Molecular Electronics
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. 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
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2. Síntese de cristais líquidos derivados do nitroazobenzeno: uma proposta de síntese multi-etapas aplicada às aulas de química orgânica experimental
We describe a synthetic route consisting of five steps from aniline to obtain liquid crystal compounds derived from nitroazobenzene. Syntheses were performed during the second half of the semester in organic chemistry laboratory classes. Students characterized the liquid crystal phase by the standard melting point techniques, differential scanning calorimetr
Quím. Nova. Publicado em: 2014
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3. The use of computational chemistry in the studies of chemical processes involved in electrospray ionization / A utilização da química computacional em processos químicos relacionados à ionização por electrospray
In recent decades, the development of atmospheric ionization techniques improved mass spectrometry, principally for characterization and structural elucidation of high-molecular weight compounds. The development of spray ionization was responsible for the spread of applications and studies of mass spectrometry, where the electrospray ionization is the most v
Publicado em: 2009
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4. Fabricação e caracterização de dispositivos poliméricos emissores de luz com camada ativa de poli(2-metóxi, 5-(2-etil-hexilóxi)-1,4-fenileno vinileno) (MEH-PPV) / Fabrication and characterization of polymer light-emitting diodes with active layer composed by poly(2-methoxy, 5-(2-etil-hexilhoxy)-1,4-phenilene vinilene) (MEH-PPV).
Polymer light emitting diodes (PLEDs) have been widely investigated as candidate materials for display fabrication. The main advantages exhibited by PLEDs are the low-cost processing and possibility of large-area display fabrication, in comparison to the conventional liquid crystal displays (LCDs). Although the engineering aspects concerning device fabricati
Publicado em: 2008
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5. Investigação em eletrônica molecular: um estudo via cálculos de primeiros princípios / Molecular electronics investigation: a first principles study
O iminente fim da "era do Silício" tem motivado a busca de novas tecnologias para utilização na indústria eletrônica. Dentre estas tecnologias, a eletrônica molecular explora o uso moléculas como elementos funcionais em dispositivos eletrônicos. Nesta Tese, realizamos cálculos de primeiros princípios baseados na teoria do funcional da densidade (DF
Publicado em: 2007
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6. Filmes poliméricos ultrafinos produzidos pela técnica de automontagem: preparação, propriedades e aplicações
The self-assembly technique is a powerful tool to fabricate ultrathin films from organic compounds aiming at technological applications in molecular electronics. This relatively new approach allows molecularly flat films to be obtained on a simple and cheap fashion from various types of material, including polyelectrolytes, conducting polymers, dyes and prot
Química Nova. Publicado em: 2001-04
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7. Espectroscopia de lente termica : propriedades termicas de cristais liquidos
Liquid Crystals are fluids that present intermediate properties between solid and liquid, and consist of a molecular arrange with structural order. These systems are classified as Thermotropic Liquid Cristals, Lyotropie Liquid Crystals and Plastic Crystals. Since their discovery, these systems have shown to be an important area of condensed matter research.
Publicado em: 1997
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8. A fullerene molecular tip can detect localized and rectified electron tunneling within a single fullerene–porphyrin pair
A fullerene molecular tip was used to detect electron tunneling from a single porphyrin molecule. Electron tunneling was found to occur locally from an electron-donating moiety of the porphyrin to the fullerene through charge-transfer interaction between them. In addition, electron tunneling within the single fullerene–porphyrin pair exhibited rectifying b
National Academy of Sciences.
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9. DNA nanotubes self-assembled from triple-crossover tiles as templates for conductive nanowires
DNA-based nanotechnology is currently being developed as a general assembly method for nanopatterned materials that may find use in electronics, sensors, medicine, and many other fields. Here we present results on the construction and characterization of DNA nanotubes, a self-assembling superstructure composed of DNA tiles. Triple-crossover tiles modified wi
National Academy of Sciences.
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10. Discrete two-terminal single nanocluster quantum optoelectronic logic operations at room temperature
Readily formed at nanoscale break junctions, arrays of individual spatially isolated, strongly electroluminescent Ag2–Ag8 nanoclusters perform complex logic operations within individual two-terminal nanoscale optoelectronics devices. Simultaneous electrical excitation of discrete room-temperature nanocluster energy levels directly yields AND, OR, NOT, XOR,
The National Academy of Sciences.
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11. A Viral Platform for Chemical Modification and Multivalent Display
The ability to chemically modify the surfaces of viruses and virus-like particles makes it possible to confer properties that make them potentially useful in biotechnology, nanotechnology and molecular electronics applications. RNA phages (e.g. MS2) have characteristics that make them suitable scaffolds to which a variety of substances could be chemically at
BioMed Central.
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12. Molecular electronics of a single photosystem I reaction center: studies with scanning tunneling microscopy and spectroscopy.
Thylakoids and photosystem I (PSI) reaction centers were imaged by scanning tunneling microscopy. The thylakoids were isolated from spinach chloroplasts, and PSI reaction centers were extracted from thylakoid membranes. Because thylakoids are relatively thick nonconductors, they were sputter-coated with Pd/Au before imaging. PSI photosynthetic centers and ch