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

The thunder god vine, assisted by nanotechnology, could shake up future cancer treatment: Targeted therapy for hepatocellular carcinoma using nanotechnology August 27th, 2014

Scientists craft atomically seamless, thinnest-possible semiconductor junctions August 26th, 2014

RMIT delivers $30m boost to micro and nano-tech August 26th, 2014

Creation of a Highly Efficient Technique to Develop Low-Friction Materials Which Are Drawing Attention in Association with Energy Issues August 26th, 2014

Self Assembly

Nanocubes Get in a Twist : Competing forces coax nanocubes into helical structures August 11th, 2014

Self-assembly of gold nanoparticles into small clusters August 4th, 2014

Carnegie Mellon Chemists Create Nanofibers Using Unprecedented New Method July 31st, 2014

Berkeley Lab researchers create nanoparticle thin films that self-assemble in 1 minute June 9th, 2014

Discoveries

The thunder god vine, assisted by nanotechnology, could shake up future cancer treatment: Targeted therapy for hepatocellular carcinoma using nanotechnology August 27th, 2014

Creation of a Highly Efficient Technique to Develop Low-Friction Materials Which Are Drawing Attention in Association with Energy Issues August 26th, 2014

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

Symphony of nanoplasmonic and optical resonators leads to magnificent laser-like light emission August 26th, 2014

Announcements

The thunder god vine, assisted by nanotechnology, could shake up future cancer treatment: Targeted therapy for hepatocellular carcinoma using nanotechnology August 27th, 2014

Creation of a Highly Efficient Technique to Develop Low-Friction Materials Which Are Drawing Attention in Association with Energy Issues August 26th, 2014

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

Symphony of nanoplasmonic and optical resonators leads to magnificent laser-like light emission August 26th, 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