Sentences with phrase «electrical conductivities of»

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?

These include instruments that make measurements of temperatures, magnetic fields, and electrical conductivity of the comet surface.

This fatty substance ensures electrical conductivity of the nerve fibers.

The electrical conductivity of the material provided another hint of superionic ice: The level of conductivity was consistent with expectations for that phase of matter.

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

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 size.

This is because the electrical conductivity of graphene drops as soon as foreign molecules bind to it.

«The modification of bacterial cells with polypyrrole is anticipated to improve the electrical conductivity of bacterial cells without reducing their viability,» the authors explained.

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.

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

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

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.

TDS meters measure the electrical conductivity of the solution, not silver content.

«Some Experiments Relating to the Electrical Conductivity of the Lower Atmosphere.»

After only a 15 - minute video interview with married couples who are hooked up to monitors that measure heart rate and electrical conductivity of the skin, The Gottman's can predict with over 90 % accuracy whether the marriage is likely to end in divorce.

Not exact matches

Le, Do, and the research team pulled an all nighter; they took turns wearing a standard electrode cap — sort of like a bathing cap coated inside with gel to improve electrical conductivity — while watching movies, listening to jokes, arguing, and more, all while a graph on the screen tracked excitement.

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.

«The same factors which affect electrical conductivity ─ temperature, water content, and the presence of molten material (magma) ─ also affect the viscosity or strength.

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.

«The same factors that affect electrical conductivity — temperature, water content and the presence of molten material — also affect the viscosity or strength.

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.

Along with the change of venue, researchers plan to try out one of Phoenix's yet - to - be-deployed toys — a thermal and electrical conductivity probe, which consists of three spikes attached to the robotic arm's «knuckle.»

Chua's equations suggested that a memristor's electrical resistance, or conductivity, would not be constant, like a lightbulb's, but dynamic, and determined by the history of the current that had flowed through the device.

The dramatic conductivity and low electrical resistance of Dirac semimetals may be key to potential applications, including «quantum electricity generators» and quantum computing, Li said.

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.

Many people picture electrical conductivity as the flow of charged particles (mainly electrons) without really thinking about the atomic structure of the material through which those charges are moving.

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.

At CNMS, Ming - Wei Lin and Kai Xiao measured physical properties, including electrical conductivity, of various promising 2D materials.

The heart of the device is a microscopic sandwich of quantum wells — crystalline films of semiconductors only a few billionths of a meter thick, each with a different electrical conductivity.

«The great properties of nanodiamond — lubricity, high thermal conductivity and electrical resistivity and stability, among others — are quite impressive,» said Taha - Tijerina.

Rice materials scientist Rouzbeh Shahsavari and alumnus Navid Sakhavand first built atom - level computer models of pillared graphene — sheets of graphene connected by covalently bonded carbon nanotubes — to discover their strength and electrical properties as well as their thermal conductivity.

Another set of sensors measure electrical conductivity, which Burger says can be used as a proxy for measuring nitrate.

Graphene is essentially an ultra-thin sheet of carbon and possesses exciting properties such as high mechanical stability and remarkable electrical conductivity.

Three images, left to right, of the same thundercloud depict a less - than -10-milliseconds-long sequence of events: (left) formation within the cloud of a small channel, or «leader,» of electrical conductivity (yellow line) with weak emission of radio signals (ripples), to (middle) a burst of both dark lightning (pink) and radio waves (larger ripples), to (right) a discharge of bright lightning and more radio waves.

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.

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.

Without stretching, printed traces of the new conductor recorded 4,972 siemens per centimeter (S / cm), high conductivity using the common measure for assessing electrical conductance.

New technology that could enhance both the electrical and thermal conductivity of conventional composite materials has been developed thanks to a collaboration between the University of Surrey, University of Bristol and the aerospace company Bombardier.

Less than two years ago, Kanatzidis and his team, with postdoctoral fellow Lidong Zhao as protagonist, identified tin selenide as a surprisingly good thermoelectric material; it is a poor conductor of heat (much like wood)-- a desirable property for a thermoelectric — while maintaining good electrical conductivity.

Oligothiophene (4T) and polythiophene (P3HT), two typical organic semiconductors, can be doped with a second type of molecule such as a strong electron acceptor (F4TCNQ) for example to control the electrical conductivity.

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.

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.

Historically, oceanographers have defined seawater based on its salinity, which they inferred by taking measurements of the water's electrical conductivity.