Sentences with phrase «oxide materials»
"Oxide materials" refers to substances that are composed primarily or predominantly of oxygen and another element, usually a metal. These materials are known for their various properties and uses, such as being good conductors of electricity, being heat resistant, and displaying magnetic or optical properties. Examples of oxide materials include rust, which is iron oxide, and quartz, which is silicon dioxide. Full definition
That also helped increase the efficiency, and allows the use of a variety of oxide materials.
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Transition metal and complex oxide materials exhibit a range of properties unparalleled by any other class of materials.
Several oxide materials contain transition metals, which can easily exchange electrons.
The thinnest superconductor yet is a layer of copper oxide material less than a nanometre thick.
So Cola, NSF Graduate Research Fellow Erik Anderson and Research Engineer Thomas Bougher replaced the calcium with aluminum and tried a variety of oxide materials on the carbon nanotubes before settling on a bilayer material composed of alumina (Al2O3) and hafnium dioxide (HfO2).
A magnetic oxide material incorporated into the nanoparticles could allow the assemblies to be directed to a tumor site by an external magnet, and could also support diagnostic imaging.
A composite thin film made of two different inorganic oxide materials significantly improves the performance of solar cells, as recently demonstrated by a joint team of researchers led by Professor Federico Rosei at the Institut national de la recherche scientifique (INRS), and Dr. Riad Nechache from École de technologie supérieure (ÉTS), both in the Montreal Area (Canada).
And it shows that simple oxide materials like alumina can trigger carbon - carbon bond formation from methanol derivatives, thus opening new avenues for the upgrading of methanol into long chain hydrocarbons.»
The team is now using this strategy, called a Metal - Embedded - in - Oxygen - Matrix (MEOM), to predict the best oxide material — either copper or something new — to place next to the neutral copper strips to achieve the fastest reaction.
They systematically scanned the copper - oxide material under various levels of doping to see how the arrangements and behavior of the electrons changed as the material evolved.
Jonathan Petrie led the epitaxial synthesis of strained oxide materials and catalytic testing, and Tricia Meyer assisted thin film deposition using a technique that employs a high - power excimer laser to vaporize material and deposit it as high - quality thin films under precisely controlled conditions.
Right now, even these «high - temperature» copper - oxide materials operate as superconductors only when cooled to below -100 degrees Celsius.
Disappearing stripes linked with free electron movement: Scientists used a precision microscope to simultaneously explore electrons» arrangements and movements as charge carriers called holes were added to transform a copper - oxide material from an insulator to a superconductor.
Instead of fully eliminating the aberrations in the electron microscope, the researchers purposely added a type of aberration, called four-fold astigmatism, to collect atomic level magnetic signals from a lanthanum manganese arsenic oxide material.
Swearer said the chemical industry already uses aluminum oxide materials that are dotted with palladium islands to catalyze reactions, but the palladium in those materials must be heated to high temperatures to become an efficient catalyst.
Researchers at Aalto University in Finland have visualized how oxygen ion migration in a complex oxide material causes the material to alter its crystal structure in a uniform and reversible fashion, prompting large modulations of electrical resistance.
Copper oxide materials become superconducting when an optimal number of electrons are removed, leaving positively charged «holes,» and the material is chilled below a transition temperature (blue curve).
The system relies on oxide materials similar to those used in many of today's rechargeable batteries, in that ions move in and out of the material during charging and discharging cycles.
Understanding how these properties change is critical to using them to improve technologies, and crystalline film growth using dopants is an ideal means of making model oxide materials.
This computational effort carved out specific regions of the vast metal oxides materials space, which could be rapidly evaluated using high - throughput experimentation synthesis and screening techniques.
It's expensive stuff though, so tiny platinum nanoparticles sitting on cheap metal oxide materials are used to convert harmful carbon monoxide into carbon dioxide.
This has been demonstrated by preparing more complex materials, such as lithium cobalt oxide — a cathode material for lithium batteries; bismuth manganese oxide — a multiferroic material; and a 90 degrees Kelvin (K) superconducting Yttrium barium copper oxide material.
It means individual nanoscale regions in complex oxide materials can behave as self - organized circuit elements, which could support new multifunctional types of computing architectures.
But she adds that the theoretical approach they took will now be applied much more broadly, to many other kinds of oxide materials and to other kinds of defects within them besides the neutral oxygen vacancies.
Traditional perovskites are typically metal - oxide materials that display a wide range of fascinating electromagnetic properties, including ferroelectricity and piezoelectricity, superconductivity and colossal magnetoresistance.
Japanese researchers have identified an oxide material that may soon greatly improve the storage capacity of hard disks and magnetic tapes.
In the copper - oxide material, instead of raising the temperature, the scientists raise the level of doping to «melt» the density waves at a particular «critical point.»
In their native state, even at super chilly temperatures, the copper - oxide materials are actually strong insulators.
Oxide materials are workhorses of energy generation and storage.
In the experiments, researchers used a technique called angle - resolved photoemission spectroscopy, or ARPES, to knock electrons out of a copper oxide material, one of a handful of materials that superconduct at relatively high temperatures — although they still have to be chilled to at least minus 135 degrees Celsius.
These metal oxide materials have been investigated by many researchers, Yildiz says, and «their properties are highly governed by the number and the kind of defects that are present.»
Whether the ions are lithium ions, in the case of lithium ion batteries, or oxygen ions, in the case of the oxide materials, their reversible motion causes the material to expand and contract.
«These metal oxide materials are everywhere, and water is everywhere,» Mavrikakis says.
By coupling these oxide materials with other materials whose dimensions remain constant, it is possible to make actuators that bend when the oxide expands or contracts.
While they demonstrated the process using one particular oxide compound, the researchers say the findings could apply broadly to a variety of oxide materials, and even to other kinds of ions in addition to oxygen, moving in and out of the oxide layer.
The study, featured on the cover of Advanced Electronic Materials, shows that a single crystal complex oxide material, when confined to micro - and nanoscales, can act like a multi-component electrical circuit.
It demonstrated that the superconducting state in copper - oxide materials is quite unusual, challenging the standard understanding.
The ORNL study published in the journal Small demonstrates how scanning transmission electron microscopes, normally used as imaging tools, are also capable of precision sculpting of nanometer - sized 3 - D features in complex oxide materials.
An international team led by scientists from the Department of Energy's SLAC National Accelerator Laboratory and Stanford University has detected new features in the electronic behavior of a copper oxide material that may...