Dielectric response

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  • The definition for dielectric constant relates to the permittivity of the material (symbol use here ε). The permittivity expresses the ability of a material to polarise in response to an applied field. It is the ratio of the permittivity of the dielectric to the permittivity of a vacuum. Physically it means the greater the polarisation developed by a material in an applied field of given strength, the greater the dielectric constant will be. Traditionally dielectric materials are made from inorganic substances eg. mica and silicon dioxide.

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  • Ionic Liquids (ILs) are one of the most interesting and rapidly developing areas of modern physical chemistry, technologies and engineering. This book, consisting of 29 chapters gathered in 4 sections, reviews in detail and compiles information about some important physical-chemical properties of ILs and new practical approaches. This is the first book of a series of forthcoming publications on this field by this publisher.

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  • Increased miniaturization of the integrated chip has largely been responsible for the rapid advances in semiconductor device performance, driving the industry’s growth over the past decade(s). Soon the minimum feature size in a typical integrated circuit device will be well below 100 nm. At these dimensions, interlayers with extremely low dielectric constants (k) are imperative to reduce the cross-talk between adjacent lines and also enhance device speed. State-of-the-art non-porous, silicon-based low-k dielectric materials have k values on the order of 2.7....

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  • Dyadic Green’s Functions in Spheroidal Systems 3.1 DYADIC GREEN’S FUNCTIONS To analyze the electromagnetic radiation from an arbitrary current distribution located in a layered inhomogeneous medium, the dyadic Green’s function (DGF) technique is usually adopted. If the geometry involved in the radiation problem is spheroidal, the representation of dyadic Green’s functions under the spheroidal coordinates system should be most convenient.

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  • Paleo et al. Nanoscale Research Letters 2011, 6:257 http://www.nanoscalereslett.com/content/6/1/257 NANO EXPRESS Open Access Thermal, dielectrical and mechanical response of a and b-poly(vinilydene fluoride)/Co-MgO nanocomposites Antonio José Paleo1*, Carlos Martínez-Boubeta2, Lluís Balcells3, Carlos Miguel Costa4, Vitor Sencadas5 and Senentxu Lanceros-Mendez5 Abstract Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared.

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  • (BQ) This study was made only for the finish stages and has been carried out on the influence of five design factors: intensity supplied by the generator of the EDM machine (I), pulse time (ti), duty cycle (η), open-circuit voltage (U) and dielectric flushing pressure (P), over the two previously mentioned response variables. This has been done by means of the technique of design of experiments (DOE), which allows us to carry out the above-mentioned analysis performing a relatively small number of experiments.

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