Metal
hideIn 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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News tagged with metal
Physicists tweak quantum force, reducing barrier to tiny devices
Jul 14, 2008 |
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Cymbals don't clash of their own accord – in our world, anyway. But the quantum world is bizarrely different. Two metal plates, placed almost infinitesimally close together, spontaneously attract each other.
Discovery about behavior of building block of nature could lead to computer revolution
Jul 30, 2009 |
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(PhysOrg.com) -- A team of physicists from the Universities of Cambridge and Birmingham have shown that electrons in narrow wires can divide into two new particles called spinons and a holons.
Scientists build 'single-atom transistor'
Dec 06, 2009 |
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(PhysOrg.com) -- Researchers from Helsinki University of Technology (Finland), University of New South Wales (Australia), and University of Melbourne (Australia) have succeeded in building a working transistor, ...
New research shows why metal alloys degrade
Sep 24, 2008 |
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(PhysOrg.com) -- Metal alloys can fail unexpectedly in a wide range of applications -- from jet engines to satellites to cell phones—and new research from the University of Michigan helps to explain why.
Glass you can build with: Metallic glass that's stronger and lasts longer
Mar 24, 2009 |
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(PhysOrg.com) -- The normal structure of metals is crystalline. Glass, on the other hand, is amorphous. But it's possible to make amorphous forms of metal, metallic glasses, which can be remarkably strong, ...
Memristor chip could lead to faster, cheaper computers
Mar 17, 2009 |
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(PhysOrg.com) -- The memristor is a computer component that offers both memory and logic functions in one simple package. It has the potential to transform the semiconductor industry, enabling smaller, faster, cheaper chips ...
Researchers create all-electric spintronics
Oct 27, 2009 |
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A multidisciplinary team of UC researchers is the first to find an innovative and novel way to control an electron's spin orientation using purely electrical means.
In 'novel playground,' metals are formed into porous nanostructures
Nanotechnology / Nanomaterials
Jun 27, 2008 |
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For 5,000 years or so, the only way to shape metal has been to "heat and beat." Even in modern nanotechnology, working with metals involves carving with electron beams or etching with acid.
Chemist Travels World to Study Mysterious Properties of Neutrinos
Aug 19, 2008 |
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In the quest to better understand one of nature's most "ghostly" elementary particles — the neutrino — scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory are spreading their expertise from ...
Improved redox flow batteries for electric cars
Oct 13, 2009 |
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A new type of redox flow battery presents a huge advantage for electric cars. If the rechargeable batteries are low, the discharged electrolyte fluid can simply be exchanged at the gas station for recharged ...
Scientists develop revolutionary microchip that uses 30 times less energy
Feb 09, 2009 |
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Leaving your mobile phone charger at home when you go for a two week long vacation may just be the norm one day as scientists from Nanyang Technological University (NTU) and Rice University, United States, have successfully ...
Flexible, transparent supercapacitors -- bend and twist them like a poker card
Mar 31, 2009 |
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It is a completely transparent and flexible energy conversion and storage device that you can bend and twist like a poker card.
Noble metal nanoparticles deposit on the mycelium of growing fungi--an approach to new catalytic systems?
Sep 18, 2008 |
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(PhysOrg.com) -- When fungi, such as penicillium, grow, they form a thread-like network, the mycelium. If the fungus is grown in a medium containing nanoscopic particles of a noble metal, the resulting mycelium is coated ...
Hydrogen cars closer to reality with new storage system design
Apr 02, 2009 |
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Researchers have developed a critical part of a hydrogen storage system for cars that makes it possible to fill up a vehicle's fuel tank within five minutes with enough hydrogen to drive 300 miles.
Batteries get a (nano)boost
Feb 09, 2009 |
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Need to store electricity more efficiently? Put it behind bars. That's essentially the finding of a team of Rice University researchers who have created hybrid carbon nanotube metal oxide arrays as electrode material that ...
