Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



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

Flexible electronics integrated with paper-thin structure for use in space January 17th, 2025

‘Brand new physics’ for next generation spintronics: Physicists discover a unique quantum behavior that offers a new way to manipulate electron-spin and magnetization to push forward cutting-edge spintronic technologies, like computing that mimics the human brain January 17th, 2025

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

How a milk component could eliminate one of the biggest challenges in treating cancer and other disease, including rare diseases: Nebraska startup to use nanoparticles found in milk to target therapeutics to specific cells January 17th, 2025

Chemistry

Chainmail-like material could be the future of armor: First 2D mechanically interlocked polymer exhibits exceptional flexibility and strength January 17th, 2025

Breaking carbon–hydrogen bonds to make complex molecules November 8th, 2024

New method in the fight against forever chemicals September 13th, 2024

Catalyzing environmental cleanup: A highly active and selective molecular catalyst and electrified membrane: Innovative electrochemical catalyst breaks down trichloroethylene pollutants at unprecedented rate September 13th, 2024

Govt.-Legislation/Regulation/Funding/Policy

Department of Energy announces $71 million for research on quantum information science enabled discoveries in high energy physics: Projects combine theory and experiment to open new windows on the universe January 17th, 2025

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

Chainmail-like material could be the future of armor: First 2D mechanically interlocked polymer exhibits exceptional flexibility and strength January 17th, 2025

Researchers uncover strong light-matter interactions in quantum spin liquids: Groundbreaking experiment supported by Rice researcher reveals new insights into a mysterious phase of quantum matter December 13th, 2024

Possible Futures

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

How a milk component could eliminate one of the biggest challenges in treating cancer and other disease, including rare diseases: Nebraska startup to use nanoparticles found in milk to target therapeutics to specific cells January 17th, 2025

The National Space Society Congratulates SpaceX on Starship’s 7th Test Flight: Latest Test of the Megarocket Hoped to Demonstrate a Number of New Technologies and Systems January 17th, 2025

The National Space Society Congratulates Blue Origin on the Inaugural Flight of New Glenn: The Heavy Lift Reusable Rocket Will Open New Frontiers and Provide Healthy Competition January 17th, 2025

Announcements

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

How a milk component could eliminate one of the biggest challenges in treating cancer and other disease, including rare diseases: Nebraska startup to use nanoparticles found in milk to target therapeutics to specific cells January 17th, 2025

The National Space Society Congratulates SpaceX on Starship’s 7th Test Flight: Latest Test of the Megarocket Hoped to Demonstrate a Number of New Technologies and Systems January 17th, 2025

The National Space Society Congratulates Blue Origin on the Inaugural Flight of New Glenn: The Heavy Lift Reusable Rocket Will Open New Frontiers and Provide Healthy Competition January 17th, 2025

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project