Ion Conductor
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Aplicação de novos materiais em transistores de efeito de campo ferroelétricos
In this work, we investigated the electrical properties of the polyelectrolyte PSS in its sodium form (PSS-Na, Polystyrene sulfonic in the sodium form) and acid form (PSS-H, polystyrene sulfonic in the acid form) and also doped with Fe3+ for application in Ferroelectric Field Effect Transistors (Fe-FET). The PSS-Na was acquired from Aldrich and PSS-H was obt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2012
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2. Implantação iônica de baixa energia em polímero para desenvolvimento de camadas compósitas nanoestruturadas condutoras litografáveis. / Low energy ion implantation into polymers to develop conductive composite layers for lithography.
Electronics using polymers instead of silicon is a recent research area with promising economic perspectives. Polymer with metallic particles composites presents interesting electrical, magnetic and optical properties and they have been produced by a broad variety of techniques. Metal ion implantation using plasma is one of the used methods to obtain conduct
Publicado em: 2010
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3. SÃntese, caracterizaÃÃo e propriedades fotocrÃmicas da sais derivados do Ãcido N-(3,5-dinitrobenzoil)-α-fenilglicina
The preparation and characterization of salts derived from N-(3,5- dinitrobenzoyl)-α-phenylglycine was carried out by using protonated amines as counter-ion, as follows: NH4 + (DNBAm), (CH3-CH2-)2NH2 + (DNBD), (CH3-CH2-CH2- )NH3 + (DNBP), (CH3-CH2-CH2-CH2-)NH3 + (DNBBu) and (CH3-CH2-)3NH+ (DNBT). These salts showed photocromic effect with ultraviolet (U
Publicado em: 2008
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4. Electrical conductivity of borate, silicate and silica-sulphate glasses of alkaline ions. / Condutividade elétrica de vidros de boratos, silicatos e sílico-sulfatos de íons alcalinos.
Conducting glasses based on borates, silicates and silica-sulfates of alkali metals have been prepared from an appropriate mixture of powder of oxides, carbonates and sulfates. They were produced by fusion in a silicon carbide furnace up to 1400ºC and then by fast cooling. These materials have been analyzed with techniques of DC conductivity and Impedan
Publicado em: 2000
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5. Nuclear magnetic resonance in superionics conductors with fluorite-type structure. / Ressonância magnética nuclear em condutores superiônicos de estrutura fluorita.
The 19F NMR relaxation times T1 and T2 were measured is ternary and nonstoichiometric compounds with the fluorite-type structure. We have studied the Na0.4Y0.6F2.2 crystal in the temperature range 600K to 900K, where the crystal hás not the fluorite structure. The T1 values were measured in two Larmor frequencies: 20.42 MHz and 34.24 MHz. The results for T1
Publicado em: 1990
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6. Self-organization of self-assembled photonic materials into functional devices: Photo-switched conductors
Linear porphyrin arrays self-assembled by either hydrogen bonding or metal ion coordination self-organize into lipid bilayer membranes. The length of the transmembrane assemblies is determined both by the thermodynamics of the intermolecular interactions in the supermolecule and by the dimension and physical chemical properties of the bilayer. Thus, the size
National Academy of Sciences.
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7. Mg2+/KCl-ATPase of plant plasma membranes is an electrogenic pump
The function of the Mg2+-requiring KCl-stimulated ATPase (ATP phosphohydrolase, EC 3.6.1.3) of higher plants in active ion transport was investigated by using a purified microsomal fraction containing sealed plasma membrane vesicles. (Sze, H. (1980) Proc. Natl. Acad. Sci. USA 77, 5904-5908). A transmembrane electrical potential (+30 to +44 mV), monitored by
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8. Dual mechanism for stimulation of glutamate transport by potassium ions in Streptococcus mutans.
An ATP-driven primary transport system operative for L-glutamate or L-aspartate in Streptococcus mutans is, through the entire pH range from 5.5 to 8.5, specifically stimulated by extracellular potassium ions. The stimulation by potassium ions observed in the low pH range between 5.5 and 7 has been interpreted to be due to potassium ion-dependent regulation
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9. The contribution of phosphate–phosphate repulsions to the free energy of DNA bending
DNA bending is important for the packaging of genetic material, regulation of gene expression and interaction of nucleic acids with proteins. Consequently, it is of considerable interest to quantify the energetic factors that must be overcome to induce bending of DNA, such as base stacking and phosphate–phosphate repulsions. In the present work, the electr
Oxford University Press.