Showing stories 26-50 out of 163 stories. <<<1 | 2 | 3 | 4 | 5 | 6>>>
28-Apr-2015 Direct visualization of magnetoelectric domains
A novel microscopy technique called magnetoelectric force microscopy was developed to detect the local cross-coupling between magnetic and electric dipoles. Combined experimental observation and theoretical modeling provide understanding on how a bulk linear magnetoelectric effect can be realized in a new family of materials.
27-Apr-2015 Unexpected success
While experimenting with a heat treatment process he modified by eliminating a couple of steps, Klett made a discovery that caused quite a stir and prompted hundreds of inquiries from scientists, academia and industry.
27-Apr-2015 Sticky fingers
Researcher applies materials science techniques to the field of forensics, and some of her research has helped crime scene investigators rebuild fingerprints after they have faded over time.
27-Apr-2015 Insulator-to-metal transition of vanadium dioxide
When heated to just above room temperature, the electrical conductivity of vanadium dioxide abruptly increases by a factor of 10,000. Experiments and high-performance computation reveal how the unusually large lattice vibrations stabilize this highly conductive metallic phase.
23-Apr-2015 Optimizing atomic neighborhoods for speedier chemical reactions
Scientists have discovered that for palladium-nickel catalysts, certain surface characteristics, measured at the atomic level, sped the creation of carbon dioxide from carbon monoxide. This type of atomic detail has not been available by traditional studies and can aid the cycle of catalyst design by optimizing for structural parameters at the nearest neighbor level of an atomic environment.
22-Apr-2015 ICARUS neutrino experiment to move to Fermilab
A group of scientists led by Nobel laureate Carlo Rubbia will transport the world's largest liquid-argon neutrino detector across the Atlantic Ocean to its new home at the US Department of Energy's Fermi National Accelerator Laboratory.
22-Apr-2015 Multimetal nanoframes improve catalyst performance
Researchers synthesized a highly active and durable class of electrocatalysts by exploiting the structural evolution of solid Pt-Ni bimetallic nanocrystals into porous cage-like structures or nanoframes. This approach to synthesizing the material is a significant advance towards realizing electrocatalysts with superior catalytic properties and lower cost.
20-Apr-2015 SLAC and Stanford's James D. Bjorken receives 2015 High Energy and Particle Physics Prize
James D. Bjorken, a theoretical physicist and professor emeritus at the Department of Energy's SLAC National Accelerator Laboratory and at Stanford University, has been awarded the 2015 High Energy and Particle Physics Prize of the European Physical Society. Along with four other scientists, he was honored for theoretical work that revolutionized our understanding of the internal structure of the proton.
13-Apr-2015 Researchers create a new map of invisible dark matter
Scientists on the Dark Energy Survey, including researchers from the Department of Energy's SLAC National Accelerator Laboratory, have released the first in a series of dark matter maps of the cosmos. These maps, created with one of the world's most powerful digital cameras, are the largest contiguous maps created at this level of detail, and will improve our understanding of dark matter's role in the formation of galaxies.
13-Apr-2015 Long-sought magnetic mechanism observed in exotic hybrid materials
Scientists have measured the subatomic intricacies of an exotic phenomenon first predicted more than 60 years ago. This so-called van Vleck magnetism is the key to harnessing the quantum quirks of topological insulators -- hybrid materials that are both conducting and insulating -- and could lead to unprecedented electronics.
6-Apr-2015 'Explosive' atom movement is new window into growing metal nanostructures
Scientists at the US Department of Energy's Ames Laboratory expected to see slow, random movement when they dropped lead atoms on a lead-on-silicon surface. 'But what we saw? BOOM! Fast, explosive and organized!' said Michael Tringides, Ames Laboratory physicist. The unusual atom movement may represent a new way to grow perfect, tiny metal nanostructures for nanostransistors, nanoswitches, and nanomagnets.
25-Mar-2015 Protein shake-up
For living organisms proteins are an essential part of their body system and are needed to thrive. In recent years, a certain class of proteins has challenged researchers' conventional notion that proteins have a static and well-defined structure.
25-Mar-2015 A tale of 2 colliders, 1 thesis, 2 awards -- and a physics mystery
Dennis Perepelitsa, a physicist exploring the mysteries of nuclear physics at RHIC and the LHC, has the distinction of being the first person to earn outstanding Ph.D. thesis awards from both research communities. His Ph.D. work, based on complementary data collected at the PHENIX and ATLAS detectors, showcased intriguing findings and an ongoing mystery that is guiding part of the research programs at both machines now.
20-Mar-2015 Organic photovoltaics experiments showcase HPC 'superfacility' concept
A collaborative effort linking the Advanced Light Source at Lawrence Berkeley National Laboratory with supercomputing resources at NERSC and the Oak Ridge Leadership Computing Facility is yielding exciting results in organic photovoltaics research that could transform the way researchers use these facilities and improve scientific productivity in the process.
18-Mar-2015 Scientists watch quantum dots 'breathe' in response to stress
Researchers at the Department of Energy's SLAC National Accelerator Laboratory watched nanoscale semiconductor crystals expand and shrink in response to powerful pulses of laser light. This ultrafast 'breathing' provides new insight about how such tiny structures change shape as they start to melt -- information that can help guide researchers in tailoring their use for a range of applications.
18-Mar-2015 Nanostructure complex materials modeling
Brookhaven physicist Simon Billinge illustrates how advances in computing and applied mathematics can improve the predictive value of models used to design new materials.
17-Mar-2015 Part II, Tackling grand challenges in geochemistry: Q&A with Andrew Stack
In this Q&A Andrew Stack, a geochemist at the Department of Energy's Oak Ridge National Laboratory, advances understanding of the dynamics of minerals underground. Stack and his team make discoveries that will help to improve our understanding of a wide range of energy-related issues, such as geologic storage of carbon dioxide, oil and gas discovery and development, and remediation of toxic contaminants. His current research spans three disciplines -- geology, chemistry and computing.
17-Mar-2015 Granular data processing on HPCs using an event service
Brookhaven Lab/ATLAS physicist Torre Wenaus describes an effort to trickle small 'grains' of data generated by the ATLAS experiment at the Large Hadron Collider (LHC) in Europe into small pockets of unused supercomputing time, sandwiched between big jobs on high-performance supercomputers.
10-Mar-2015 Possible rare dwarf galaxies found orbiting Milky Way
Researchers have discovered a set of eight celestial objects orbiting our home galaxy, the Milky Way, that appear to be rare dwarf satellite galaxies. Dwarf galaxies are the smallest known galaxy structures and may hold the key to understanding dark matter.
The Department of Energy's Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time.