Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Dimensional Crossover in Nano-size Particles

Abstract:
Professor CHOE Sug-bong found that nano-size particles could be reduced to the point where they exist in a blurred boundary between a two-dimensional and one-dimensional phase.

Dimensional Crossover in Nano-size Particles

Seoul, Korea | Posted on May 11th, 2009

CHOE's research marks the first time that the dimensional crossover from a two-dimensional planar object and a one-dimensional line has been observed, as well as the critical point where the phase boundary ceases to exist.

Professor CHOE said the latest findings add detail to the complex picture of nature's universal laws in phase transitions, which regulate everything from the transition between vapor and liquid to changes in stock markets and earthquakes.

The discovery could also contribute to advancing emerging technology fields such as nano-sprintronics and developing new methods for producing nano-materials, he said.

``The research was conducted to improve our knowledge of nature's universality in controlling natural phenomenon, but the fundamental logic revealed in our study also offers possibilities for industrial applications,'' CHOE said.

``Nano-size objects used in electronic devices are getting smaller and smaller, and it's easy to predict that the nano-particles will be reduced in size to a point where they make the transition from the three-dimensional regime to a two-dimensional regime, and eventually a one-dimensional regime. However, scientists have been coming short of revealing exactly at what size the transitions occurs and the process of the transition, and our study provides an advancement in this area,'' he said.

The crossover to the one-dimensional regime occurred at a few hundred nanometers, which corresponds to the integration scale for modern nano-devices, CHOE said.

When the widths of the nano-wires were between 4.2 micrometers to 756 nanometers, the motions of domain walls retained the speed of a two-dimensional phase.

However, crossover behavior was first detected when the nano-wires were reduced to 500 nanometers in width, and at the 150-nanometer level particles began showing one-dimensional characteristics.

``We were surprised to discover that the two dimensional characteristics and one-dimensional characteristics co-existed when the nano-particles were between 500 nanometers and 150 nanometers in width,'' CHOE said.

``For this certain material, the crossover to the one dimensional phase occurred when it was reduced below 150 nanometers, while it retained two dimensional characteristics above 500 nanometers.''

This study was published in journal Nature on April 8.

####

About Seoul National University
Seoul National University honors the ideals of liberal education and aims to teach students a lifelong love of learning that will form the basis for continuous personal growth.

At the same time it is committed to preparing students to work and live in an increasingly competitive global environment. As South Korea's first national university, Seoul National University has a tradition of standing up for democracy and peace on the Korean peninsula.

Graduates have long served as public servants in key positions of the Korean government. In teaching, research, and public service, Seoul National University continues to set the standard of excellence.

The mission of Seoul National University in the twenty-first century is to create a vibrant intellectual community where students and scholars join together in building the future. As Korea's leading research university, Seoul National University is committed to diversifying its student body and faculty, fostering global exchange, and promoting path-breaking research in all fields of knowledge.

For more information, please click here

Contacts:
Main Campus, Gwanak _ 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Tel: 82-2-880-4447
Fax: 82-2-880-4449

Medical Campus, Yongon _103 Daehangno, Jongno-gu, Seoul 110-799, Korea

Copyright © Seoul National University

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 News Press

News and information

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Possible Futures

Virus structure inspires novel understanding of onion-like carbon nanoparticles April 10th, 2014

Local girl does good March 22nd, 2014

Surface Characteristics Influence Cellular Growth on Semiconductor Material March 12th, 2014

The "Tipping Point" February 12th, 2014

Spintronics

Could Diamonds Be A Computer’s Best Friend? Landmark experiment reveals the precious gem’s potential in computing March 24th, 2014

Spintronic Thermoelectric Power Generators: A step towards energy efficient electronic devices March 21st, 2014

Relativity shakes a magnet: Researchers from Mainz University demonstrate a new principle for magnetic recording / Publication in Nature Nanotechnology March 4th, 2014

Ion beams pave way to new kinds of valves for use in spintronics February 18th, 2014

Materials/Metamaterials

Thinnest feasible membrane produced April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Engineers develop new materials for hydrogen storage April 15th, 2014

Industrial Nanotech, Inc. Lands First Major Order from Pemex, Mexico’s State-Owned Oil and Gas Company April 14th, 2014

Announcements

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Industrial

Shiny quantum dots brighten future of solar cells: Photovoltaic solar-panel windows could be next for your house April 14th, 2014

Industrial Nanotech, Inc. Lands First Major Order from Pemex, Mexico’s State-Owned Oil and Gas Company April 14th, 2014

Industrial Nanotech, Inc. Announces Certification for Use in Middle East for Buildings: Nansulate(R) Energy Saving Coatings to be used by Major Middle East Energy Company April 1st, 2014

Harper Government Announces Support for U of S Nanoscience Research: Uses for New Nanostructured Coatings Range from Biomedical to Oil Sand Sectors March 29th, 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