Sentences with phrase «quantum wires»

Such a structure should have the necessary tiny quantum wires, though at the time there was no direct evidence for them.

These materials are made up of quantum wires that are between 2 and 3 nanometres wide, and because the width of the wires has an important effect on the time it takes luminescence to decay, wires thinner than 1.5 nanometres will be needed before nanosecond times are possible.

Last December, at a meeting of the Materials Research Society, electron microscopy images presented by Tony Cullis from DRA Malvern — his images of two years before had revealed quantum wires in freshly etched porous silicon — showed that although most of the silicon skeleton is consumed by high temperature oxidation, isolated crystallites do remain in luminescent layers.

The angle I've been devoting my efforts to is a new kind of conducting cable made of what are called armchair quantum wires: single - walled carbon nanotubes [buckytubes] with a particular structure.

An obvious problem remains before the trenches — or their walls — can be turned into mass - produced quantum wires: controlling the meandering tin droplets so they form straighter paths.

Researchers have taken yet another step toward creating super-tiny circuits using nanotubesthose miniature straws of pure carbon that can conduct electricity, mimic transistors, act as quantum wires and perform a number of other neat electrical tricks.

Teleportation is just a fancy quantum wire.

The narrowest silicon quantum wire possible, one atom wide, would be a silicon polymer called polysilane (SiH2) n, which emits efficiently in the near ultraviolet, and decays in a matter of million millionths of a second (picoseconds).

The quest to find Majorana quasiparticles in thin quantum wires began in 2001, spurred by Alexei Kitaev, then a physicist then at Microsoft Research.

Structures much smaller than this are beyond the reach of current technology, so I was intrigued by the idea that highly porous silicon was nothing other than a dense forest of quantum wires.

Now materials scientists are dreaming of the next step in electron confinement — quantum wires, which would trap electrons in one dimension and lead to even more efficient lasers, for example.

Such «quantum wires» could lead to improved sensing devices or lasers.

Like adherents of the quantum wire theory, they believe that the enlarged bandgap of porous silicon is a quantum size effect.

A 4 - nanometre wire of silicon, about 20 000 times thinner than a human hair, is called a «quantum wire», since the carriers within it are strongly confined in two dimensions but free to move long distances in the third dimension, along the wire.

They were partly inspired by studies on the confinement of electrons in tiny structures within semiconductors called quantum wells, quantum wires and quantum dots («How to build better lasers», New Scientist, 11 January).

Our group at Malvern envisages the luminescence as occurring in quantum wires of undulating thickness.

The quantum wires are not of an even thickness, and the width of the bandgap varies along the length of the wire, so excited electrons and holes tend to fall back into the thickest parts of the wire, which have the smallest band gaps.

One of the most fascinating areas of research in mesoscopic physics is the transport properties of one - dimensional (1D) quantum wires.