Sentences with phrase «electrical conductivity in»

July 25, 2017 - Hydrogen at elevated temperature creates high electrical conductivity in the Earth's mantle.

By placing a very sharp conductive needle, of an atomic force microscope (AFM), on top of a zeolite crystal, the researchers were able to measure the electrical conductivity in the molecule chains.

Professor Wilfred van der Wiel, who developed and led the experiment, says that measuring the electrical conductivity in these molecular electric wires is a unique result in itself.

The recent report of electrical conductivity in the alkali metal fullerides and the discovery of superconductivity at 18 K for KxC60 has raised fundamental questions about the electronic states on either side of the Fermi level, their occupancy with K intercalation, and the mechanism of superconductivity.

Not exact matches

For example, when physicists explain the electrical conductivity of metals in terms of the «band structure» of the energy levels of the electrons in a crystal lattice of atoms, to which of the four causes does that correspond?

To illustrate, research has discovered that changes in our skin temperature and the degree of skin conductivity of small electrical impulses (both indications of our degree of general relaxation) are correlated with emotional changes.

For example, by measuring electrical conductivity or the spread of heat in the skin, it can monitor hydration, allowing it to spot early signs of heart problems marked by water retention.

Graphene is a two - dimensional (2D) one - atom - thick sheet of carbon crystals that has many extraordinary properties in terms of its strength, electrical and thermal conductivity, and optical transparency.

These electrodes must have a high surface area per unit weight, high electrical conductivity and capacitance and be physically robust so they do not degrade during operation in liquid or hostile environments.

The team determined that local electrical conductivity within the material directly depended on the shapes of the niobate octahedra in the layers.

«We find the conditions for brines to be produced, but if you want to measure them directly you need some other kind of measurement,» he says, such as an instrument that can look for changes in electrical conductivity.

Graphene, a two - dimensional form of carbon in sheets just one atom in thick, has been the subject of widespread research, in large part because of its unique combination of strength, electrical conductivity, and chemical stability.

Since graphene was experimentally discovered in 2004, it has been the focus of vigorous applied research due to its outstanding properties such as high specific surface area, good thermal and electrical conductivities, and many more properties.

Due to the combination of both materials, when bent, the electrical conductivity is greater all in all than in a layer that is made purely of conductive polymer or a layer made purely of metal nanoparticles.

They can be deformed in any direction, while still ensuring optimal electrical conductivity.

In the study, Professor Kim and his research team have developed a new catalyst, using the cation ordered double perovskite with high electrical conductivity and catalyic performance.

High electrical conductivity and large accessible surface area, which are required for ideal electrode materials in energy devices, are opposed to each other in current materials.

Semiconductors, which are used extensively in electronic circuitry, can have their electrical conductivity turned on and off — an obviously useful capability.

That, however, is just «one piece of the puzzle,» Chen says: In order to be useful for thermoelectric devices, a material must combine low thermal conductivity with high electrical conductivity.

Researchers of MESA +, the research institute for nanotechnology of the University of Twente, in cooperation with researchers of the University of Strasbourg and Eindhoven University of Technology, are the first to successfully create perfect one - dimensional molecular wires of which the electrical conductivity can almost entirely be suppressed by a weak magnetic field at room temperature.

The electrical conductivity of these polymers depends on their oxidation state — that is, the number of positive or negative charges in their polymer chains.

The material that Wang and his team created restores all properties needed for use as a dielectric in wearable electronics — mechanical strength, breakdown strength to protect against surges, electrical resistivity, thermal conductivity and dielectric, or insulating, properties.

In this manner stability and conductivity can be improved to such an extent that the material can be deployed not only as a blocking layer, but even as a transparent, electrical contact.

The discovery of graphene, with its high strength - to - weight ratio, flexibility, electrical conductivity, and ability to form an impenetrable barrier, led to an explosion of interest in 2D solids.

The scientists used two methods to prove that this pairing of a particular photo and pain was actually anchored in the test subjects» brains: The expectation of an electrical shock was demonstrated by increased cold sweat which was measured via skin conductivity.

Bismuth is a historically interesting element for scientists, as a number of important discoveries in the metal physics world were made while studying it, including important observations about the effect of magnetic fields on electrical conductivity.

In certain magnetic materials, the electrical conductivity of a thin layer of material changes in steps as a small magnetic field is varied, increasing and decreasing in jumps of a certain sizIn certain magnetic materials, the electrical conductivity of a thin layer of material changes in steps as a small magnetic field is varied, increasing and decreasing in jumps of a certain sizin steps as a small magnetic field is varied, increasing and decreasing in jumps of a certain sizin jumps of a certain size.

The technology patented by the UJI combines graphene and organometallic compounds in a single material without altering the most interesting properties of graphene, such as its electrical conductivity.

The study, published in Nature Materials, investigated the electrical conductivity of a solid electrolyte, a system of positive and negative atoms on a crystal lattice.

Electrical conductivity, a measure of how strongly a given material conducts the flow of electric current, is generally understood in terms of Ohm's law, which states that the conductivity is independent of the magnitude of an applied electric field, i.e. the voltage per metre.

These analyses showed that the iodine atoms in the carbon nanorings form extended polyiodide chains when stimulated by electricity, which gave the material electrical conductivity.

«Computer simulations reveal universal increase in electrical conductivity.»

Computer simulations have revealed how the electrical conductivity of many materials increases with a strong electrical field in a universal way.

The technique also improves the electrical conductivity that makes these films attractive for use in electronic and aerospace applications.

The graphene enhances the long range electrical conductivity of the anode and maintains a low resistance in a structurally stable composite.»

One of the difficulties involved in developing thermo - electric systems that convert heat into electric current is the need for materials exhibiting high electrical conductivity but low thermal conductivity, which is only possible with complicated crystal structures.

The study also shows that rock containing tiny amounts of carbon dioxide helps to make magma at extreme depths in the mantle, which in turns explains the melted rock's electrical conductivity, or ability to sustain an electric charge.

As a plasma, helium's electrons and protons are not bound together, resulting in very high electrical conductivity, even when the gas is only partially ionized.

Nature provides materials in which the electrical and thermal conductivity are strongly linked, resulting in a seeming limit to the achievable efficiency of a thermoelectric.

Dresselhaus demonstrated that in a one - dimensional structure, it is possible to separately adjust electrical and thermal conductivity, and that this should allow the creation of new generations of thermoelectric refrigerators and new ways of scavenging waste heat for useful purposes.

The study, reported today in the journal Nature Nanotechnology, presents the newest entry in a class of substances known as bicontinuous jammed emulsion gels, or bijels, which hold promise as a malleable liquid that can support catalytic reactions, electrical conductivity, and energy conversion.

Those that occur in nature are limited in their efficiency and utility by the strong links between their electrical and thermal conductivity.

A new technology developed by researchers in Italy and the United Kingdom allows for the creation of graphene - based materials that can be interfaced with neurons without losing its electrical conductivity.

To measure the amount of salt in seawater, for instance, they might measure how well the solution conducts electricity, since the higher the level of dissolved salt, the higher the electrical conductivity of the water.

The new material developed by the multidisciplinary research team is composed of collagen (the most abundant protein of the human body which has known regenerative potential and can support the body's cells) and graphene (the world's thinnest material which is known to have unique mechanical and electrical properties) resulting in an electroconductive «biohybrid» combining the beneficial properties of both materials — resulting in a material which is mechanically stronger, with increased electrical conductivity.

In numerous tests, the researcher and his team investigated the nano - material graphene, whose extremely high specific surface area of up to 2,600 m2 / g and high electrical conductivity practically cries out for use as an electrode material.

Honey contains electrolytes, in the form of acids and minerals, and exhibits varying degrees of electrical conductivity.

Measurements of the electrical conductivity are used to determine the quality of honey in terms of ash content.

The air - fuel mixture in an engine's cylinders has a certain electrical conductivity, which varies — especially as «knock,» or detonation, occurs in a cylinder.

In a related paper, published in April's Nature Materials, Merck Chemicals in the United Kingdom developed a new polymer whose electrical mobility, related to conductivity, is the highest so far in a polymer, endowing the new polymer with performance comparable to amorphous silicoIn a related paper, published in April's Nature Materials, Merck Chemicals in the United Kingdom developed a new polymer whose electrical mobility, related to conductivity, is the highest so far in a polymer, endowing the new polymer with performance comparable to amorphous silicoin April's Nature Materials, Merck Chemicals in the United Kingdom developed a new polymer whose electrical mobility, related to conductivity, is the highest so far in a polymer, endowing the new polymer with performance comparable to amorphous silicoin the United Kingdom developed a new polymer whose electrical mobility, related to conductivity, is the highest so far in a polymer, endowing the new polymer with performance comparable to amorphous silicoin a polymer, endowing the new polymer with performance comparable to amorphous silicon.