Electronics Properties
Mostrando 1-12 de 32 artigos, teses e dissertações.
-
1. Estudo das propriedades do Diodo Emissor de Luz (LED) para a determinação da constante de Planck numa maquete automatizada com o auxílio da plataforma Arduíno
Resumo No presente artigo, apresenta-se o método experimental de determinação da constante de Planck, uma das constantes físicas fundamentais, através do estudo das propriedades quânticas e ondulatórias do diodo emissor de luz (LED) numa maquete experimental automatizada, que contém um circuito eletrônico ligado a um computador utilizando o protocol
Rev. Bras. Ensino Fís.. Publicado em: 09/09/2019
-
2. Dielectric and electrical properties of a mullite/glass composite from a kaolinite clay/mica-rich kaolin waste mixture
Resumo Um compósito mulita/fase vítrea foi preparado por sinterização reativa de uma mistura argila caulinítica/resíduo de caulim rico em mica com 25% em massa de resíduo. A composição de fase, microestrutura, propriedades dielétricas e elétricas do compósito sinterizado a 1400 °C foram avaliadas por difração de raios X, microscopia eletrônic
Cerâmica. Publicado em: 2019-01
-
3. PONTOS QUÂNTICOS AMBIENTALMENTE AMIGÁVEIS: DESTAQUE PARA O ÓXIDO DE ZINCO
Semiconductor nanocrystals with sizes in the quantum confinement regime (2-10 nm) present special physical and chemical properties. Additionally, environment-friendly quantum dots (QDs), as zinc oxide and zinc sulfide, offer many practical usages. Herein the ZnO semiconductor nanocrystals properties will be preferentially explored, such as its luminescence,
Quím. Nova. Publicado em: 2017-10
-
4. Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
Individual carbon nanotubes (CNTs) exhibit excellent mechanical, electrical and thermal properties, leading to development of a new generation of advanced lightweight materials and spacecraft electronics substituting the electronics based on silicon. The direct assembly of CNTs into macroscopic fibers or sheets has been a way to overcome their dispersion and
Mat. Res.. Publicado em: 18/09/2017
-
5. Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems
ABSTRACT Epoxy resin is one of the most important polymeric matrixes for diverse uses, such as aeronautical, mobile, electronics and others. Providing a material capable of self-healing microcracks will allow it to have a more reliable and longer use. In order to study this new property of self-healing to an epoxy resin, a Differential Scanning Calorimetry (
Matéria (Rio J.). Publicado em: 20/07/2017
-
6. Single Flexible Nanofiber to Simultaneously Realize Electricity-Magnetism Bifunctionality
In order to develop new-typed multifunctional composite nanofibers, PANI/Fe3O4/PVP flexible bifunctional composite nanofibers with simultaneous electrical conduction and magnetism have been successfully fabricated via a facile electrospinning technology. Polyvinyl pyrrolidone (PVP) is used as a matrix to construct composite nanofibers containing different am
Mat. Res.. Publicado em: 05/02/2016
-
7. Effects from Gold Electrodes on the Electron-Phonon Coupling of Poly(p-phenylenevinylene) Films
Interface effects between metal electrodes and organic films are crucial for the overall performance of organic electronics devices. We investigate effects from gold electrodes deposited on spin-coated films of poly(p-phenylene vinylene) (PPV). While a thin Au layer (16 nm) did not affect the absorption and emission spectra of PPV, a 64 nm thick Au layer ind
J. Braz. Chem. Soc.. Publicado em: 2015-09
-
8. Estudo das propriedades elétricas de células eletroquímicas emissoras de luz de derivados de polifluoreno / Electric properties study of polymer light-emitting electrochemical cells based on polyfluorene derivatives
Polymer light emitting electrochemical cells, PLECs, are organic electronic devices that have attracted commercial interest because they operate at low voltage and exhibit high performance without the need of specific electrodes such as indium tin oxide (ITO), calcium and others. This feature provides low cost of fabrication and exible devices. The charge in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2011
-
9. RESÍDUOS DE BIFENILOS POLICLORADOS EM ARROZ E FEIJÃO DO ESTADO DO RIO GRANDE DO SUL / RESIDUES OF POLYCHLORINATED BIPHENYL IN RICE AND BEANS IN THE STATE OF RIO GRANDE DO SUL
Polychlorinated biphenyls (PCBs) were commercially produced between 1929 and the mid 1980s with industrial purposes. The same properties that interested industrially, as chemical inertness, high dielectric constant, resistance to burning; were also responsible for the spreading of the PCBs in all of the environmental compartments, mainly due to the inadequat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/09/2011
-
10. Estudo das propriedades eletro ópticas de filmes finos de nitreto de índio nanoestruturado e de sua aplicação em dispositivos fotônicos e opto eletrônicos. / Study of electro optic properties of nanostructured indium nitride thin films and aplication in opto electronics and photonics devices.
O nitreto de índio (InN) e seus derivados (como o oxi-nitreto de índio) são materiais com alta potencialidade de aplicações em dispositivos optoeletrônicos devido às suas propriedades ópticas e eletrônicas. Para o InN foi obtido originalmente um band gap em torno de 1,9 eV e, apesar deste valor aparecer com freqüência na literatura, têm se obtido
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
-
11. Estudo da viabilidade para fabricação de fibra óptica polimérica (FOP) por extrusão vertical / Study of the feasibility on manufacturing polymeric optical fiber (POF) by vertical extrusion
Polymeric optical fibers (POF) presents some advantages compared to the glass optical fibers as flexibility, higher numerical aperture (NA), ease in handling and connecting due to their larger diameter and lower cost manufacturing and installation. However, due to their larger transmission losses compared to the main applications of glass fibers, POF are lim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2011
-
12. Propriedades optoeletrônicas de interfaces híbridas metal/semicondutor orgânico preparadas por deposição assistida por feixe de íons (IBAD) / Optoelectronic properties of interfaces hybrid metal / organic semiconductor prepared by ion beam assisted deposition (IBAD)
In this work, optoelectronic properties from organic light emitting devices (OLEDs), based on conjugated polymers with metallic cathode, which were deposited by ion beam assisted deposition technique (IBAD) were studied. The main objective of this work is to produce a hybrid non abrupt metal/polymer interface and to study its effects on electron injection. T
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/07/2011