A collaboration between Oak Ridge National Laboratory researchers and a team led by the Carnegie Institution for Science's Malcolm Guthrie has led to discoveries about how ice behaves under pressure, changing ideas that date back almost 50 years. The findings could alter scientists' understanding of how the water molecule responds to conditions found deep within planets and could have implications for energy science.
Scientists at Oak Ridge National Laboratory (ORNL) have designed and tested an all-solid lithium-sulfur battery with approximately four times the energy density of conventional lithium-ion technologies that power today's electronics. The ORNL battery design, which uses abundant low-cost elemental sulfur, also addresses flammability concerns experienced by other chemistries.
Once they've finished powering electric vehicles for hundreds of thousands of miles, it may not be the end of the road for automotive batteries. Five used Chevrolet Volt batteries are at the heart of Oak Ridge National Laboratory's effort to determine the feasibility of a community energy storage system that would put electricity onto the grid.
The Gulf of Mexico may have a much greater natural ability to self-clean oil spills than previously believed, according to Terry Hazen, University of Tennessee-Oak Ridge National Laboratory Governor's Chair for Environmental Biotechnology. Hazen’s research team used a powerful new approach for identifying microbes in the environment to discover previously unknown and naturally occurring bacteria that consume and break down crude oil.
A technology being developed at Oak Ridge National Laboratory promises to provide clear images of the brains of children, the elderly, and people with Parkinson's and other diseases without the use of uncomfortable or intrusive restraints. Awake imaging provides motion compensation reconstruction, which removes blur caused by motion, allowing physicians to get a transparent picture of the functioning brain without anesthetics that can mask conditions and alter test results.
Jumping silicon atoms are the stars of an atomic scale ballet featured in a new Nature Communications study from the U.S. Department of Energy(DOE)'s Oak Ridge National Laboratory (ORNL). 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.
Microbes from the human mouth are telling Oak Ridge National Laboratory scientists something about periodontitis and more after they cracked the genetic code of bacteria linked to the condition. The research marks the first time scientists have managed to isolate and cultivate this type of bacterium.
The adsorption of ions in microporous materials governs the operation of a diverse range of technologies. Until now, however, researchers attempting to improve the performance of these technologies haven't been able to directly and unambiguously identify how factors such as pore size, pore surface chemistry, and electrolyte properties affect the concentration of ions in these materials as a function of the applied potential. A team of researchers has demonstrated that a technique, known as small angle neutron scattering, can be used to study the effects of ions moving into nanoscale pores.
By identifying two genes required for transforming inorganic into organic mercury, which is far more toxic, scientists today have taken a significant step toward protecting human health. The question of how methylmercury, an organic form of mercury, is produced by natural processes in the environment has stumped scientists for decades, but a team led by researchers at Oak Ridge National Laboratory has solved the puzzle.
Researchers seeking to improve production of ethanol from woody crops have a new resource in the form of an extensive molecular map of poplar tree proteins, published by a team from the U.S. Department of Energy's Oak Ridge National Laboratory.
Looking toward improved batteries for charging electric cars and storing energy from renewable but intermittent solar and wind, scientists at Oak Ridge National Laboratory have developed the first high-performance, nanostructured solid electrolyte for more energy-dense lithium-ion batteries.
A technology invented at Oak Ridge National Laboratory for manufacturing copper-oxide-based high-temperature superconducting materials has been used to make an iron-based superconducting wire capable of carrying very high electrical currents under exceptionally high magnetic fields.
Changes in the R&D environment are driving research managers to look at different ways to support and grow their organizations.
2012 R&D Research Executive Roundtable answers from Oak Ridge National Laboratory. Changes in the R&D environment are driving research managers to look at different ways to support and grow their organizations.
Turning lignin, a plant's structural glue and a byproduct of the paper and pulp industry, into something considerably more valuable is driving a research effort headed by Oak Ridge National Laboratory. The research team has developed a process that ultimately transforms the lignin byproduct into a thermoplastic by reconstructing larger lignin molecules either through a chemical reaction with formaldehyde or by washing with methanol.
By tweaking the formula for growing oxide thin films, researchers at Oak Ridge National Laboratory achieved virtual perfection at the interface of two insulator materials. The research team demonstrated that a single unit cell layer of lanthanum aluminate grown on a strontium titanate substrate is sufficient to stabilize a chemically and atomically sharp interface.
Electron microscopy at Oak Ridge National Laboratory is providing unprecedented views of the individual atoms in graphene, offering scientists a chance to unlock the material's full potential for uses from engine combustion to consumer electronics. A research team used aberration-corrected scanning transmission electron microscopy to study the atomic and electronic structure of silicon impurities in graphene.
Researchers at Oak Ridge National Laboratory have reported progress in fabricating advanced materials at the nanoscale. The spontaneous self-assembly of nanostructures composed of multiple elements paves the way toward materials that could improve a range of energy-efficient technologies and data storage devices.
According to the Top500 list, the semiannual ranking of computing systems around the world that was announced Monday morning, Oak Ridge National Laboratory’s Titan is now the world’s most potent supercomputer. It eclipses the most recent top performed, Lawrence Livermore National Laboratory’s Sequoia, with a speed of 17.59 petaflops in testing. The Titan is a Cray XK7 hybrid system, built from 16-core processors equipped with graphic processing unit (GPU) accelerators.
The U.S. Department of Energy's Oak Ridge National Laboratory launched a new era of scientific supercomputing on Tuesday with Titan, a system capable of churning through more than 20,000 trillion calculations each second—or 20 petaflops—by employing a family of processors called graphic processing units first created for computer gaming. Titan will be 10 times more powerful than ORNL's last world-leading system, Jaguar.
Much has been made of graphene’s exceptional qualities, particularly its phenomenal strength and impermeability. But the material may not be as impenetrable as scientists have thought. Recent analysis shows that the material bears intrinsic defects, or holes in its atom-sized armor. Experiments demonstrate small molecules like salts can pass easily through a graphene membrane’s tiny pores, while larger molecules were unable to penetrate.
Researchers at Oak Ridge National Laboratory have found that nitrogen atoms in the compound uranium nitride exhibit unexpected, distinct vibrations that form a nearly ideal realization of a physics textbook model known as the isotropic quantum harmonic oscillator.
Nanoribbons of silicon configured so the atoms resemble chicken wire could hold the key to ultrahigh density data storage and information processing systems of the future. This was a key finding of an Oak Ridge National Laboratory team who used scanning tunneling microscopy and spectroscopy to validate first principle calculation that for years had predicted this outcome.
In a push to lower the cost of solar power, the U.S. Department of Energy has funded two projects at Oak Ridge National Laboratory focused on improving concentrating solar power collector and receiver performance.
A team led by Oak Ridge National Laboratory has discovered a strain relaxation phenomenon in cobaltites that has eluded researchers for decades and may lead to advances in fuel cells, magnetic sensors, and a host of energy-related materials. The finding could change the conventional wisdom that accommodating the strain inherent during the formation of epitaxial thin films involves structural defects.