Electronics & Semiconductors
To reduce carbon emissions and still meet the growing demands of the electronics industry, scientists will need to develop alternative battery technologies that are more durable, sustainable, and can store more energy. In ...
Electronics & Semiconductors
Flexible electrodes, electronic components that conduct electricity, are of key importance for the development of numerous wearable technologies, including smartwatches, fitness trackers and health monitoring devices. Ideally, ...
Robotics
Origami robots can be formed by tightly integrating multiple functions of actuation, sensing and communication. But the task is challenging as conventional materials including plastics and paper used for such robotic designs ...
Energy & Green Tech
Researchers at MIT say they have created a new material that will pave the way to faster charging batteries.
Energy & Green Tech
According to the United Nations, less than a quarter of all U.S. electronic waste gets recycled. In 2021 alone, global e-waste surged at 57.5 million tons, and only 17.4% of that was recycled.
Aug 29, 2022
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Engineering
Smart fabrics and wearable electronics can be developed using highly conductive and stretchy fibers. Most of these fiber conductors are, however, strain sensitive with limited conductance on stretching. As a result, a new ...
Engineering
Engineers at the University of California San Diego have developed a wearable patch that could provide personalized cooling and heating at home, work, or on the go. The soft, stretchy patch cools or warms a user's skin to ...
May 17, 2019
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Engineering
Most people do not give the U.S. electric grid a second thought—we flip a switch, and the lights come on. Behind the scenes are thousands of power plants and utilities linked by millions of miles of transmission lines. ...
Apr 16, 2024
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Engineering
Controlling heat flow is key to enhancing performance in a wide variety of systems. In electronic devices, such as mobile phones or any type of processor, overheating decreases their performance and reduces their lifetime. ...
Apr 11, 2024
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Energy & Green Tech
Scientists have discovered a stable and highly conductive lithium-ion conductor for use as solid electrolytes for solid-state lithium-ion batteries.
Apr 2, 2024
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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
