Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Electric charge disorder: A key to biological order? Strong attraction that arises between biological objects with random patches of electric charge on an otherwise neutral surface may partly explain pattern recognition in biology

Abstract:
Theoretical physicist Ali Naji from the IPM in Tehran and the University of Cambridge, UK, and his colleagues have shown how small random patches of disordered, frozen electric charges can make a difference when they are scattered on surfaces that are overall neutral. These charges induce a twisting force that is strong enough to be felt as far as nanometers or even micrometers away. These results, about to be published in EPJ Eš, could help to understand phenomena that occurr on surfaces such as those of large biological molecules.

Electric charge disorder: A key to biological order? Strong attraction that arises between biological objects with random patches of electric charge on an otherwise neutral surface may partly explain pattern recognition in biology

Tehran, Iran and Cambridge, UK | Posted on April 30th, 2012

To measure the strength of the twist that acts on a randomly charged surface, the authors used a sphere which was mounted like a spinning top next to a randomly charged flat substrate. Because small amounts of positive and negative charges were spread in a disordered mosaic throughout both surfaces, they induced transient attractive or repulsive twisting forces. This was regardless of the surfaces' overall electrical neutrality, thus making the sphere spin. Using statistical averaging methods, the authors studied the fluctuations of these forces.
The authors found that the twisting force, created by virtue of the disorder of surface charges, is expected to be much stronger and far-reaching than the remnant forces. The latter are always present, even in the absence of charge disorder, and are due to fluctuations at the atomic and molecular levels.
This could have implications for large randomly charged surfaces such as biological macromolecules, which may be exposed to strong electrostatic forces, inducing attraction and/or repulsion, even if they carry no overall net charge. For instance, this phenomenon could partly explain biological pattern recognition, such as lock and key phenomena. In that context, the twisting force could explain the attraction between biological macromolecules that lead to pre-alignment prior to their interaction.
Reference:
1. Naji A., Sarabadani J., Dean D.S., and Podgornik R. (2012), Sample-to-sample torque fluctuations in a system of coaxial randomly charged surfaces, European Physical Journal E (EPJ E). DOI 10.1140/epje/i2012-12024-y

####

For more information, please click here

Contacts:
Janine Haubenreisser

49-622-148-78414

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 Links

Visit the homepage of the European Physical Journal:

Article on SpringerLink:

Related News Press

News and information

Princeton-led team discovers unexpected quantum behavior in kagome lattice:Experiments suggest evidence for novel patterns of electronic charge distribution in a kagome material whose handedness can be manipulated with a magnetic field June 18th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Physics

Researchers take quantum encryption out of the lab: Field trial shows simple QKD system works with existing telecommunication network in Italy June 11th, 2021

An atom chip interferometer that could detect quantum gravity June 4th, 2021

Quantum steering for more precise measurements April 23rd, 2021

Experiments cast doubts on the existence of quantum spin liquids April 21st, 2021

Discoveries

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Announcements

Proliferation of electric vehicles based on high-performance, low-cost sodium-ion battery:A large-capacity anode material is developed for sodium-ion batteries by using low-cost silicone-based oil. This process, if commercialized, is expected to significantly reduce manufacturing June 18th, 2021

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Nanobiotechnology

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

'Nanodecoy' therapy binds and neutralizes SARS-CoV-2 virus June 18th, 2021

Turning the heat on: A flexible device for localized heat treatment of living tissues June 11th, 2021

Arrowhead Pharmaceuticals to Participate in Upcoming Conferences June 2nd, 2021

Research partnerships

New family of atomic-thin electride materials discovered June 11th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Hexagonal boron nitride's remarkable toughness unmasked: 2D material resists cracking and description by century-old theory of fracture mechanics June 2nd, 2021

Nanophotonics enhanced coverslip for phase imaging in biology May 14th, 2021

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project