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Archive for the 'Molecular Electronics' Category

Negative resistance

Posted by J. Storrs Hall on May 21st, 2009

If you connect a 12-volt battery to a 4-ohm lamp, 3 amps of current will flow through the circuit by Ohm’s Law, V=IR. Power = VI = 36 watts will be dissipated by the lamp. If you add a 2-ohm resistor in series with the lamp, the resistances add to 6 ohms, the current is [...]

Anisotropic semi-Dirac electrons in atomically-precise trilayers

Posted by J. Storrs Hall on May 6th, 2009

In Arthur C. Clarke’s classic SF novel Against the Fall of Night, there is a description of the “moving ways”, the powered sidewalks on which people rode around the city, as being made of a material that would have baffled an engineer of our own times because it was solid in one direction and liquid [...]

A nanotechnology route to quantum computers through hybrid rotaxanes

Posted by Jim Lewis on March 27th, 2009

A major advance in molecular machine fabrication allows the construction of rotaxane molecular shuttles in which organic and inorganic components are mechanically linked in the same molecular structure.

Making energy transfer in solar cells more efficient

Posted by Jim Lewis on February 2nd, 2009

Canadian scientists have discovered how chemical structure can elicit a quantum state that permits the ultrafast movement of energy along an organic polymer.

New organic synthesis to provide nanotechnology a way to make structurally pure carbon nanotubes

Posted by Jim Lewis on January 9th, 2009

The synthesis and characterization of molecules called cycloparaphenylenes could provide nanotech with an efficient way of producing armchair carbon nanotubes of pre-determined diameter.

Toward atomic-scale computing with nanotechnology

Posted by Jim Lewis on December 31st, 2008

Christian Joachim (who shared the Foresight Nanotech Institute Feynman Prize in the Experimental category in 1997 and won in the Theoretical category in 2005) is heading a group of researchers working to bring about atomic-scale computing. ScienceDaily led us to this European Commission ICT Results feature “Computing in a molecule“, which describes their on-going efforts: [...]

Graphitic memory

Posted by J. Storrs Hall on December 22nd, 2008

A recent paper from Feynman Prize winner James Tour’s group at Rice relates an interesting new form of memory based on a bistable 2-terminal graphitic switch. Once developed, the switch could form the basis of a high-density non-volatile storage which might replace flash devices (which are already beginning to replace magnetic disks). Rice press release

STM brings near-atomic resolution to graphene nanotechnology

Posted by Jim Lewis on 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.

Multiple nanotechnology paths lead to harvesting solar energy

Posted by Jim Lewis on August 26th, 2008

Two stories today in ScienceDaily point to different nanotech applications that could enable a solar solution to our energy problems.

Nanotechnology produces highly conductive, single-molecule junction between electrodes

Posted by Jim Lewis on August 13th, 2008

Nanotech has taken a major step along the road to molecular electronics with the demonstration that one molecule of benzene can form a highly conductive junction between two platinum electrodes.

Toward atomically precise graphene structures for nanotechnology

Posted by Jim Lewis on August 4th, 2008

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

Nanotechnology for inexpensive plastic memory

Posted by Jim Lewis on June 24th, 2008

A new concept for a very cheap plastic nanotech memory has been developed by combining the favorable properties of ferroelectrics and semiconductors.

New measurements of charge dynamics of graphene may guide potential nanotechnology applications

Posted by Jim Lewis on June 11th, 2008

Very precise measurements confirmed many of the unusual effects theoretically predicted for graphene, but they also revealed effects of unanticipated additional interactions, which are not yet understood.

New memory technology made possible by nanotechnology

Posted by Jim Lewis on May 1st, 2008

Nanotechnology has provided a fourth fundamental two-terminal passive element for electronic circuits.

Graphene looks more and more like the ideal material for nanotech transistors

Posted by Jim Lewis on April 22nd, 2008

Graphene has now been shown to retain essential properties when used to make transistors at the one-nanometer-scale.

Nanotechnology produces molecular switches that might lead to petabyte electronic memory

Posted by Jim Lewis on April 18th, 2008

Nanotechnology using a molecular-scale switch could enable storing half a petabyte on one square inch.

Highest intrinsic electron mobility advances nanotechnology prospects for graphene

Posted by Jim Lewis on March 26th, 2008

Advancing the case for graphene in nanotech is the recent demonstration that the intrinsic mobility of electrons in graphene is much greater than in silicon or in any other conventional semiconductor.

Adapting nanotechnology to conventional silicon microtechnology

Posted by Jim Lewis on March 21st, 2008

Researchers have assembled molecular films on the Si(100) surface utilized in conventional CMOS technologies and shown them to be of comparable quality to those assembled in earlier studies on the Si(111) surface, which is not compatible with CMOS.

Less noise with nanotechnology devices using two atomic layers of graphene

Posted by Jim Lewis on March 17th, 2008

IBM announced (credit that stacking two layers of graphene—one on top of the other—reduces noise that has bedeviled attempts to build nanoelectronic circuits from graphene. From “IBM Scientists ‘Quiet’ Unruly Electrons in Atomic Layers of Graphite“: [IBM researchers] today announced a discovery that combats one of the industry’s most perplexing problems in using graphite [...]

Building chips with DNA nanotechnology

Posted by Jim Lewis on February 26th, 2008

Researchers at IBM are developing DNA nanotechnology to assemble nanoelectronic components into arrays in a bid to replace current lithographic methods of making computer chips.