Advertisement
Oak Ridge National Laboratory (DOE)
Subscribe to Oak Ridge National Laboratory (DOE)

The Lead

Study reveals new characteristics of complex oxide surfaces

July 25, 2014 8:25 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

A novel combination of microscopy and data processing has given researchers at Oak Ridge National Laboratory (ORNL) an unprecedented look at the surface of a material known for its unusual physical and electrochemical properties. The research team led by ORNL’s Zheng Gai examined how oxygen affects the surface of a perovskite manganite, a complex material that exhibits dramatic magnetic and electronic behavior.

Oak Ridge National Lab launches imaging institute

June 24, 2014 10:06 am | by Dawn Levy, Oak Ridge National Laboratory | News | Comments

Oak Ridge National Laboratory has launched the...

Neutrons, x-rays reveal structure of high-temperature liquid metal oxides

June 2, 2014 8:16 am | by Katie Bethea, Oak Ridge National Laboratory | News | Comments

By levitating a bead of ceramic oxide, heating it with a 400-W carbon dioxide laser, then...

Technique enables air-stable water droplet networks

May 14, 2014 7:48 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

A simple new technique to form interlocking beads of water in ambient conditions could prove...

View Sample

FREE Email Newsletter

Paper examines clues for superconductivity in an iron-based material

May 5, 2014 10:12 am | by Ron Walli, Oak Ridge National Laboratory Communications | News | Comments

For the first time, scientists have a clearer understanding of how to control the appearance of a superconducting phase in a material, adding crucial fundamental knowledge and perhaps setting the stage for advances in the field of superconductivity. The paper focuses on a calcium-iron-arsenide single crystal, which has structural, thermodynamic and transport properties that can be varied through carefully controlled synthesis.

“Sweet spot” for salty water

April 28, 2014 7:50 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Computational modeling has given materials researchers new insight into the properties of a membrane that purifies saltwater into potable water. The resulting technology could help speed up inefficient desalination processes in use today. The research team used supercomputer simulations to explore the purification potential of a hybrid material called graphene oxide frameworks.

Double-duty electrolyte enables new chemistry for longer-lived batteries

April 24, 2014 11:44 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Researchers at Oak Ridge National Laboratory have developed a new and unconventional battery chemistry aimed at producing batteries that last longer than previously thought possible. In a study published in the Journal of the American Chemical Society, ORNL researchers challenged a long-held assumption that a battery’s three main components can play only one role in the device.

Advertisement

Atomic switcheroo explains origins of thin-film solar cell mystery

April 24, 2014 7:55 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Treating cadmium-telluride (CdTe) solar cell materials with cadmium-chloride improves their efficiency, but researchers have not fully understood why. Now, an atomic-scale examination of the thin-film solar cells led by Oak Ridge National Laboratory has answered this decades-long debate about the materials’ photovoltaic efficiency increase after treatment.

Oak Ridge study pegs fuel economy costs of common practices

April 9, 2014 3:07 pm | News | Comments

People who pack their cars and drive like Clark Griswold in National Lampoon’s “Vacation” pay a steep penalty when it comes to fuel economy, according to a report by Oak Ridge National Laboratory. Researchers tested vehicles at a variety of speeds with different configurations of load and tire inflation. While the findings were not unexpected, they serve as a reminder of how drivers can save money by taking simple measures.

Carbon nanotubes grow in combustion flames

April 1, 2014 4:34 pm | News | Comments

Recent research in Japan, China and U.S. has revealed through theoretical simulations that the molecular mechanism of carbon nanotube growth and hydrocarbon combustion actually share many similarities. In studies using acetylene molecules as feedstock, a highly reactive molecular intermediate was found to play an important role in both processes forming CNTs and soot, which are two distinctively different structures.

Team discovers unexpected effect of heavy hydrogen in organic solar cells

March 11, 2014 8:47 am | News | Comments

Photovoltaic spray paint could coat the windows and walls of the future if scientists are successful in developing low-cost, flexible solar cells based on organic polymers. Scientists at the Oak Ridge National Laboratory recently discovered an unanticipated factor in the performance of polymer-based solar devices that gives new insight on how these materials form and function.

Team discovers unexpected effect of heavy hydrogen in organic solar cells

March 6, 2014 10:55 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Photovoltaic spray paint could coat the windows and walls of the future if scientists are successful in developing low-cost, flexible solar cells based on organic polymers. Scientists at Oak Ridge National Laboratory recently discovered an unanticipated factor in the performance of polymer-based solar devices that gives new insight on how these materials form and function.

Advertisement

National labs join forces to develop next supercomputers

February 26, 2014 9:36 am | News | Comments

Lawrence Livermore National Laboratory has joined forces with two other national laboratories—Oak Ridge and Argonne—to deliver next-generation supercomputers able to perform up to 200 peak petaflops, about 10 times faster than today's most powerful high-performance computing (HPC) systems.

Microscopy system delivers real-time view of battery electrochemistry

February 19, 2014 3:17 pm | News | Comments

Using a new microscopy method, researchers at Oak Ridge National Laboratory (ORNL) can image and measure electrochemical processes in batteries in real time and at nanoscale resolution. Scientists at ORNL used a miniature electrochemical liquid cell that is placed in a transmission electron microscope to study an enigmatic phenomenon in lithium-ion batteries called the solid electrolyte interphase.

CASL, Westinghouse simulate neutron behavior in AP1000 reactor core

February 19, 2014 8:06 am | News | Comments

Scientists and engineers developing more accurate approaches to analyzing nuclear power reactors have successfully tested a new suite of computer codes that closely model neutronics, the behavior of neutrons in a reactor core. A team from Westinghouse used the Virtual Environment for Reactor Applications core simulator (VERA-CS) to analyze its AP1000 advanced pressurized water reactor (PWR).

Scientists successfully test code that models neutrons in reactor core

February 19, 2014 7:15 am | News | Comments

Technical staff at Westinghouse Electric Company LLC, supported by a light water reactor research team at Oak Ridge National Laboratory, have used a new core simulator to analyze its AP1000 advanced pressurized water reactor. The testing focused on modeling the startup conditions and its “neutronics”: the behavior of neutrons in a reactor core.

Scientists find more precise way to measure neutron lifetime

February 5, 2014 12:32 pm | News | Comments

A team NIST scientists, with collaborators elsewhere, has achieved a five-fold reduction in the dominant uncertainty in an experiment that measured the mean lifetime of the free neutron, resulting in a substantial improvement of previous results. However, the accomplishment reveals a puzzling discrepancy when compared to different method, and researchers are planning to re-run the experiment in upgraded form.

Advertisement

ORNL, Local Motors sign CRADA to enable rapid design, manufacturing of vehicles

January 30, 2014 8:14 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Local Motors Inc. and Oak Ridge National Laboratory have signed a new partnership to develop and deliver technology to produce the world’s first production 3-D printed vehicle. The CRADA between Local Motors and ORNL will explore making vehicle construction more efficient, including lower production time, costs and part count, coupled with higher standards of control, safety, aesthetics and mechanical flexibility.

Study advances quest for better superconducting materials

January 28, 2014 7:37 am | News | Comments

Nearly 30 years after the discovery of high-temperature superconductivity, many questions remain, but an Oak Ridge National Laboratory team is providing insight that could lead to better superconductors. Their work examines the role of chemical dopants, which are essential to creating high-temperature superconductors.

Researchers invent “sideways” approach to 2-D hybrid materials

January 10, 2014 7:48 am | News | Comments

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.

Comprehensive phonon “map” offers direction for engineering new thermoelectric devices

January 9, 2014 7:48 am | News | Comments

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.

Supercomputers help identify key molecular switch that controls cell behavior

December 17, 2013 2:53 pm | News | Comments

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.

ORNL devises recipe to fine-tune diameter of silica rods

December 16, 2013 3:22 pm | News | Comments

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.

Energy savings in 3-D

November 21, 2013 7:37 am | News | Comments

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.

Chaotic physics in ferroelectrics hints at brain-like computing

November 19, 2013 7:20 am | News | Comments

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.

Study uses neutron scattering, supercomputing to demystify biofuel production

November 14, 2013 7:23 am | News | Comments

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.

Researchers make strides toward a copper oxide solar cell

October 31, 2013 7:53 am | News | Comments

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.

Neutrons, electrons and theory reveal secrets of natural gas reserves

October 28, 2013 3:08 pm | News | Comments

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.

The science of scents

September 19, 2013 8:21 am | News | Comments

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.

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading