Researchers at Oak Ridge National Laboratory and the Univ. of Tennessee, Knoxville have pioneered a new technique for forming a 2-D, single-atom sheet of two different materials with a seamless boundary. The study could enable the use of new types of 2-D hybrid materials in technological applications and fundamental research.
To understand how to design better thermoelectric materials, researchers are using neutron scattering at the Spallation Neutron Source and the High Flux Isotope Reactor at Oak Ridge National Laboratory to study how silver antimony telluride is able to effectively prevent heat from propagating through it on the microscopic level.
Researchers based at Oak Ridge National Laboratory and the Univ. of Tennessee have discovered a molecular “switch” in a receptor that controls cell behavior. Researchers identified the molecular switch using detailed molecular dynamics simulations on a computer called Anton, built by D. E. Shaw Research in New York City.
The goal of fabricating fixed-size one-dimensional silica structures and being able to precisely control the diameter during growth has long eluded scientists. Now, Oak Ridge National Laboratory researchers Panos Datskos and Jaswinder Sharma have demonstrated what they describe as the addressable local control of diameter of each segment of the silica rod.
Researchers at Oak Ridge National Laboratory are working with aircraft makers to determine energy savings through the use of additive manufacturing, also known as 3-D printing. The research team is printing airplane parts to show additive manufacturing’s potential as a technology that should be considered foundational to processes seeking more energy efficiency.
Ferroelectric materials are known for their ability to spontaneously switch polarization when an electric field is applied. An Oak Ridge National Laboratory-led team took advantage of this property to draw areas of switched polarization called domains on the surface of a ferroelectric material. To the researchers’ surprise, the domains began forming complex and unpredictable patterns that the researchers say should not be possible.
Researchers studying more effective ways to convert woody plant matter into biofuels have identified fundamental forces that change plant structures during pretreatment processes used in the production of bioenergy. Experimental techniques including neutron scattering and x-ray analysis with supercomputer simulations revealed unexpected findings about what happens to water molecules trapped between cellulose fibers.
Amit Goyal and his team of research scientists are using copper oxide to redesign the face of solar power. The once-dismissed solar semiconductor, one of the first discovered, is the basis of ongoing research at Oak Ridge National Laboratory, where scientists are creating cheaper and safer alternatives for solar conducting technology.
Gas and oil deposits in shale have no place to hide from an Oak Ridge National Laboratory technique that provides an inside look at pores and reveals structural information potentially vital to the nation’s energy needs. The research could clear the path to the more efficient extraction of gas and oil from shale.
Of the five senses, smell is the least understood, but an Oak Ridge National Laboratory researcher is sniffing out answers that could help establish a systematic understanding of how people categorize odors. The paper could ultimately result in more complete explanations of how the brain’s odor processing mechanism represents and categorizes odors, and help in the effort to predict mental impressions of odors from chemicals.
Scientists at Oak Ridge National Laboratory have developed a new oxygen “sponge” that can easily absorb or shed oxygen atoms at low temperatures. It consists of strontium cobaltite which has been synthesized in a desirable phase known as perovskite. Materials like this would be useful in devices such as rechargeable batteries, sensors, gas converters and fuel cells.
Broad-area laser diode arrays offer high electrical power conversion efficiency (from 50 to 70%), up to 100 W of light power and are relatively inexpensive to fabricate. However, the diodes in the array suffer from multi-transverse mode emission, which means that phase-locking is impossible. This limits beam quality and brightness. Oak Ridge National Laboratory invented an efficient method to extract a high-quality optical beam from a broad-area laser array by using a V-shaped (off-axis) external optical cavity.
For Big Data applications I/O needs to be efficient and scalable so that large data sets can be accessed quickly and fed to applications for processing. With this goal in mind, a team led by Oak Ridge National Laboratory has created ADIOS, a software framework designed to handle the I/O requirements of Big Data projects.
Every person, company and government organization is faced with continuously flowing, massive streams of data that can’t be manually analyzed. Computers help, but the sheer volume of data has foiled many approaches. Software engineers at Oak Ridge National Laboratory have now developed a new way of dealing with this seemingly intractable problem.
The efficiency of internal combustion engines plays a major role in reducing greenhouse gas emissions and lowering resource consumption. One specific but important task is ensuring that lubricant oil is not diluted by fuel, thereby hurting viscosity and efficiency. The Da Vinci Fuel-In-Oil (DAFIO) measurement system, developed by Da Vinci Emissions Services Ltd., Oak Ridge National Laboratory and Cummins Inc., is a tool that engineers can use to rapidly—within five to 10 min—develop engines and engine control strategies that minimize the chances of fuel dilution of lubricant oil. The tool replaces the accepted standard method of gas chromatography.
The ClimateMaster Trilogy 40 Q-Mode water-to-air packaged geothermal heat pump unit, developed by ClimateMaster and Oak Ridge National Laboratory, is the first geothermal heat pump to exceed a certified cooling efficiency of 40 EER (energy-efficiency ratio) under the AHRI’s part load ground loop rating conditions.
Lithium-ion battery separators prevent the anode and cathode layers from contacting each other, allowing cell potential to be maintained and safe operation of the battery. The SYMMETRIX HPX-F polymer-ceramic composite separator, developed by Porous Power Technologies and Oak Ridge National Laboratory, achieves this functionality while improving safety over conventional polyolefin membranes.
Tennessee scientists are using one of Earth’s smallest creatures to solve some of the government’s biggest bioenergy problems. For the next three years, a $2.1 million grant is allowing researchers at Oak Ridge National Laboratory to use a process called microbial electrolysis to transform plant biomass into hydrogen to produce energy-rich biofuel for use in combustion engines.
Lignin is a waste material that is produced when paper is manufactured from wood. Instead of disposing of the lignin, a research team at the U.S. Dept. of Energy’s Oak Ridge National Laboratory has learned how to take the material and convert it into powering a green battery.
A team led by Oak Ridge National Laboratory’s Amit Goyal, a former R&D Scientist of the Year, has demonstrated that superconducting wires can be tuned to match different operating conditions by introducing small amounts of non-superconducting material, or defects, that influences how the overall material behaves. A wire sample grown with this process exhibited new levels of performance in terms of engineering critical current density.
A new study from an international team led by Oak Ridge National Laboratory is guiding drug designers toward improved pharmaceuticals to treat HIV. The scientists used neutrons and x-rays to study the interactions between HIV protease, a protein produced by the HIV virus, and an antiviral drug commonly used to block virus replication.
Better batteries, catalysts, electronic information storage and processing devices are among potential benefits of an unexpected discovery made by Oak Ridge National Laboratory scientists using samples isolated from the atmosphere. The researchers learned that key surface properties of complex oxide films are unaffected by reduced levels of oxygen during fabrication, a finding that could help design functional complex oxides.
More forms of mercury can be converted to deadly methylmercury than previously thought, according to a study published in Nature Geoscience.The discovery provides scientists with another piece of the mercury puzzle, bringing them one step closer to understanding the challenges associated with mercury cleanup.
The Consortium for Advanced Simulation of Light Water Reactors (CASL) announced that its scientists have successfully completed the first full-scale simulation of an operating nuclear reactor. CASL is modeling nuclear reactors on supercomputers to help researchers better understand reactor performance, with the goal of ultimately increasing power output, extending reactor life and reducing waste.
Researchers at the U.S. Dept. of Energy's Oak Ridge National Laboratory have received six R&D 100 awards. The six awards bring ORNL's total of R&D 100 awards to 179 since their inception in 1963. This year, ORNL received awards for the following technologies: ClimateMaster Trilogy 40 Q-Mode Geothermal Heat Pump, Distribute The Highest Selected Textual Recommendation, V-shaped External Cavity Laser Diode Array, and more.