In this work we investigated the effects of an electric field on the electronic properties of a corrugate quantum wire system, linked to two two-dimensional (2D) reservoirs. The applied electric field is parallel to the transport direction in the system, and it produces localized Wannier-Stark states. The structure has open cavities (quasi-OD) conn...
Orientador: Dante Homero Mosca Jr / Dissertação (mestrado) - Universidade Federal do Parana / Resumo: principal objetivo deste trabalho e mostrar a viabilidade da fabricação de diferentes tipos de nanoestruturas a base de ligas Co-Fe e Cu utilizando uma técnica eletroquímica. Através do método potenciostático produzimos nanoestruturas magnéticas do...
Nanometric systems have attracted great interest both for basic studies due to quantum effects, and for technological areas due to its potential use in new devices. Among these systems, metal nanowires show a electronic transport characterized by a conductance being an integer multiple of a conductance quanta (G0). The aim of this work is the const...
Nanometer-sized particles (1-100 nm) have attracted great interest since their high surface-to-volume ratio may lead to novel physical and chemical attributes. In particular, they can be used as building blocks to produce ideal nanostructured solids (cluster-assembled materials ? CAMs), which involves three steps: synthesis, characterization of ind...
Tese (doutorado) - Universidade Federal do Parana
Orientador: Carlos Maurício Lepienski / Tese (doutorado) - Universidade Federal do Paraná / Resumo: Neste trabalho são desenvolvidos dois temas ligados a área de propriedades mecânicas de superfícies. Apresenta-se um novo método para o calculo da dureza e do modulo de elasticidade, a partir dos ensaios realizados em um nanoindentador, baseando-se n...
In this work we discuss issues related to two different methods to obtain epitaxially grown semiconductor nanostructures. The samples were grown by Chemical Beam Epitaxy (CBE) and characterized by High Resolution Transmission Electron Microscopy (HRTEM), Atomic Force Microscopy (AFM) and Reflection High-Energy Electron Diffraction (RHEED). In the f...
The subject of this thesis covers the synthesis and growth of indium, tin and zinc oxide nanostructures by thermal evaporation and hydrothermal synthesis and the fabrication and testing of gas sensors and ultraviolet photodetectors based on these nanosized structures. For both chemical and physical routes, the influence of processing conditions ove...
The subject of this thesis covers the synthesis and growth of indium, tin and zinc oxide nanostructures by thermal evaporation and hydrothermal synthesis and the fabrication and testing of gas sensors and ultraviolet photodetectors based on these nanosized structures. For both chemical and physical routes, the influence of processing conditions ove...
The subject of this thesis covers the synthesis and growth of indium, tin and zinc oxide nanostructures by thermal evaporation and hydrothermal synthesis and the fabrication and testing of gas sensors and ultraviolet photodetectors based on these nanosized structures. For both chemical and physical routes, the influence of processing conditions ove...
