News tagged with copper oxide
Copper-nickel nanowires could be perfect fit for printable electronics
While the Statue of Liberty and old pennies may continue to turn green, printed electronics and media screens made of copper nanowires will always keep their original color.
10 hours ago |
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Defects make catalysts perfect
There is now one less mystery in chemical production plants. For many decades industry has been producing methanol on a large scale from a mixture of carbon dioxide and carbon monoxide, as well as hydrogen. ...
Apr 26, 2012 |
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Copper chains: Study reveals Earth's deep-seated hold on copper
Earth is clingy when it comes to copper. A new Rice University study this week in the journal Science finds that nature conspires at scales both large and small -- from the realms of tectonic plates down t ...
Space & Earth / Earth Sciences
Apr 05, 2012 |
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Ultrafast laser pulses shed light on elusive superconducting mechanism
An international team that includes University of British Columbia physicists has used ultra-fast laser pulses to identify the microscopic interactions that drive high-temperature superconductivity.
Mar 29, 2012 |
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Study reveals switching mechanism in promising computer memory device
(PhysOrg.com) -- Sometimes knowing that a new technology works is not enough. You also must know why it works to get marketplace acceptance. New information from the National Institute of Standards and Technology ...
Feb 22, 2012 |
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Copper iodide nanoparticles effective against 2009 pandemic H1N1 influenza virus
Copper-iodide nanoparticles have long-lasting antiviral activity against the 2009 pandemic H1N1 influenza virus, according to a paper in the February issue of the journal Applied and Environmental Microbiology.
Nanotechnology / Bio & Medicine
Feb 15, 2012 |
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Nanoparticles used to increase thermal properties of transformer oil
Rice University scientists have created a nano-infused oil that could greatly enhance the ability of devices as large as electrical transformers and as small as microelectronic components to shed excess heat.
Nanotechnology / Nanomaterials
Feb 01, 2012 |
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Researchers invent a switch that could improve electronics
Researchers at the University of Pittsburgh have invented a new type of electronic switch that performs electronic logic functions within a single molecule. The incorporation of such single-molecule elements could enable ...
Dec 01, 2011 |
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Explosive composite based on nanoparticles and DNA could be an energy source for embedded microsystems
A solid explosive with an energy density equivalent to that of nitroglycerine: this is the composite material produced by researchers at the Laboratoire d'Analyse et d'Architecture des Systemes (CNRS) in Toulouse, France, ...
Nanotechnology / Nanomaterials
Nov 03, 2011 |
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Copper nanowire films could lower touch screen, LED and solar cell costs
Copper nanowires may be coming to a little screen near you. These new nanostructures have the potential to drive down the costs of displaying information on cell phones, e-readers and iPads, and they could ...
Nanotechnology / Nanomaterials
Sep 26, 2011 |
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Ultrathin copper-oxide layers behave like quantum spin liquid
(PhysOrg.com) -- Magnetic studies of ultrathin slabs of copper-oxide materials reveal that at very low temperatures, the thinnest, isolated layers lose their long-range magnetic order and instead behave like ...
Jun 10, 2011 |
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Scientists looking to burst the superconductivity bubble
(PhysOrg.com) -- Bubbles are blocking the current path of one of the most promising high temperature superconducting materials, new research suggests.
May 16, 2011 |
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Black holes: a model for superconductors?
Black holes are some of the heaviest objects in the universe. Electrons are some of the lightest. Now physicists at the University of Illinois at Urbana-Champaign have shown how charged black holes can be ...
Mar 02, 2011 |
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'Incoherent excitations' govern key phase of superconductor behavior
New research by University of British Columbia physicists indicates that high-temperature superconductivity in copper oxides is linked to what they term 'incoherent excitations'--a discovery that sheds light on the electronic ...
Oct 14, 2010 |
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Roller coaster superconductivity discovered
Superconductors are more than 150 times more efficient at carrying electricity than copper wires. However, to attain the superconducting state, these materials have to be cooled below an extremely low, so-called ...
Aug 18, 2010 |
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Copper oxide
There are two stable copper oxides, copper(II) oxide (CuO) and copper(I) oxide (Cu2O).
Copper(I) oxide or cuprous oxide (Cu2O) is an oxide of copper. It is insoluble in water and organic solvents. Copper(I) oxide dissolves in concentrated ammonia solution to form the colorless complex [Cu(NH3)2]+, which easily oxidizes in air to the blue [Cu(NH3)4(H2O)2]2+. It dissolves in hydrochloric acid to form HCuCl2 (a complex of CuCl), while dilute sulfuric acid and nitric acid produce copper(II) sulfate and copper(II) nitrate, respectively.
Copper(I) oxide is found as the mineral cuprite in some red-colored rocks. When it is exposed to oxygen, copper will naturally oxidize to copper(I) oxide, but this takes extensive time. Artificial formation is usually accomplished at high temperature or at high oxygen pressure. With further heating, copper(I) oxide will form copper(II) oxide.
Formation of copper(I) oxide is the basis of the Fehling's test and Benedict's test for reducing sugars which reduce an alkaline solution of a copper(II) salt and give a precipitate of Cu2O.
Cuprous oxide forms on silver-plated copper parts exposed to moisture when the silver layer is porous or damaged; this kind of corrosion is known as red plague.
Copper(II) oxide or cupric oxide (CuO) is the higher oxide of copper. As a mineral, it is known as tenorite.
For more information about Copper oxide, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
