Business

Cobalt hits headlines as Glencore shuts key mine

Cobalt hit the headlines Wednesday after Glencore shut a key African facility that mines the rare metal—and blamed prices that have been tumbling from highs seen in recent years on battery demand.

Energy & Green Tech

Applied physical sciences research advances solar energy

In an article published this month in Science, researchers in the Huang Group in the College of Arts & Sciences' department of applied physical sciences at The University of North Carolina at Chapel Hill revealed a new method ...

Robotics

A bio-inspired flow-sensing cupula for submersible robotics

Nature can be a precious source of inspiration for researchers developing robots and artificial intelligence (AI) systems. Studies in submersible robotics, for instance, have often tried to replicate or incorporate mechanisms ...

Energy & Green Tech

Magnetism: An unexpected push for the hydrogen economy

Humankind has entered uncharted territory: atmospheric CO2 levels have soared to a record-breaking 415 ppm for the first time in human history. The need to find a sustainable alternative to CO2-producing fuels is urgent. ...

Energy & Green Tech

Threat or promise? E-auto boom could cost industry jobs

Over 115 years the auto industry in the east German town of Zwickau has lived through wrenching upheavals including World War II and the collapse of communism. Now the city's 90,000 people are plunging headlong into another ...

Engineering

A new era in 3-D printing

In the mid-15th century, a new technology that would change the course of history was invented. Johannes Gutenberg's printing press, with its movable type, promoted the dissemination of information and ideas that is widely ...

Engineering

3-D printing of metallic micro-objects

3-D printing has become an increasingly important production method. Researchers at ETH have now developed a new 3-D printing technique by which micrometre-sized objects made of several metals can be produced with high spatial ...

Energy & Green Tech

New 'blue-green' solution for recycling world's batteries

Rice University researchers literally have a solution to deal with the glut of used lithium-ion batteries left behind by the ever-increasing demand for electric vehicles, cellphones and other electronic devices.

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Metal

In chemistry, a metal (Greek: Metallo, Μέταλλο) is an element, compound, or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations); those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The thus produced solid is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds.

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