Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > How do cold ions slide

Ions on optical latticeCredits: SISSA
Ions on optical lattice

Credits: SISSA

Abstract:
Things not always run smoothly. It may happen, actually, that when an object slides on another, the advancement may occur through a ‘stop and go' series in the characteristic manner which scientists call "stick-slip", a pervasive phenomenon at every scale, from earthquakes to daily-life objects, up to the "nano" dimension. Davide Mandelli, Andrea Vanossi and Erio Tosatti of the International School for Advanced Studies (SISSA) of Trieste have studied the conditions in which at the nanoscopic level the switch from smooth sliding to stick-slip regime occurs, simulating ‘toy-like' systems of ‘cold ions'.

How do cold ions slide

Trieste, Italy | Posted on May 24th, 2013

"Our studies are based on the research on trapped cold ions. Before we did, such methodology had never been applied to the field of friction", explains Tosatti. "These are experimental studies I call ‘toy-like' because they are models employed to explore reality, in the same way as a Lego little house may be used as the model of a real house. We have simulated such systems and used them in our field of research." Tosatti is the coordinator of the research, which appeared in the scientific journal Physical Review. The study, besides SISSA, also involves the Centro Democritos of Officina dei Materiali CNR-IOM.

More in detail…

The three scientists have simulated the sliding of a one-dimensional ion chain of finite length on a substrate generated by laser beams (an optical lattice).

"The lattice forms a periodic sequence of ‘barriers' and ‘holes', whose depth determines the behavior of the ion chain when advancing on the substrate pulled by an electric field," explains Mandelli, a student at SISSA. When the holes are shallow - technically speaking, when the amplitude of the corrugated potential is small enough - the ion chain can slide in a continuous manner, while when they are deeper the movement of the ions appears more restrained, and thus the stick-slip regime is observed." Another interesting observation" adds Mandelli "regards the role of the chain's inhomogeneity, as a consequence of which some areas get more or less stuck on the substrate. As a consequence, before the sliding process starts, internal ‘adjustments' occur in which few ions move in the direction of the pulling force. Also this phenomenon has been observed at macroscopic scales."

In a 2011 study Tosatti e Vanossi had already employed such model to study static friction. With this work they have extended their observations to the field of dynamics.

"Such studies are important for two reasons", explains Mandelli. "On one side, the stick-slip is a complex phenomenon that occurs at every scale whose dynamics are still little-known. Just try to imagine how important it is to understand it from a geological viewpoint, for instance. On the other, with the development of nanotechnologies also from an application point of view it becomes fundamental to know the details of the interaction mechanics of molecules and atoms."

On the connection between mesoscale and nanoscale friction Tosatti and Vanossi have recently published also a "colloquium" (a series of articles in scientific reviews) in the international journal Reviews of Modern Physics. Such research line carried out at SISSA has been recently awarded with a 5-year Advanced Grant by the European Research Council.

####

For more information, please click here

Contacts:
Federica sgorbissa

Copyright © AlphaGalileo

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

Full bibliographic information

Related News Press

News and information

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

The 16th Trends in Nanotechnology International Conference (TNT 2015) unveils 25 Keynote Speakers: Call for abstracts open April 27th, 2015

Graphenea celebrates fifth anniversary April 27th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Physics

Pseudoparticles travel through photoactive material: KIT scientists measure important process in the conversion of light energy -- publication in Nature Communications April 24th, 2015

Electron spin brings order to high entropy alloys April 23rd, 2015

Surface matters: Huge reduction of heat conduction observed in flat silicon channels April 23rd, 2015

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

Govt.-Legislation/Regulation/Funding/Policy

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Electron spin brings order to high entropy alloys April 23rd, 2015

Discoveries

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Cacao Seed Extract Used in Production of Catalytic Nanoparticles April 27th, 2015

Heat makes electrons’ spin in magnetic superconductors April 26th, 2015

Announcements

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

The 16th Trends in Nanotechnology International Conference (TNT 2015) unveils 25 Keynote Speakers: Call for abstracts open April 27th, 2015

Graphenea celebrates fifth anniversary April 27th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Photonics/Optics/Lasers

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

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