نتایج جستجو برای: electric conductivity
تعداد نتایج: 187335 فیلتر نتایج به سال:
We analyze the effects of an externally applied electric field on thermal fluctuations for a binary electrolyte fluid. We show that the fluctuating Poisson-Nernst-Planck (PNP) equations for charged multispecies diffusion coupled with the fluctuating fluid momentum equation result in enhanced charge transport via a mechanism distinct from the well-known enhancement of mass transport that accompa...
Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show that chemically exfoliated nanosheets of MoS2 con...
High surface area electrode materials are of interest for a wide range of potential applications such as super-capacitors and electrochemical cells. This paper describes a fabrication method of three-dimensional (3D) graphene conformally coated on nanoporous insulating substrate with uniform nanopore size. 3D graphene films were formed by controlled graphitization of diamond-like amorphous carb...
We propose a 'weaving' evolution mechanism, by systematically investigating the products obtained in controlled experiments, to demonstrate the formation of Ni-based 'microflowers' which consists of multiple characteristic dimensions, in which the three dimensional (3D) NiO 'microflower' is constructed by a two-dimensional (2D) nanosheet framework that is derived from weaving one-dimensional (1...
We report calculations of the anisotropy ratio of the electrical conductivity of a simple model of a loose connective biological tissue described as a random assembly of multiscale undeformable core-shell and controlled polydisperse spherical structures. One can estimate a 10% increase in the anisotropy ratio due to the application of electric field (duration 100 lm) above the electroporation t...
Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0-3 and quasi 1-3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the matrix and poling at a high temperature and under a h...
We report a three-dimensional (3D) porous carbon electrode containing both nanoscale and microscale porosity, which has been hierarchically organized to provide efficient ion and electron transport. The electrode organization is provided via the colloidal self-assembly of monodisperse starburst carbon spheres (MSCSs). The periodic close-packing of the MSCSs provides continuous pores inside the ...
We review theoretical and numerical studies of the inverse problem of electrical impedance tomography which seeks the electrical conductivity and permittivity inside a body, given simultaneous measurements of electrical currents and potentials at the boundary. (Some figures in this article are in colour only in the electronic version)
BACKGROUND/PURPOSE Water absorption is important for the overall function of keratinized tissues like the stratum corneum and nail. Hence, measurement of water sorption dynamics and water content of these tissues is of great interest. METHODS We have studied water sorption and electrical properties of a human nail in a measuring cell where the temperature and relative hydration could be contr...
In this paper, the role of finite Electric Double Layer (EDL) conductivity on the Streaming Potential and the resulting Electroviscous effect in pressure-driven nanofluidic ionic transport is investigated. Important dimensionless parameters like the Dukhin number (based on the EDL surface electrical conductivity, the bulk electrical conductivity and the EDL thickness), ratio of the Stern Layer ...
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