electrical conductivity Articles

Electrical conductance in a typical linear and cyclic quantum wire

Theoretical studies on electrical conductance in nanostructures which consist of two semi-infinite leads separated by a typical molecular wire are carried out within Green's function (GF) formalism in the linear regime. For this reason, the GF of extended molecular wire is obtained. Hence, the electrical conductance of the system is derived theoretically, using the GF elements and wire ...

Aug. 3, 2009

By Inderscience Publishers

Conducting core-sheath polyurethane-PEDOT nanofibres for conducting polymer actuator

Conducting core-sheath nanofibres were prepared by the vapour-phase polymerisation of poly(3,4-ethylenedioxy thiophene) (PEDOT) on electrospun polyurethane (PU) nanofibres both with and without incorporating graphene nanoplatelets (GNPs) as the core part. The morphology, mechanical properties, electrical conductivity, and electroactive actuation of the core-sheath nanofibres were investigated. ...

Jun. 3, 2013

By Inderscience Publishers

Electrical conductivity as a state indicator for the start-up period of anaerobic fixed-bed reactors

The aim of this work was to analyse the applicability of electrical conductivity sensors for on-line monitoring the start-up period of an anaerobic fixed-bed reactor. The evolution of bicarbonate concentration and methane production rate was analysed. Strong linear relationships between electrical conductivity and both bicarbonate concentration and methane production rate were observed. ...

Feb. 10, 2016

By IWA Publishing

Development of an experimental model of the carotid bifurcation using electrically conductive silicone: an introduction to the incorporation of baroreceptor function within a mimetic model of the carotid artery

This study assesses the suitability of developing a material for use in an experimental model of the carotid baroreceptors. Such a model could then be used in future studies to assess the impact of carotid artery stenting on hemodynamic stability. The material must exhibit a significant measurable electrical response to strain in a fashion analogous to baroreceptor behaviour. A modified ...

Nov. 15, 2012

By Inderscience Publishers

Conductivity Theory and Measurement

Electrical conductivity is a measure of the ability of a solution to cany* a current. Current flow in liquids differs from mat in metal conductors in that electrons cannot flow freely, but must be carried by ions. Ions are formed when a solid such as salt is dissolved in a liquid to form electrical components having opposite electrical charges. For example, sodium chloride separates to form Na" ...

Jan. 1, 2005

By IC Controls Ltd.

Electrical properties of biogenic material: bilirubin rich gallstone

The electrical properties of Bilirubin Rich Gallstone (BGS) were investigated by the Complex Impedance Spectroscopy (CIS) technique. The dielectric relaxation was found to be of non-Debye type. Evidences of temperature-dependent electrical relaxation phenomena as well as Negative Temperature Coefficient of Resistance (NTCR) character of the sample have been observed. The ac conductivity obeys the ...

Jan. 28, 2008

By Inderscience Publishers

Synthesis and characterisation of electrical conducting nanoporous carbon structures based on pyrogallol-formaldehyde

Electrical conducting carbon (ECC) nanoporous structures were explored by changing the pyrolysis temperature of organic xerogel compounds prepared by sol-gel method from pyrogallol-formaldehyde (PF) mixture in water using picric acid as catalyst. The effect of these preparation parameters on the structural and electrical properties of the obtained ECCs was studied. The obtained results revealed ...

Aug. 10, 2009

By Inderscience Publishers

Development of Pd-coated ceramic electrodes in hybrid sulphur cycle

The Hybrid Sulphur (HyS) cycle has attracted much attention as a mass production process for hydrogen. It consists of an electrolysis step and a thermal decomposition one. In order to achieve high efficiency for hydrogen production and operational cost reduction, some developments in electrode materials with high corrosion resistance, high electrical conductivity and low anodic potential is a key ...

Mar. 16, 2009

By Inderscience Publishers

Researchers Improve Electrical Conductivity of Conductive Coating Materials

Researchers at the Massachusetts Institute of Technology (MIT) have further enhanced a transparent and conductive coating material by increasing its electrical conductivity by 10 times. Illustration shows the apparatus used to create a thin layer of a transparent, electrically conductive material, to protect solar cells or other devices. The chemicals used to produce the layer, shown in tubes ...

Nov. 25, 2019

By MIT - Massachusetts Institute of Technology

Quantum chemical modelling of Al-doped PZT crystals

Complete analysis of the electronic and structural changes of the lead zirconate titanate (PZT) crystal due to aluminium impurity doping is done based on the computationally obtained results. The PZT is modelled at a concentration of the morphotropic phase boundary with the stoichiometry equal to PbZr0.53Ti0.47O3 and the chosen concentration of Al impurity is about 1.5%. A spontaneous occurrence ...

Oct. 23, 2006

By Inderscience Publishers

Electrical and thermal transport properties of magnetically aligned multi-walled carbon nanotubes spray coated on copper substrates

A magnetic field was applied to multi-walled carbon nanotubes (MWNTs) decorated with Fe 3 O 4 nanoparticles while being spray coated on copper substrates to obtain a preferred orientation. The Fe 3 O 4 -MWNTs hybrid materials were aligned vertical or horizontal on the copper substrate and their electrical and thermal transport properties were investigated. The electrical and thermal ...

Jun. 3, 2013

By Inderscience Publishers

Determining Bentonite Content in Soil-Bentonite Mixtures Using Electrical Conductivity

A procedure based on electrical conductivity is described for measuring bentonite content in soil-bentonite mixtures having a wide range of bentonite contents. Standard equipment used for sedimentation analysis and an electrical conductivity meter are required. The procedure employs calibration curves relating electrical conductivity and bentonite concentration for soil-bentonite-water slurries. ...

Mar. 1, 1996

By ASTM International

Defects in titanates

Electronic, structural and optical properties of titanates (BaTiO3, SrTiO3, CaTiO3 and PbTiO3) containing different point defects are reviewed and discussed in the present work. The results are obtained using a quantum-chemical method based on the Hartree-Fock formalism and utilising the Large Unit Cell (LUC) and the Embedded Molecular Cluster (EMC) models. The outcomes of the computations are ...

Jan. 13, 2005

By Inderscience Publishers

Grounding Conductor

COPPER-CLAD STEEL GROUNDING CONDUCTORS Copper-clad copperweld steel grounding material is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper-clad copperweld steel grounding conductors has the following advantages: With high strength With low price High corrosion resistance High electrical conductivity of copper APPLICATIONS OF CCS ...

Oct. 19, 2019

By Ningbo Zhenhai Beisuda Petrochemcial Equipment Co.,Ltd

Dielectrophoresis as a tool for nanoscale DNA manipulation

The use of the dielectrophoresis as a tool for DNA manipulation is demonstrated experimentally, using both unmodified 48,500 base pairs long bacteriophage lambda dsDNA (λ-DNA), ∼16 μm in length and 414 base pairs long thiol modified natural dsDNA (avDNA), ∼140 nm in length. We show that both the dsDNA types used, are effectively directed between the planar gold electrodes by the positive ...

Nov. 15, 2005

By Inderscience Publishers

Relationship of aquatic environmental factors with the abundance of <italic>Vibrio cholerae, Vibrio parahaemolyticus, Vibrio mimicus</italic> and <italic>Vibrio vulnificus</italic> in the coastal area of Guaymas, Sonora, Mexico

Relationship of aquatic environmental factors with the abundance of Vibrio cholerae, Vibrio parahaemolyticus, Vibrio mimicus and Vibrio vulnificus in the coastal area of Guaymas, Sonora, Mexico

Members of the genus Vibrio are common in aquatic environments. Among them are V. cholerae, V. vulnificus, V. parahaemolyticus and V. mimicus. Several studies have shown that environmental factors, such as temperature, salinity, and dissolved oxygen, are involved in their epidemiology. Therefore, the main objective of this study is to determine if there is a correlation between the ...

Dec. 11, 2013

By IWA Publishing

Thermal management of micro hotspots in electric components with carbon nanotubes

The excellent thermal and electrical conductivity as well as the remarkable mechanical properties of Carbon Nanotubes (CNTs) all point towards an unbeatable and facile route towards replacing traditional thermal management materials, like copper, in the electronics industry. In spite of that, the technology is still suffering from considerable challenges. In order to realise an actual ...

Dec. 10, 2012

By Inderscience Publishers

Calcite precipitation from aqueous solutions with different calcium and hydrogen carbonate concentrations

This paper describes the influence of different Ca2 + and HCO3− concentrations on the precipitation of calcite in aqueous solutions. Mixtures of CaCl2 and NaHCO3 solutions with different concentrations were stirred, covering a wide range of supersaturation and precipitation of calcite. The resulting reduction of the Ca2 + concentration was recorded as a function of time by measuring the ...

Dec. 1, 2010

By IWA Publishing

How non-ionic “electrically neutral” surfactants enhance electrical conductivity and ion stability in non-polar liquids

We show that it is possible to control the electrical conductivity of non-polar liquids such as kerosene using substances that are normally presumed to be non-dissociating and electrically neutral. This assumption is reflected even in the name “non-ionic surfactants”. These surfactants “solvate ions” in non-polar liquids by building protective shells around them, similar to the hydration layers ...

Mar. 1, 2006

By Dispersion Technology Inc.

Operation Principle of Eddy Current Separator

Operation Principle of Jiarun Eddy Current Separator Eddy current separators have a conveying belt with a rapidly rotating magnetic rotor in the drum. The high rotation speed of the magnets generates an induction field, producing a quickly alternating magnetic field. The separation is based on the principle that every electrically conductive particle located in an alternating magnetic field ...

Dec. 31, 2018

By Shijiazhuang Jiarun Technology Co., Ltd

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