نتایج جستجو برای: electric conductivity

تعداد نتایج: 187335  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Jean-Philippe Péraud Andrew J Nonaka John B Bell Aleksandar Donev Alejandro L Garcia

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...

Journal: :Nature nanotechnology 2015
Muharrem Acerce Damien Voiry Manish Chhowalla

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...

2016
Hualin Zhan David J. Garrett Nicholas V. Apollo Kumaravelu Ganesan Desmond Lau Steven Prawer Jiri Cervenka

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...

2015
Suqing Ci Zhenhai Wen Yuanyuan Qian Shun Mao Shumao Cui Junhong Chen

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...

2012
M. Essone Mezeme M. Kranjc F. Bajd D. Miklavčič

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...

2017
H Khanbareh S van der Zwaag WA Groen

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...

Journal: :ACS applied materials & interfaces 2015
Sung-Kon Kim Euiyeon Jung Matthew D Goodman Kenneth S Schweizer Narihito Tatsuda Kazuhisa Yano Paul V Braun

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 ...

2002
Liliana Borcea

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)

Journal: :Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging 2008
Orjan G Martinsen Sverre Grimnes Simen H Nilsen

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...

2009
Siddhartha Das Suman Chakraborty

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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