Concept

Permittivité du vide

Publications associées (131)

Self-Repairable, High Permittivity Dielectric Elastomers with Large Actuation Strains at Low Electric Fields

A one-step process for the synthesis of elastomers with high permittivity, excellent mechanical properties and increased electromechanical sensitivity is presented. It starts from a high molecular weight polymethylvinylsiloxane, P1, whose vinyl groups serv ...

Wiley-Blackwell2015

Conductivity in organic semiconductors hybridized with the vacuum field

Francesco Stellacci

Much effort over the past decades has been focused on improving carrier mobility in organic thin-film transistors by optimizing the organization of the material or the device architecture. Here we take a different path to solving this problem, by injecting ...

Nature Publishing Group2015

Highly stretchable dielectric elastomer composites containing high volume fractions of silver nanoparticles

Heinrich Hofmann, Jose Enrico Quijano Quinsaat

The dielectric permittivity (epsilon') of a polymeric material can be significantly increased when blended with conductive fillers at concentrations approaching the percolation threshold. However, reproducible synthesis of such composites is after decades ...

Royal Society of Chemistry2015

Static Dielectric Permittivity of Ice from First Principles

Nicola Marzari, Nicéphore Arthur François Bonnet

The static permittivity of ice is computed from first principles as a function of the electric field, together with the generalized Kirkwood factor. The molecular dipole in ice is unambiguously obtained by an original method combining a slab approach and B ...

Amer Physical Soc2014

BiFeO3 Ceramics: Processing, Electrical, and Electromechanical Properties

Dragan Damjanovic

Bismuth ferrite (BiFeO3), a perovskite material, rich in properties and with wide functionality, has had a marked impact on the field of multiferroics, as evidenced by the hundreds of articles published annually over the past 10 years. Studies from the ver ...

Wiley-Blackwell2014

Effect of silane coupling agent on the morphology, structure, and properties of poly(vinylidene fluoride-trifluoroethylene)/BaTiO3 composites

Véronique Michaud, Yves Leterrier, Dragan Damjanovic, Sara Dalle Vacche

Micron- and submicron-sized barium titanate (BaTiO3) particles, untreated and surface modified with aminopropyl triethoxy silane, were incorporated in poly(vinylidene fluoride-trifluoroethylene) to fabricate composites with up to 60 vol% of ceramic phase. ...

Springer Verlag2014

Acoustic supercoupling through a density-near-zero metamaterial channel

Romain Christophe Rémy Fleury

Originally demonstrated with electromagnetic waves, supercoupling describes the extraordinary matched transmission, energy squeezing, and anomalous quasistatic tunneling through narrow channels. This behavior is the result of impedance matching achieved wh ...

2014

A Comparison of Frequency-Dependent Soil Models: Application to the Analysis of Grounding Systems

Nicolas Mora Parra, Damir Cavka

We present a review and comparison of different models representing the frequency dependence of the soil electrical parameters (conductivity and permittivity). These models are expressed in terms of curve-fit expressions for the soil conductivity and relat ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Evaluation of Lightning Electromagnetic Fields and Their Induced Voltages on Overhead Lines Considering the Frequency Dependence of Soil Electrical Parameters

Mario Paolone, Carlo Alberto Nucci, Keyhan Sheshyekani

This paper presents a comprehensive study on the effect of the frequency dependence of soil electrical parameters on the lightning radiated electromagnetic fields as well as their associated induced voltages on overhead lines. To this aim, a fullwave appro ...

Institute of Electrical and Electronics Engineers2013

Reoptimized interaction parameters for the peptide-backbone model compound N-methylacetamide in the GROMOS force field: Influence on the folding properties of two beta-peptides in methanol

Wei Huang, Bruno Araujo Cautiero Horta

Considering N-methylacetamide (NMA) as a model compound, new interaction parameters are developed for the amide function in the GROMOS force field that are compatible with the recently derived 53A6OXY parameter set for oxygen-containing chemical functions. ...

Wiley-Blackwell2012

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