Subscribe free to our newsletters via your
. 24/7 Space News .

Subscribe free to our newsletters via your

Materials Retain Useful Properties At Nanoscale Researchers Find

Fayetteville - Dec 14, 2003
One of the materials that powers modern technology like medical ultrasound and nationwide cell phones has been discovered to retain its properties when present in extraordinarily tiny amounts. This discovery implies that this and other materials with similar properties may be valuable at nanoscale in the production of small, smart communications devices, tiny diagnostic instruments and nano-robots.

These ferroelectric materials have a spontaneous dipole, or charge separation, that allows them to generate an electric current when their shape is changed--thus, mechanical energy becomes electricity. Until now, however, researchers had not determined whether these materials retain their properties at the nanoscale, where quantum physics plays a predominant role and different rules apply.

A group of University of Arkansas physicists has determined that the materials that allow these energy conversions indeed retain their properties at the nanoscale. Huaxiang Fu, assistant professor of physics, and Laurent Bellaiche, associate professor of physics, report their findings in an upcoming issue of Physical Review Letters.

Using computer modeling, Fu and Bellaiche looked at barium titanium oxide (BaTiO3), a typical ferroelectric material. While they found that BaTiO3 quantum dots would continue to have a dipole at the nanoscale, some differences do exist between the nanoscale material and its bulk counterpart.

For instance, the researchers found that converting electricity to mechanical energy—for the specific case studied—is less efficient at the nanoscale than at the classical scale.

They also found that, unlike in BaTiO3 bulk, dipoles do not naturally align in the same direction in the nanomaterial, but rather form a vortex pattern. They discovered that the dipoles do align if the researchers use a voltage that is strong enough. The voltage required to make the dipoles line up depends upon the length of the material.

These findings mark the first look at the properties of ferroelectric compounds at the nanoscale and will allow researchers to begin to further explore these properties.

"This is a new field. No one really knows the answers," Fu said.

Related Links
University of Arkansas
Search SpaceDaily
Subscribe To SpaceDaily Express

Purdue's Self-Assembled 'Nanorings' Could Boost Computer Memory
 West Lafayette - Dec 11, 2003
Recent nanotechnology research at Purdue University could pave the way toward faster computer memories and higher density magnetic data storage, all with an affordable price tag.

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once

credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly

paypal only

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.