Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Tiny Test Tube Experiment Shows Reaction Of Melting Materials at the Nano Scale

A still shot from the video of the nano test tube experiment conducted in the lab of Brian Korgel, professor in the Department of Chemical Engineering at The University of Texas at Austin.  The video shows gold moving up the length of a germanium nanowire, which was encased in a carbon nano test tube, at high temperature. The image has been magnified 100,000 times and the video’s speed has been greatly increased.
A still shot from the video of the nano test tube experiment conducted in the lab of Brian Korgel, professor in the Department of Chemical Engineering at The University of Texas at Austin. The video shows gold moving up the length of a germanium nanowire, which was encased in a carbon nano test tube, at high temperature. The image has been magnified 100,000 times and the video’s speed has been greatly increased.

Abstract:
Researchers at The University of Texas at Austin have conducted a basic chemistry experiment in what is perhaps the world's smallest test tube, measuring a thousandth the diameter of a human hair.

Tiny Test Tube Experiment Shows Reaction Of Melting Materials at the Nano Scale

Austin, TX | Posted on October 16th, 2009

The nano-scale test tube is so small that a high-power electron microscope was required to see the experiment.

Made from a thin shell of carbon, the test tube was stuffed with a thread-like crystal (a nanowire) of germanium with a tiny particle of gold at its tip.

The researchers heated the test tube and watched as the gold melted at the end of the nanowire, much like any solid crystal heated above its melting temperature in a glass test tube.

"The experiment is relatively simple," said chemical engineer Brian Korgel, whose laboratory conducted it. "Essentially, we observe well-known phenomena, like melting, capillarity and diffusion, but all at a much, much smaller scale than has been possible to see before."

Watch a video of the nano test tube experiment conducted in Korgel's lab, here: www.utexas.edu/opa/blogs/research/2009/10/15/more-on-the-nano-test-tube-experiment/

Such experiments provide new fundamental insights about how nanomaterials behave, and might be used to create new technologies, from better solar cells to unprecedentedly strong yet light-weight materials to higher performance optical displays and computing technologies.

Korgel and graduate students Vincent Holmberg and Matthew Panthani conducted the experiment, which was reported in the Oct. 16 edition of Science.

During the experiment, the nanowire melted as the temperature rose, but its shape was retained because the carbon test tube maintained its shape.

"In these very small structures, the phase behavior (like its melting temperature, etc.) can be different than bulk materials and can be size-dependent," Korgel said. "Therefore, if the structure changes when the phase change happens, then the result becomes very difficult to interpret and in fact, may not even represent the true behavior of the system."

The carbon test tube, however, provided a rigid container for studying what happens when materials are heated and melted at the nanoscale.

Funding for the research came from the Robert A. Welch Foundation and the National Science Foundation. Holmberg received support from the Fannie and John Hertz Foundation and the National Science Foundation for a Graduate Research Fellowship.

Learn more about Korgel's work, here www.che.utexas.edu/korgel-group/

####

About University of Texas at Austin
The University of Texas at Austin is dedicated to improving the quality of life of the people of Texas and the United States. We are a leading provider of education and research with a depth and diversity of resources unmatched by most other public universities. As an enduring symbol of the spirit of Texas—big, ambitious and bold—the university drives economic and social progress in Texas and serves our nation as a leading center of knowledge and creativity.

For more information, please click here

Contacts:
Tim Green, Office of the Vice President for Research, 512-475-6596; Brian Korgel, Cockrell School of Engineering, 512-471-5633.

Copyright © University of Texas at Austin

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

Future flexible electronics based on carbon nanotubes: Study in Applied Physics Letters show how to improve nanotube transistor and circuit performance with fluoropolymers September 23rd, 2014

Nanotubes help healing hearts keep the beat: Rice University, Texas Children’s Hospital patch for defects enhances electrical connections between cells September 23rd, 2014

Immune system is key ally in cyberwar against cancer: Rice University study yields new two-step strategy for weakening cancer September 23rd, 2014

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 2014

Chemistry

Production of Organometallic Frameworks in Least Possible Time September 23rd, 2014

New star-shaped molecule breakthrough: Scientists at The University of Manchester have generated a new star-shaped molecule made up of interlocking rings, which is the most complex of its kind ever created September 22nd, 2014

Synthesis of Nanostructures with Controlled Shape, Size in Iran September 22nd, 2014

Iranian Scientists Separate Zinc Ion at Low Concentrations September 20th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Southampton scientists grow a new challenger to graphene September 23rd, 2014

Nanotubes help healing hearts keep the beat: Rice University, Texas Children’s Hospital patch for defects enhances electrical connections between cells September 23rd, 2014

Immune system is key ally in cyberwar against cancer: Rice University study yields new two-step strategy for weakening cancer September 23rd, 2014

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 2014

Possible Futures

Air Force’s 30-year plan seeks 'strategic agility' August 1st, 2014

IBM Announces $3 Billion Research Initiative to Tackle Chip Grand Challenges for Cloud and Big Data Systems: Scientists and engineers to push limits of silicon technology to 7 nanometers and below and create post-silicon future July 10th, 2014

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

Local girl does good March 22nd, 2014

Announcements

Future flexible electronics based on carbon nanotubes: Study in Applied Physics Letters show how to improve nanotube transistor and circuit performance with fluoropolymers September 23rd, 2014

Nanotubes help healing hearts keep the beat: Rice University, Texas Children’s Hospital patch for defects enhances electrical connections between cells September 23rd, 2014

Immune system is key ally in cyberwar against cancer: Rice University study yields new two-step strategy for weakening cancer September 23rd, 2014

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 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