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
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, ...
Researchers develop cheap, easy 'kitchen chemistry' to perform formerly complex synthesis
Chemistry / Analytical Chemistry
Dec 04, 2009 |
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A team at The Scripps Research Institute has made major strides in solving a problem that has been plaguing chemists for many years: how best to break carbon-hydrogen bonds and then to create new bonds to join molecules together. ...
Flight of fancy: MIT autonomous mini-helicopter solves one tough challenge
Dec 03, 2009 |
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In its first 18 years, the Association for Unmanned Vehicle Systems International’s annual aerial-robotics competition posed four successive challenges, which robotics researchers had to meet using entirely ...
Nanoparticles may cause DNA damage across a cellular barrier
Nanotechnology / Bio & Medicine
Nov 05, 2009 |
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(PhysOrg.com) -- Scientists have shown in the laboratory that metal nanoparticles damaged the DNA in cells on the other side of a cellular barrier. The research, by the University of Bristol, is published ...
How Size Matters For Catalysts: Study Links Size, Activity, Electronic Properties
Nanotechnology / Nanomaterials
Nov 05, 2009 |
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(PhysOrg.com) -- University of Utah chemists demonstrated the first conclusive link between the size of catalyst particles on a solid surface, their electronic properties and their ability to speed chemical ...
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.
Researchers make key step towards turning methane gas into liquid fuel
Oct 22, 2009 |
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(PhysOrg.com) -- Researchers at the University of Washington and the University of North Carolina at Chapel Hill have taken an important step in converting methane gas to a liquid, potentially making it more useful as a fuel ...
A step toward better brain implants using conducting polymer nanotubes
Nanotechnology / Nanomaterials
Sep 29, 2009 |
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ANN ARBOR, Mich.---Brain implants that can more clearly record signals from surrounding neurons in rats have been created at the University of Michigan. The findings could eventually lead to more effective ...
Could salt crusts be key ingredient in cooking up prebiotic molecules?
Space & Earth / Earth Sciences
Sep 18, 2009 |
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German scientists investigating the complex chemical mixture thought to be present in the early Earth’s oceans have found that amino acids can be 'cooked' into many other important chemical building blocks ...
Researcher uses bacteria to make radioactive metals inert
Sep 08, 2009 |
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The Lost Orphan Mine below the Grand Canyon hasn't produced uranium since the 1960s, but radioactive residue still contaminates the area. Cleaning the region takes an expensive process that is only done in ...
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.
More than meets the eye: New blue light nanocrystals
Nanotechnology / Nanomaterials
Jul 21, 2009 |
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Berkeley Lab researchers have produced non-toxic magnesium oxide nanocrystals that efficiently emit blue light and could also play a role in long-term storage of carbon dioxide, a potential means of tempering ...
'Holey' Nanosheets for Wastewater Dye Removal
Nanotechnology / Nanomaterials
Jul 01, 2009 |
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(PhysOrg.com) -- Researchers have discovered that extremely thin sheets of nickel oxide with hexagonally shaped holes can absorb hazardous dyes from wastewater nearly as well as the best traditional methods, but are recyclable. ...
Power thrust for spider silk
Apr 24, 2009 |
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(PhysOrg.com) -- Spiderman would definitely have an easier time of things with this spider silk - for example, if he had to stop a getaway car moving off at 100 kilometres per hour. A five-millimetre-thick ...
Dutch chemists make new chiral palladium metal
Apr 23, 2009 |
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Researchers at the University of Amsterdam (UvA) have succeeded in making the first ever piece of chiral palladium metal. The findings, by a research team led by Gadi Rothenberg, professor of Heterogeneous Catalysis and Sustainable ...
