Engineering

Research allows for 3D printing of 'organic electronics'

When looking at the future of production of micro-scale organic electronics, Mohammad Reza Abidian—associate professor of Biomedical Engineering at the University of Houston Cullen College of Engineering—sees their potential ...

Electronics & Semiconductors

Ink coating could enable devices powered by heat

Researchers in Sweden report that they are closing in on a way to replace batteries for wearables and low-power applications in the internet of things (IoT). The answer lies in an ink coating that enables low-grade heat, ...

Engineering

A stretchy display for shapable electronics

No one would ever imagine crumpling up their smartphone, television or another electronic device. Today's displays—which are flat, rigid and fragile—lack the ability to reshape to interactively respond to users.

Electronics & Semiconductors

Eco-friendly micro-supercapacitors using fallen leaves

A KAIST research team has developed a graphene-inorganic-hybrid micro-supercapacitor made of leaves using femtosecond direct laser writing lithography. The advancement of wearable electronic devices is synonymous with innovations ...

Electronics & Semiconductors

Shellac for printed circuits

More precise, faster, cheaper: Researchers all over the world have been working for years on producing electrical circuits using additive processes such as robotic 3D-printing (so-called robocasting) with great success, but ...

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Electrical conductivity

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.

This text uses material from Wikipedia, licensed under CC BY-SA