Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > News > Colloids twist like DNA

September 17th, 2008

Colloids twist like DNA

Abstract:
French scientists have used magnetic colloids to make self-assembling, helical structures reminiscent of DNA. Similar methods could be used to make tiny, self-propelling objects and colloidal models that mimic the assembly of complex, naturally occurring molecules.

The helices are formed from chains of dumbbell-shaped silica spheres, which are larger at one end than at the other and encircled by a magnetic 'waist' of iron oxide. In a magnetic field, the waists are attracted to each other, but as a new dumbbell approaches the growing chain it rotates to align its waist with the field. Because the dumbbells are asymmetric, the chain begins to twist into a helix.

Jerome Bibette, who led the team at the Industrial Physics and Chemistry Higher Educational Institution in Paris, says the effect resembles the way that subunits of a polymer approach each other in order to avoid steric hindrance. 'You cannot escape from the direction of polymerisation. It's imposed by nature. That's the game of chemistry and we have recreated this game with just silica spheres and magnetic waists.'

Source:
rsc.org

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

CiQUS researchers design an artificial nose to detect DNA differentiation with single nucleotide resolution September 18th, 2014

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

Biosensors Get a Boost from Graphene Partnership: $5 Million Investment Supports Dozens of Jobs and Development of 300mm Fabrication Process and Wafer Transfer Facility September 18th, 2014

Self Assembly

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Molecular self-assembly controls graphene-edge configuration September 10th, 2014

Rice chemist wins rare NSF Special Creativity Award: Grant extension will bolster Zubarev's effort to produce gold nanorods September 8th, 2014

Discoveries

CiQUS researchers design an artificial nose to detect DNA differentiation with single nucleotide resolution September 18th, 2014

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

The Pocket Project will develop a low-cost and accurate point-of-care test to diagnose Tuberculosis: ICN2 holds a follow-up meeting of the Project on September 18th - 19th September 18th, 2014

Recruiting bacteria to be technology innovation partners: September 17th, 2014

Announcements

Wear-resistant ceramic powder maximises component lifespan in high-stress applications: Innovnano’s nanostructured 3YSZ offers improved tribological performance for manufacturing components September 18th, 2014

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

Biosensors Get a Boost from Graphene Partnership: $5 Million Investment Supports Dozens of Jobs and Development of 300mm Fabrication Process and Wafer Transfer Facility September 18th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE