Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > UIC and Japanese chemists close in on molecular switch

Abstract:
The electronics industry believes that when it comes to circuits, smaller is better -- and many foresee a future where electrical switches and circuits will be as tiny as single molecules.

UIC and Japanese chemists close in on molecular switch

Chicago, IL | Posted on July 10th, 2007

Turning this dream into reality may be a step closer, thanks to a collaboration between chemists at the University of Illinois at Chicago and Japan's RIKEN research institute. The international team successfully formed a single chemical bond on a single molecule, then broke that bond to restore the original molecule -- without disturbing any bonds to adjacent atoms within the molecule.

In essence, they created a molecular-sized electronic switch.

"The key thing we were after was reversibility," said Michael Trenary, UIC professor of chemistry and one of the lead researchers.

Trenary's lab specializes in understanding the workings of surface chemistry -- notably how molecules interact with metals. RIKEN operates a nanoscience center that offers a vibration-free platform for the tool called a scanning tunneling microscope used to perform this molecular-level task. With the ability to cool to temperatures approaching absolute zero to stabilize molecules, the microscope is equipped with a probe that can then manipulate single molecules.

"Others have done work at the single-molecule level, but nobody has been able to get the control we have," said Trenary.

Working at RIKEN, Trenary and his Japanese colleagues converted methylisocyanide to methylaminocarbyne on a platinum surface -- a chemical mix that holds particular promise in the field of molecular electronics.

Methylisocyanide was introduced as a gas into the microscope's vacuum chamber, and the molecules attached to the super-cooled platinum. Next, hydrogen gas was injected, which breaks up into atoms when it contacts the platinum. The hydrogen atoms bonded to the methylisocyanide to form methylaminocarbyne.

The microscope can image single molecules and atoms. Using its tiny probe, the researchers manipulated the tip to just above a single molecule and gave it a small electrical pulse. The hydrogen atom popped off -- reversibility was achieved.

"It's a way to alter the metal-molecular contact, which is why it's of interest to those in molecular electronics," Trenary said. "There's been a fair amount of research on using isocyanides for molecular electronics, but without understanding the details of the bonding interaction."

"You've got to first understand the surface chemistry in detail," he said. "When you understand that, then you can use these probes to manipulate, fine-tune and control the way you want to."

Research chemists from RIKEN include Satoshi Katano, Yousoo Kim, Masafumi Hori and Maki Kawai.

The findings were reported in the June 29 issue of Science.

####

For more information, please click here

Contacts:
Paul Francuch

312-996-3457

Copyright © University of Illinois at Chicago

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Molecular Machines

'Spermbots' could help women trying to conceive (video) January 15th, 2016

Scientists blueprint tiny cellular 'nanomachine' December 17th, 2015

Nano-walkers take speedy leap forward with first rolling DNA-based motor: Fastest DNA motor holds potential for disease diagnostics December 1st, 2015

Rice makes light-driven nanosubmarines: Speedy single-molecule submersibles are a first November 16th, 2015

Chip Technology

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

The iron stepping stones to better wearable tech without semiconductors February 8th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Nanoelectronics

The iron stepping stones to better wearable tech without semiconductors February 8th, 2016

Cornell researchers create first self-assembled superconductor February 1st, 2016

Spin dynamics in an atomically thin semi-conductor February 1st, 2016

New type of nanowires, built with natural gas heating: UNIST research team developed a new simple nanowire manufacturing technique February 1st, 2016

Discoveries

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

The iron stepping stones to better wearable tech without semiconductors February 8th, 2016

Announcements

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

From allergens to anodes: Pollen derived battery electrodes February 8th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic