Researchers at the Georgia Institute of Technology and NASA suggest that materials on the nanoscale may sometimes be subject to the same physical rules as their macro-world counterparts.
The findings provide an exception to the conventional scientific notion that objects small enough to be measured in nanometers (one-billionth of a meter) behave according to different rules than larger objects.
A team led by Lawrence Bottomley in Georgia Tech’s School of Chemistry and Biochemistry and Jonathon Colton in the School of Mechanical Engineering found that the mechanical response of a multi-walled carbon nanospring was remarkably similar to the rules that govern the mechanical properties of springs on the macro scale.
The results are published in the American Chemical Society journal Nano Letters, Volume 4, Number 6.
“Small may not necessarily be different when it comes to the mechanical properties of springs,” said Bottomley.
The findings suggest there may be other nano materials that behave in ways similar to their macroscale counterparts.
The results were surprising because they ran counter to the common wisdom in the literature said Colton.
“You’ve got to study each case carefully, don’t just assume it’s different,” Bottomley added.
The team used an atomic force microscope to compress a multi-walled carbon nanospring attached to the cantilever probe tip. By simultaneously monitoring cantilever deflection, oscillation amplitude and resonance of the cantilever, the group found the nanospring compressed and buckled in the same ways a macroscale spring would.
In this one application we modeled the performance of a nanospring using the equations that are used to describe two macroscale springs in series. The agreement of data with the theory is remarkably good, said Bottomley.
In the future, the team plans further tests on multiwalled carbon nanosprings to correlate the number of walls, number of coils, and helical pitch with mechanical performance.
Georgia Institute of Technology
Subscribe To SpaceDaily Express
Light On A Chip Potential Seen By Scientists Spoofing Natural Phenomenon
Exeter, UK (SPX) Jul 09, 2004
An ultrafine nanometre 'drill' could be used to make some of the tiniest lenses imaginable and may also allow scientists to harness light for use in optical computers of the future, thanks to research published today.
|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.|