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Precisely removing individual atoms with microscope creates novel molecule

Friday, March 3rd, 2017

A molecule with two unpaired electrons too unstable to be made by chemical synthesis was fabricated using a scanning probe microscope to remove two hydrogen atoms from a single molecule adsorbed to a copper surface at ultra low temperature and ultra high vacuum.

Cleanly placing atomically precise graphene nanoribbons

Monday, January 23rd, 2017

Atomically precise chevron-shaped graphene nanoribbons were purified after solution synthesis, cleanly placed by dry contact transfer on a hydrogen-passivated Si surface, imaged and manipulated by scanning tunneling microscopy, and covalently bonded to depassivated surface positions.

Atomically precise boron doping of graphene nanoribbons

Monday, September 28th, 2015

The ability to dope graphene nanoribbons with boron atoms to atomic precision opens a range of possible new applications, from chemical sensing to nanoelectronics to photocatalysis to battery electrodes.

Graphene nanoribbon senses passage of individual bases of DNA

Tuesday, November 19th, 2013

A nanoribbon transistor no thicker than the distance between adjacent DNA bases provides high resolution sensing of DNA passage through nanopores, perhaps leading eventually to rapid DNA sequencing.

Circuits of graphitic nanoribbons grown from aligned DNA templates

Tuesday, September 17th, 2013

How complex could circuits be made using precisely positioned DNA nanostructures as templates to grow graphene nanoribbons?

How graphene could complement or replace silicon in electronic applications

Monday, November 22nd, 2010

A review article presents the amazing features of graphene and discusses how it might complement or replace silicon for the fabrication of electronic devices.

Graphene transistor roundup

Monday, February 8th, 2010

Phaedon Avouris, winner of the Feynman Prize in 1999, is head of the nanoscale science and technology group At IBM, which has recently reported significant advances in synthesizing transistors from graphene using conventional lithography methods. IBM Demonstrates Graphene Transistor Twice as Fast as Silicon Graphene transistors promise 100GHz speeds Graphene Transistors that Can Work at [...]

Better ways to produce graphene nanoribbons for nanotechnology applications

Wednesday, April 22nd, 2009

Two research groups have published two different ways to unzip carbon nanotubes to create graphene ribbons.

Graphene edges closer to atomically precise nanotechnology

Wednesday, April 15th, 2009

Two papers in a recent issue of Science suggest that graphene is rapidly moving from being “just” a nanotech wonder material to becoming relevant to atomically precise nanotechnologies.

STM brings near-atomic resolution to graphene nanotechnology

Monday, October 6th, 2008

The recent demonstration of the ability to “fully engineer the electronic band gap of graphene” is a major advance in the top-down approach to nanotech applications that take advantage of the many marvelous properties of graphene.

Toward atomically precise graphene structures for nanotechnology

Monday, August 4th, 2008

Researchers have demonstrated atomically precise cuts through a few graphene layers.

Nanotechnology demonstration of room-temperature graphene transistors

Monday, June 2nd, 2008

In yet another step toward making nanotech transistors from graphene nanoribbons, chemically-prepared graphene nanoribbons less than 10 nm wide were found to be uniformly room-temperature, field-effect transistors.

Directing Light in Photonics Using Nanoribbons

Tuesday, January 11th, 2005

BuffYoda writes "BERKELEY, CA — "Another important step towards realizing the promise of lightning fast photonic technology has been taken by scientists with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley. Researchers have demonstrated that semiconductor nanoribbons, single crystals measuring tens of hundreds of microns in length, but only a few hundred or less nanometers in width and thickness (about one ten-millionth of an inch), can serve as 'waveguides' for channeling and directing the movement of light through circuitry." An interesting (though by no means unexpected or revolutionary) development in photonics, a field I consider to be of great importance to the development of extremely fast computers (this route seems to be a lot closer than the alternatives)."