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Preparation and characterization of metal-semiconductor nanocomposites by self-assembly of niobium and gold spheres

Grant number: 08/09049-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2008
Effective date (End): November 30, 2010
Field of knowledge:Engineering - Mechanical Engineering
Principal Investigator:Djalma de Albuquerque Barros Filho
Grantee:Vanessa Seriacopi
Home Institution: Coordenadoria de Pesquisa. Universidade Bandeirantes (UNIBAN). São Paulo , SP, Brazil

Abstract

The main goal of this research project consists on the generation of nanocomposites formed by gold (Au) and niobium (Nb) spherical particles self-assembled by conventional techniques like controlled evaporation of solvent and sedimentation. The spheres diameters are below 500nm whose voids will be filled by inorganic precursors like tetraethylorthosilicate (TEOS) and tetraethylorthotitanate (TEOTit) in such a way that it will be created a semiconductor-metal interface to be analyzed by different techniques like: electronic microscopic, X-ray diffraction,AC magnetic susceptibility, etc. New self-assembled arrays can be obtained using a metallic template replacing the conventional semiconductor and polymeric colloidal particles applied in the nanoscience field. Some trends must be highlighted as the improvement of new functional devices with mechanical strength, thermal and electrical conductivity, nanomagnetism, etc. Therefore, the return of this project will be important for scientific research and technological application. (AU)