Latest UT-Battelle Stories

2014-02-24 12:22:17

KNOXVILLE, Tenn., Feb. 24, 2014 /PRNewswire-USNewswire/ -- With the installation of LED fixtures, the University of Tennessee, Knoxville's, Thompson-Boling Arena is one of the first in the world to feature lights that are smaller, brighter and up to 85 percent more efficient than conventional arena metal halide lights. The technology--developed and manufactured by Oak Ridge-based LED North America at the Tech 20/20 incubator facility in Oak Ridge, incorporating an Oak Ridge National...

'Dancing' Silicon Atoms In Graphene Uncovered By ORNL Microscopy
2013-04-03 17:14:54

Oak Ridge National Laboratory Jumping silicon atoms are the stars of an atomic scale ballet featured in a new Nature Communications study from the Department of Energy's Oak Ridge National Laboratory. The ORNL research team documented the atoms' unique behavior by first trapping groups of silicon atoms, known as clusters, in a single-atom-thick sheet of carbon called graphene. The silicon clusters, composed of six atoms, were pinned in place by pores in the graphene sheet, allowing the...

UT-ORNL Supercomputer Center Has New Director
2012-12-12 11:17:51

The University of Tennessee, Knoxville Tony Mezzacappa, a leader in the field of astrophysics and supernova science, has been named director of the Joint Institute for Computational Sciences (JICS) at UT and Oak Ridge National Laboratory (ORNL). Mezzacappa is a world leader in computational astrophysics and a pioneer in the field of supernova science. He is UT-Battelle Corporate Fellow and group leader for theoretical physics in the Physics Division at ORNL and joint professor in the...

Microscopy Explores Nanowires' Weakest Link
2012-02-14 04:54:25

Individual atoms can make or break electronic properties in one of the world's smallest known conductors–quantum nanowires. Microscopic analysis at the Department of Energy's Oak Ridge National Laboratory is delivering a rare glimpse into how the atomic structure of the conducting nanowires affects their electronic behavior. The ORNL team's microscopy confirmed that deliberately introduced defects, which are only the size of a single atom, could turn a conducting nanowire into an...

Nanoscale Metallic Conductivity In Ferroelectrics
2012-01-10 07:09:41

ORNL experiments prove nanoscale metallic conductivity in ferroelectrics The prospect of electronics at the nanoscale may be even more promising with the first observation of metallic conductance in ferroelectric nanodomains by researchers at Oak Ridge National Laboratory. Ferroelectric materials, which switch their polarization with the application of an electric field, have long been used in devices such as ultrasound machines and sensors. Now, discoveries about ferroelectrics'...

2011-10-13 18:34:38

A method of monitoring roots rarely used in wetlands will help Oak Ridge National Laboratory researchers effectively study the response of a high-carbon ecosystem to elevated temperatures and levels of carbon dioxide. Colleen Iversen, ORNL ecosystem ecologist, and an international group of experts, worked to develop a consensus on the use of minirhizotrons, or tiny video cameras that take images of roots, in wetlands. Minirhizotrons are an improvement over previous technology because they...

2011-09-23 11:44:24

Crystals and ceramics pale when compared to a material researchers at Oak Ridge National Laboratory discovered that has 10 times their piezoelectric effect, making it suitable for perhaps hundreds of everyday uses. ORNL's Volker Urban and colleagues at Technical University Aachen in Germany noticed the reverse piezoelectric effect - defined as creating a mechanical strain by applying an electrical voltage -- while conducting fundamental research on polymers. At first they didn't think...

2011-06-17 08:01:24

A first of its kind combination of experiment and simulation at the Department of Energy's Oak Ridge National Laboratory is providing a close-up look at the molecule that complicates next-generation biofuels. Lignin, a major component of plant cell walls, aggregates to form clumps, which cause problems during the production of cellulosic ethanol. The exact shape and structure of the aggregates, however, have remained largely unknown. A team led by ORNL's Jeremy Smith revealed the surface...

2011-04-25 16:42:21

Novel properties of ferroelectric materials discovered at the Department of Energy's Oak Ridge National Laboratory are moving scientists one step closer to realizing a new paradigm of electronic memory storage. A new study led by ORNL's Peter Maksymovych and published in the American Chemical Society's Nano Letters revealed that contrary to previous assumptions, domain walls in ferroelectric materials act as dynamic conductors instead of static ones. Domain walls, the separation zones only a...

2010-12-09 20:18:44

A quicker and cheaper technique to scan molecular databases developed at the Department of Energy's Oak Ridge National Laboratory could put scientists on the fast track to developing new drug treatments. A team led by Jerome Baudry of the University of Tennessee-ORNL Center for Molecular Biophysics adapted a widely used existing software to allow supercomputers such as ORNL's Jaguar to sift through immense molecular databases and pinpoint chemical compounds as potential drug candidates. The...

Word of the Day
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'