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Archive for the 'Molecular Electronics' Category

Promise and challenge on the road to practical graphene electronics

Posted by Jim Lewis on April 29th, 2011

Smaller, faster, cooler: graphene transistors show promise for practical analog signal processors, for magnetic memory devices, and for self-cooling electronic circuits.

Controlling the orientation and stretching of DNA attached to a surface

Posted by Jim Lewis on March 15th, 2011

A shear flow processing method has been developed to control the surface attachment and orientation of DNA molecules to use for DNA-organic semiconductor molecular building blocks.

Positional control of chemical reaction a step toward advanced nanotechnology

Posted by Jim Lewis on March 11th, 2011

A step toward advanced nanotechnology has been achieved by using attachment to a surface and confinement by surrounding molecules to make two molecules react to form a product that would not form if they were free to react in solution.

Atomically precise graphene nanotechnology

Posted by Jim Lewis on March 8th, 2011

Sputtering a pattern of zinc atoms on a graphene surface, followed by an acid rinse to remove the zinc, also removes exactly one atomic layer of graphene from where ever the graphene was covered with zinc atoms, forming a pattern on the graphene surface that is atomically precise in the vertical dimension. Resolution in the horizontal dimensions is determined by the mask used to sputter zinc.

Mechanical control of conductance through a single molecule junction

Posted by Jim Lewis on February 20th, 2011

New options to control nanoelectronic systems may arise from the demonstration that mechanical manipulation can control conductance through single molecule electrode junctions.

More on first programmable nanoprocessor

Posted by Jim Lewis on February 14th, 2011

James C. Ellenbogen writes to provide insight and personal perspective on the world’s first programmable nanoprocessor, achieved as the product of a collaboration between Harvard and MITRE, with the team at MITRE comprising Shamik Das, James Klemic, and Ellenbogen.

First programmable nanowire circuits for nanoprocessors

Posted by Jim Lewis on February 9th, 2011

Researchers at Harvard and MITRE have produced the world’s first programmable nanoprocessor

Researchers Develop method to Distinguish Classical from Quantum Behavior in Electrons

Posted by Jim Lewis on December 23rd, 2010

Sometimes the behavior of electrons in nanostructures can be modelled using classical laws of motion, while at other times more computationally challenging quantum methods are necessary to obtain useful results. Christopher W. Ince of the Nanotechnology Research Foundation writes with news of a new method to distinguish classical from quantum behavior in electrons: Researchers from [...]

Molecular building blocks form three-dimensional structures on surfaces

Posted by Jim Lewis on November 27th, 2010

The formation of a supramolecular bilayer is induced by buckyball guest molecules.

Project launched to create and test a molecular-sized processor chip

Posted by Jim Lewis on November 23rd, 2010

Singapore and European Union launch project to create and test a molecular-sized processor chip.

How graphene could complement or replace silicon in electronic applications

Posted by Jim Lewis on 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 research wins Physics Nobel for European nanotechnologists

Posted by Jim Lewis on October 7th, 2010

Unique properties of two-dimensional arrays of carbon atoms promise both immediate applications and advantages for the development of advanced nanotechnology.

Singapore pursues Atom Technology & atomically precise manufacturing

Posted by Christine Peterson on July 6th, 2010

Nanotechnology Now brings news of a recent Atom Technology workshop in Singapore featuring dual Foresight Institute Feynman Prize winner Christian Joachim, Feynman Prize founder Jim Von Ehr of Zyvex Labs and Zyvex Asia, and Foresight Roadmap participant Damian Allis of Syracuse University: Atom Technology is IMRE’s flagship program led by well known scientist Prof. Christian [...]

Scientists Create World’s First Molecular Transistor

Posted by J. Storrs Hall on December 24th, 2009

Scientists Create World’s First Molecular Transistor. Very nice writeup of the research over at Next Big Future. To my mind what’s new here isn’t the transistor per se — semiconducting and conductive states have been known in CNTs for over a decade, and FET and diode-like arrangements of them have been around for the same. [...]

Technology Review: Complex Integrated Circuits Made of Carbon Nanotubes

Posted by J. Storrs Hall on December 17th, 2009

Technology Review: Complex Integrated Circuits Made of Carbon Nanotubes. The first three-dimensional carbon nanotube circuits, made by researchers at Stanford University, could be an important step in making nanotube computers that could be faster and use less power than today’s silicon chips. Such a computer is still at least 10 years off, but the Stanford [...]

Nanotechnology researchers find reliable, mess-free way to grow graphene

Posted by J. Storrs Hall on November 10th, 2009

Nanotechnology researchers find reliable, mess-free way to grow graphene. from nanowerk   “You can imagine trying to peel a piece of shrink wrap off a dish to put it on a new dish — it’s going to be messy,” said lead researcher Jiwoong Park, Cornell assistant professor of chemistry and chemical biology. Inspired by previous [...]

Potential leap forward in electron microscopy

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

Potential leap forward in electron microscopy. from Eurekalert. Why it matters: A non-invasive electron microscope could shed light on fundamental questions about life and matter, allowing researchers to observe molecules inside a living cell without disturbing them. If successful, such microscopes would surmount what Nobel laureate Dennis Gabor concluded in 1956 was the fundamental limitation [...]

Hardware –> Software

Posted by J. Storrs Hall on May 25th, 2009

An interesting question was posed to my “Do the math” post of last week: What does this have to do with nanotechnology? A little history helps, as usual. Eniac plugboard: Hardware or software?

Memories: nanotech?

Posted by J. Storrs Hall on May 22nd, 2009

Some interesting developments in memories: This Nanowerk story reports results out of Alex Zettl’s group at Berkeley on a memory cell that consists of an iron nanoparticle which can be moved back and forth in a nanotube. More information on this can be found at Zettl’s site here. This memory, like someother nanotech schemes, relies [...]

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 [...]