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Electronic Applications (electronic + application)
Selected AbstractsBaTiO3,Epoxy Composites for Electronic ApplicationsINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Issue 4 2010Leandro Ramajo A brief review related with dielectric properties of BaTiO3/epoxy composites is presented. The composites were obtained using the dipping technique. To facilitate the mixing and modify the filler surface, a solvent and a surface coupling agent were used. Intermediate and low concentrations of solvent and silane improved microstructure and dielectric properties of the composite material, whereas higher concentrations led to composites of poor quality. Finally, a model using finite elements was used, in order to predict the composite permittivity in relation to the percentage of filler. Model results were compared with the effective medium theory and experimental results. [source] Proceedings of the E-MRS 2003 Fall Meeting , Symposia A and CPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 2 2004Marek Godlewski This volume contains the proceedings of Symposium A: Novel Wide Bandgap Materials for Optoelectronic and Electronic Applications and Symposium C: 5th International Workshop on Molecular Beam Epitaxy and Vapour Phase Epitaxy Growth Physics and Technology at the E-MRS 2003 Fall Meeting, organized by the European Materials Research Society for the first time in Warsaw, Poland, 15,19 September 2003. Symposium A reviewed recent progress in the studies of wide bandgap materials such as nitrides and ZnO, as well as in relevant experimental techniques, whereas Symposium C was devoted to the current trends in physics and technology of MBE and MOCVD. [source] E-MRS 2003 Fall Meeting Symposium A: Novel Wide Bandgap Materials for Optoelectronic and Electronic ApplicationsPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 2 2004Marek Godlewski No abstract is available for this article. [source] Synthesis of Novel Pyrene Discotics for Potential Electronic Applications.CHEMINFORM, Issue 49 2007Bilal R. Kaafarani Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Practical One-Step Synthesis of Symmetrical Liquid Crystalline Dialkyloligothiophenes for Molecular Electronic Applications.CHEMINFORM, Issue 28 2006Julie Leroy Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Thermoplastic Extrusion to Highly-Loaded Thin Green Fibres Containing Pb(Zr,Ti)O3,ADVANCED ENGINEERING MATERIALS, Issue 5 2005J. Heiber Because of their piezoelectric properties lead zirconate titanate (PZT) fibres are used in several electronic applications. Such fibres can be produced by extrusion. Therefore the extrusion behaviour of highly loaded thermoplastic feedstocks (PZT-polymer compound) has been investigated depending on the surfactant concentration and the powder preparation method. After sintering butterfly curves were measured for single fibres. [source] Self-Assembly of a Donor-Acceptor Dyad Across Multiple Length Scales: Functional Architectures for Organic ElectronicsADVANCED FUNCTIONAL MATERIALS, Issue 15 2009Jeffrey M. Mativetsky Abstract Molecular dyads based on polycyclic electron donor (D) and electron acceptor (A) units represent suitable building blocks for forming highly ordered, solution-processable, nanosegregated D-A domains for potential use in (opto)electronic applications. A new dyad, based on alkyl substituted hexa- peri -hexabenzocoronene (HBC) and perylene monoimide (PMI) separated by an ethinylene linker, is shown to have a high tendency to self-assemble into ordered supramolecular arrangements at multiple length scales: macroscopic extruded filaments display long-range crystalline order, nanofiber networks are produced by simple spin-coating, and monolayers with a lamellar packing are formed by physisorption at the solution-HOPG interface. Moreover, highly uniform mesoscopic ribbons bearing atomically flat facets and steps with single-molecule heights self-assemble upon solvent-vapor annealing. Electrical measurements of HBC-PMI films and mesoscopic ribbons in a transistor configuration exhibit ambipolar transport with well balanced p- and n-type mobilities. Owing to the increased level of order at the supramolecular level, devices based on ribbons show mobility increases of more than one order of magnitude. [source] Charge Transport Physics of Conjugated Polymer Field-Effect TransistorsADVANCED MATERIALS, Issue 34 2010Henning Sirringhaus Abstract Field-effect transistors based on conjugated polymers are being developed for large-area electronic applications on flexible substrates, but they also provide a very useful tool to probe the charge transport physics of these complex materials. In this review we discuss recent progress in polymer semiconductor materials, which have brought the performance and mobility of polymer devices to levels comparable to that of small-molecule organic semiconductors. These new materials have also enabled deeper insight into the charge transport physics of high-mobility polymer semiconductors gained from experiments with high charge carrier concentration and better molecular-scale understanding of the electronic structure at the semiconductor/dielectric interface. [source] Strong Luminescent Iridium Complexes with C,N=N Structure in Ligands and Their Potential in Efficient and Thermally Stable Phosphorescent OLEDs,ADVANCED MATERIALS, Issue 3 2009Bao Xiu Mi Homoleptic iridium complexes with C,N=N type ligands, i.e., 1,4-bis (phenyl) phthalazine (BPPa) and 3,6-bis(phenyl)pyridazine (BPPya), are strong phosphorescents, easy to synthesize, and thermally stable, thus having great potential in optical electronic applications, as demonstrated in Ir(BPPa)3 -based OLED devices. A quantum chemistry study shows that C,N=;N type ligands can bond to Ir more strongly. [source] Dibenzotetrathiafulvalene Bisimides: New Building Blocks for Organic Electronic Materials**,ADVANCED MATERIALS, Issue 19 2007K. Gao A new class of organic species, dibenzotetrathiafulvalene bisimides (see figure), were designed and synthesized by using a facile and general synthetic strategy. The new bisimides possess a diverse library of derivatives with various functionalities at the imide rings, and they show promise for use in a range of organic electronic applications. [source] Self-Assembly and Electronics of Dipolar Linear Acenes,ADVANCED MATERIALS, Issue 4 2005Q. Miao Linear acenes terminated with quinones demonstrate that electrostatic complementarity is a viable self-assembly motif for organic semiconductors. An organic field-effect transistor with co-facial, head-to-tail stacks with ,-surfaces 0.1,Å closer together than the aromatic planes of graphite is fabricated. The field-effect mobilities and ON/OFF current ratios are high enough to be useful in flexible electronic applications. [source] Polymeric Toughening of Particle Filled Cyanate Ester CompositesMACROMOLECULAR MATERIALS & ENGINEERING, Issue 10 2005Tim J. Wooster Abstract Summary: The present study examines the effect of polymeric tougheners on the performance of silica filled cyanate ester composites. The polymeric tougheners used have been shown to enhance cyanate ester tougheners in binary toughener/matrix systems. Tougheners that were able to form a favourable phase-separated morphology resulted in the greatest increase in crack resistance. The addition of these tougheners resulted in minimal loss of strength, and a slight decrease in modulus. Importantly the viscosity of the compounded systems was low enough for them to be readily processable. Whilst conserving most secondary properties, toughener addition did result in a slight increase in composite hydrolytic degradation. This issue was linked to the additive/ additive compounding processes. Removal of this extra moisture should eliminate this concern, permitting the used of these composites in electronic applications. Effect of ETBN content on the crack resistance of particle filled cyanate ester composites and SEM image of 15 matrix wt.-% ETBN. [source] Effect of precursor concentration on the structural and optical properties of ZnO nanostructuresPHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 7 2010Sharul Ashikin Kamaruddin Abstract Zinc oxide (ZnO) is an emerging material in large area electronic applications such as thin-film solar cells and transistors. We report on the fabrication and characterization of ZnO nanostructures. ZnO nanostructures have been synthesized using sol,gel immerse technique on oxidized silicon substrates. Different precursor's concentrations ranging from 0.0001 to 0.01,M using zinc nitrate hexahydrate [Zn(NO3)2.6H2O] and hexamethylenetetramine [C6H12N4] has been employed in the synthesis of ZnO nanostructures. The surface morphologies were examined using scanning electron microscope (SEM) and atomic force microscopy (AFM). In order to investigate the structural properties, the ZnO nanostructures were measured using X-ray diffractometer (XRD). The optical properties of the ZnO nanostructures were measured using photoluminescence (PL) spectrometer. [source] Carbon nanotube based composites for electronic applications: CNT,conducting polymers, CNT,CuPHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 6 2006N. Ferrer-Anglada Abstract We performed two different types of composites using single wall carbon nanotubes: 1) transparent electrodes, using a thin network of carbon nanotubes as electrode on which we can grow a conducting polymer electrochemically on it, polyaniline or polypirrole, CNT,CP; the obtained thin films are both transparent (transmission coefficient T from 70% to 95%) and electrically conducting. The samples were observed by AFM, optical and Raman spectroscopy, room temperature electrical conductivity were performed. 2) CNT with a metal, copper in our case (CNT,Cu), as a material with high electrical and thermal conductivity and low coefficient of thermal expansion (CTE), to be used in electronic packaging. We observed the samples by AFM and SEM. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Structural materials underpinning functional materials: teaching old dogs new tricksPOLYMER INTERNATIONAL, Issue 5 2008William A MacDonald Abstract ,Structural' polymers are finding new applications underpinning new technology developments based on functional polymers. This paper discusses the use of polyester films as base substrates for flexible electronic applications based on conjugated polymers and low-temperature hydrogenated amorphous silica processing, and discusses the challenges involved in successfully developing substrates ,fit for purpose'. Copyright © 2008 Society of Chemical Industry [source] | |||||||||||||||||||||||||