An international research team led by the University of Göttingen has demonstrated experimentally that electrons in naturally occurring double-layer graphene move like particles without any mass, in the same way that light ...
Nanophysics
Apr 16, 2024
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362
High entropy alloys (HEAs) have attracted significant attention in various fields due to their unique properties such as high strength and hardness, and high thermal and chemical stabilities.
Nanophysics
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Among organic thermoelectric materials, PEDOT:PSS (poly(3,4-ethylenedioxythiophene-poly(4-styrenesulfonate)) thin films have received extensive attention but suffer from low Seebeck coefficients of 10–20 μV K-1 due to ...
Analytical Chemistry
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12
Thanks to a new design contributed by a research team led by Prof. Zhao Peng from Hefei Institutes of Physical Science (HFIPS) of Chinese Academy of Sciences (CAS), the operation time for plasma torch gas been extended from ...
Plasma Physics
Mar 20, 2024
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17
The Korea Research Institute of Standards and Science (KRISS) has developed a hybrid nano-microscope capable of simultaneously measuring various nano-material properties. This nano-microscope is essential for researching ...
Nanophysics
Mar 6, 2024
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22
Researchers from the University of Tsukuba have developed an innovative methodology for measuring the electrical conductivity of microbial communities. This methodology holds promise for the development of batteries and electrochemical ...
Cell & Microbiology
Feb 29, 2024
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2
A TU/e and Catalan Institute of Nanoscience and Nanotechnology-led collaboration involving researchers from around the world has the answer, and the why, and the results have been published in the journal Science Advances.
Nanophysics
Feb 12, 2024
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57
One of the most important components of satellites that enable telecommunication is the waveguide, which is a metal tube for guiding radio waves. It is also one of the heaviest payloads satellites carry into orbit. As with ...
Nanomaterials
Feb 7, 2024
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136
Soil is the largest reservoir of microplastic (MP), with the corresponding content being 4 to 23 times that in oceans. Plastics are widely used in production and daily life due to their low cost, good ductility and durability. ...
Ecology
Jan 19, 2024
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1
A common carbon compound is enabling remarkable performance enhancements when mixed in just the right proportion with copper to make electrical wires. It's a phenomenon that defies conventional wisdom about how metals conduct ...
Materials Science
Dec 20, 2023
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4047
Electrical conductivity or specific conductance is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density to the electric field strength :
It is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.
Conductivity is the reciprocal (inverse) of electrical resistivity, ρ, and has the SI units of siemens per metre (S·m-1):
Electrical conductivity is commonly represented by the Greek letter σ, but κ (esp. in electrical engineering science) or γ are also occasionally used.
An EC meter is normally used to measure conductivity in a solution.
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