Sentences with phrase «on bismuth»

The scientists focused on bismuth vanadate, a thin - film semiconductor that has emerged as a leading candidate for use as a photoanode, the positively charged part of a photoelectric cell that can absorb sunlight to split water.

This is competitive with conventional TE materials based on bismuth telluride.

«Compounds based on bismuth, antimony, telluride and selenide are the cleanest and most intrinsic topological insulators demonstrated so far, with no measurable amount of undesirable conduction inside the bulk that often spoils the topological conduction properties in earlier topological insulator materials,» Chen said.

Not exact matches

Fortune is currently focused on advancing the vertically integrated NICO cobalt - gold - bismuth - copper project, comprised of a proposed mine and mill in the Northwest Territories that will produce a bulk concentrate for shipment to a refinery that the Company plans to construct in Saskatchewan.

Liu and his team found that bismuth metal deposited on the silicon can result in a more stable large - gap topological insulator.

But Bowyer plans instead on using a low - melting point metal alloy of bismuth, lead, tin and cadmium that can be squirted from a heated syringe to form circuits.

In a study whose results were published in Nature last July, physicist Ali Yazdani used a powerful microscope to track electrons as they encountered stairlike barriers on the surface of antimony, a material that shares several characteristics with topological insulators such as bismuth telluride.

Most existing thermoelectric devices are based on rare, expensive and unstable materials such as bismuth telluride, making them unsuitable for widespread use in energy generation — but Peidong Yang «s team at the University of California, Berkeley, have found a cheap alternative in silicon.

The image above reveals how electrons scatter on the surface of a bismuth - based material.

The researchers report finding a viable alternative in specially prepared bismuth ferrite film that has piezoelectric properties on par with lead - based compounds.

The material of their choice, the compound Ag2BiO3, is exceptional for two reasons; on the one hand it is composed of the heavy element bismuth, which allows the spin of the electron to interact with its own motion (spin - orbit coupling)-- a feature that has no analogy in classical physics.

«The high - pressure liquid becomes more structurally disordered when the heat is applied, taking on what we call a «deep liquid» state, certain structural characteristics of which remain even when the bismuth is cooled back to solid,» Shen explained.

The bismuth selenide / BSCCO material was brought to the ALS to study the electronic states on its surface using a technique known as ARPES, for angle - resolved photoemission spectroscopy.

«Our studies reveal a large superconducting pairing gap on the topological surface states of thin films of the bismuth selenide topological insulator when grown on BSCCO,» Fedorov says.

They came up with a compound that features sodium, which is cheap and abundant; bismuth, which is relatively scarce but is overproduced during the mining of other metals and is cheap; and sulfur, the fifth most common element on Earth.

But bismuth - based Zintl compounds haven't been widely studied, said Zhifeng Ren, MD Anderson Chair Professor of physics at the University of Houston and lead author on the paper.

In this research, Lawler and his colleagues focused on a member of the cuprate class of superconductors called bismuth strontium calcium copper oxide (BSCCO).

This also produced heavy elements that were not on earth before the flood (elements heavier than lead, such as bismuth, polonium, radon, radium, thorium, uranium, etc.) The greater the heat, the more heavy elements formed and absorbed that heat.

It is based on the principle that atomic nuclei have a magnetic field, if they, like the bismuth isotope under investigation, have a nuclear spin.

Although long thought to be stable, bismuth, as an element, was shown to be weakly radioactive, with an enormously long half - life period: 1 Watch Caiu na Net Video Caseiro Que Marido Corno Fe - free porn video on MecVideos

Depending on the circumstances of exposure, large enough doses of bismuth salicylate could cause effects similar to aspirin poisoning.

Larry Bell, Untitled 1964, bismuth, chromium, gold, and rhodium on gold - plated brass; Hirshhorn Museum and Sculpture Garden

Researchers at Stanford University, with colleagues in China, have developed a tandem solar cell consisting of an approximately 700 - nm - thick nanoporous Mo - doped bismuth vanadate (BiVO4)(Mo: BiVO4) layer on an engineered Si nanocone substrate.

While it is too soon to say if bismuth ferrite - based substances can replace lead entirely, there is potential, and the researchers are now working on figuring out which variables to tweak to maximize the film's piezoelectric potential.