para aplicação em nanomedicina / Influence the polyelectrolytes on the electrochemical response of layer-by-layer films containing carbon nanotubes for applications in nanomedicine
Carbon Nanotubes (CNTs) are cylindrical carbon nanostructures exhibiting excellent electrical, thermal, optical and mechanical properties. The immobilization of CNTs in nanostructured thin films in conjunction with polymers using the Layer-by-Layer (LbL) technique provides a new alternative for development of nanocomposites to be used as sensors and biosenso
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
-
4. CRESCIMENTO DE FILMES FINOS DE Ni81Fe19 PARA APLICAÇÕES ENVOLVENDO MAGNETORRESISTÊNCIA ANISOTRÓPICA / GROWTH OF THIN FILMS OF Ni81Fe19 TO APLICATIONS ENVOLVING ANISOTROPIC MAGNETORESISTANCE
Magnetorresistência anisotrópica (AMR) consiste na variação da resistividade de um metal ferromagnético como uma função do ângulo entre a corrente e a magnetização, o que faz com que sensores que utilizam este efeito sejam promissores para medidas de posição tanto angulares quanto lineares. Estes dispositivos normalmente possuem a estrutura Ta/Ni
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/05/2011
-
5. Study of growth, optical and morphological properties of Zn(O;OH)S thin films synthesized by CBD method
Neste trabalho, investigamos Zn(O;OH)S como substituto para ao CdS, que é convencionalmente usado como camada tamponante em células solares usando calcopirita. Filmes finos de Zn(O;OH)S foram depositados em banho químico de deposição (CDB), método que utiliza um banho químico contendo tiouréia, acetato de zinco, citrato de sódio e amônio. Filmes fi
Journal of the Brazilian Chemical Society. Publicado em: 2011-12
-
6. Fabricação e caracterização de filmes automontados de PAH/BSA / Fabrication and characterization of LbL films of PAH / BSA
In the last years techniques have been developed for the development of science and technology concerning all science fields, such as physics, chemistry and biology. The study of the protein adsorption processes on the solid surfaces is of great importance in the development of biocompatible materials. The Layer-by-Layer deposition technique, where self-asse
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2010
-
7. Anisotropias magnéticas em filmes finos de Co: Uma análise por magnetometria de torque / Magnetic anisotropies in Co thin films:An analysis by torque magnetometry
By studying the magnetic behavior of materials a very important parameter to be analyzed are the constants of anisotropy. They can be associated with an effective anisotropy energy or to a more specific one as, for example, the magnetocrystalline. During the thin films deposition by magnetron sputtering, an uniaxial effective anisotropy can be induced due to
Publicado em: 2010
-
8. Estudo de propriedades de filmes de interferência crescidos em diferentes temperaturas sobre aços inoxidáveis / Estudo de propriedades de filmes de interferência crescidos em diferentes temperaturas sobre aços inoxidáveis
In this work, the properties of colored interference thin films grown by an electrochemical pulsed current process developed at Fundação Centro Tecnológico de Minas Gerais CETEC, using sulfochromic solution with a low chromium concentration at different temperatures were investigated. The physical, morphological and mechanical characteristics as well as w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/04/2009
-
9. Estudos de dinamica molecular aplicados ao crescimento epitaxial e nanoindexação / Studie pf molecular dynamics applied to the epitaxial growth and nanoindentation
In this work we present two important and current subjects:Metalic thin .lms and nanoindentation. We studied these systems using molecular dynamics with empirical potentials. We showed that it is possible to model the epitaxial growth using a suitable potential and a specific methodology for deposition.Concerning the growth of thin films,we studied three sys
Publicado em: 2009
-
10. Estudos da deposição de filmes de diamante CVD sobre carbeto de tungstênio, com interface controlada de boreto / Studies of the deposition of diamond CVD films on tungsten carbide, boride with interface control
The objective of this work was to obtain adherent diamond films on WC-Co substrate through the hot filament assisted CVD technique, using a boriding process to form an intermediate layer and avoid the diffusion of the cobalt to the substrate surface. The boriding process consists of a reactive thermo diffusion treatment, in which boron atoms are spread in th
Publicado em: 2009
-
11. Filmes de diamante nanocristalino infiltrados em substratos de silício poroso através das técnicas CVD/CVI / Nanocrystalline diamond films infiltrates in porous silicon substrate by CVD/CVI Processes
The growth of nanocrystalline diamond films (NCD) on porous silicon (PS) substrate was studied using high resolution scanning electron microscopy, high resolution X-ray diffraction, X-ray photoelectron spectroscopy and Raman scattering spectroscopy. The NCD/PS films resulted in a composite material, with great potential for electrochemical application, mainl
Publicado em: 2009
-
12. Development of a reactor for growth of diamond tubular films / Desenvolvimento de um reator para o crescimento de filmes diamantiferos tubulares
A hot-filament chemical vapor deposition system was designed and built to grow diamond thin films. This system fed with ethanol highly diluted in hydrogen was employed to deposited diamond layers onto quartz tubes with diameters of 6 mm and length of 10 cm. High uniformity microcrystalline diamond films were obtained thanks the maintenance of the substrate i
Publicado em: 2008