Carbon-based fairly than silicon-based transistors may velocity up computing speeds and cut back the facility consumption of gadgets comparable to computer systems, cell phones and the like.
[תרגום מאת ד”ר משה נחמני]
Picture of a scanning tunneling microscope of a narrow-striped steel graphene nano-strip. The white spots discuss with single-electron-populated orbitals which are rigorously organized to provide long-range conductive states. The width of this strip is just one.6 nanometers. [באדיבות: Daniel Rizzo מאוניברסיטת ברקלי]
A group of chemists and physicists from the College of California at Berkeley has succeeded in creating probably the most superior device within the area of transistors – a metallic wire made totally of carbon. “Exercise with the identical materials, that’s, carbon-based supplies, is what makes it potential to develop this expertise now,” explains Felix Fischer, a professor of chemistry on the College of Berkeley, including that the manufacturing of all electrical circuit elements from the identical materials simplifies the manufacturing course of.
Steel wires – just like the steel wires used to attach transistors in a pc chip – transmit electrical present from one machine to a different and likewise join the semiconductor elements contained in the transistors, the identical constructing blocks of computer systems.
A analysis group from the College of Berkeley has been researching for a number of years the best way to make semiconductors and insulators from graphene nano-strips, that are slender, one-dimensional stripes product of monoatomic graphene, a construction made up totally of carbon atoms organized in a sample of linked hexagons.
The revolutionary carbon-based steel can also be a graphene nano-strip, nevertheless it’s designed in order that it may be used primarily for electron move between semiconductor nan-strips in transistors product of carbon solely. The nano-strips of steel had been constructed by combining smaller and an identical constructing blocks – in a ‘down-up design’ strategy, notes one of many researchers. Every of the constructing blocks contributes a single electron able to transferring freely alongside the nano-strip.
Though different carbon-based supplies – comparable to graphene-wide two-dimensional sheets and carbon nanotubes – may be metallic, they’ve their drawbacks. A two-dimensional sheet design for nanometer strips, for instance, spontaneously turns it right into a semiconductor materials, and even, in some circumstances, an insulating materials. Carbon nanotubes, that are wonderful conductors, can’t be manufactured on the identical ranges of precision and flats in giant portions. “Nano-strips enable us chemical entry to a variety of constructions produced in a down-up strategy, which isn’t but potential with nano-tubes,” the researcher explains. “This truth truly allowed us to attach electrons collectively for the manufacturing of a steel nano-strip, one thing that has not been finished earlier than. This is without doubt one of the largest challenges within the area of graphene nano-strip expertise, and the truth that we’re so enthusiastic about our findings ”.
“We imagine that the steel wires are certainly a breakthrough; That is the primary time ever that we’re in a position to create a very slender steel conductor that features as a wonderful conductor, and all this from carbon-only supplies, with out the necessity for exterior shear, ”explains the lead researcher.
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