In order to see the true polarization of ferroelectric materials quickly and efficiently, researchers at Argonne National Laboratory have developed a new technique called charge gradient microscopy. Charge gradient microscopy uses the tip of a conventional atomic force microscope to scrape and collect the surface screen charges.
Scientists at the U.S. Dept. of Energy’s Argonne National Laboratory have discovered a previously unknown phase in a class of superconductors called iron arsenides. This sheds light on a debate over the interactions between atoms and electrons that are responsible for their unusual superconductivity.
A key step in the decades-long mystery of the HIV lifecycle was uncovered using what formerly was thought of as only a supplementary x-ray technique for structural biology. This advances study of HIV as well as highlights a powerful tool to obtain currently unobtainable high-resolution structural determination and characterization of RNA molecules.
No x-ray facility in the world has supported more protein structure research and characterized more proteins than the Advanced Photon Source at Argonne National Laboratory. Soon this 2/3-mile-in-circumference x-ray instrument will get a boost in efficiency that likely will translate into a big boon for the discovery of new pharmaceuticals and the control of genetic disorders and other diseases, as well as advancing the biotech industry.
For more than a quarter of a century, high-temperature superconductors have perplexed scientists who seek to understand the physical phenomena responsible for their unique properties. Thanks to a new study by Argonne National Laboratory, researchers have identified and solved at least one paradox in the behavior of high-temperature superconductors.
A new strategy for building nanoscale constructs uses the binding properties of complementary strands of DNA to attach nanoparticles to each other. A series of controlled steps builds up a layered thin-film nanostructure. Small-angle x-ray scattering analysis has revealed the precise form that the structures adopted, and points to ways of exercising still greater control over the final arrangement.
For scientists to determine if a cell is functioning properly, they often must destroy it with ionizing radiation, which is used in x-ray fluorescence microscopy to provide detail that conventional microscopes can’t match. To address this, Argonne National Laboratory researchers created the R&D 100 Award-winning Bionanoprobe, which freezes cells to “see” at greater detail without damaging the sample.
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.
Researchers at Argonne National Laboratory in collaboration with scientists at Northwestern Univ. are the first to grow graphene on silver which, until now, posed a major challenge to many in the field. Part of the issue has to do with the properties of silver, the other involves the process by which graphene is grown.
In a recent early online edition of Nature Chemistry, Arizona State Univ. scientists, along with colleagues at Argonne National Laboratory, have reported advances toward perfecting a functional artificial leaf. Designing an artificial leaf that uses solar energy to convert water cheaply and efficiently into hydrogen and oxygen is one of the goals of BISfuel.
Lead-free BaTiO3 and KNbO3 ferroelectrics have been known and studied for more than 60 years. However, recent scanning x-ray diffraction studies at Argonne National Laboratory have shown new low-symmetry intermediate phases in these materials that lend a thermotropic character to otherwise well-known phase transitions. The findings show that these transitions in ferroelectrics are closely coupled to the underlying domain microstructure.
Scientists at Argonne National Laboratory attacked a tangled problem by developing a new technique to grow tiny “hairy” materials that assemble themselves at the microscale. The key ingredient is epoxy, which is added to a mixture of hardener and solvent inside an electric cell. Then the scientists run an alternating current through the cell and watch long, twisting fibers spring up. It looks like the way Chia pets grow in commercials.
Getting the blues is rarely a desirable experience—unless you’re a solar cell, that is. Scientists at Argonne National Laboratory and the Univ. of Texas at Austin have together developed a new, inexpensive material that has the potential to capture and convert solar energy—particularly from the bluer part of the spectrum—much more efficiently than ever before.
Humans have for ages taken cues from nature to build their own devices, but duplicating the steps in the complicated electronic dance of photosynthesis remains one of the biggest challenges and opportunities for chemists. Currently, the most efficient methods we have for making fuel from sunlight and water involve rare and expensive metal catalysts. However, that is about to change.
New recommendations for using x-rays promise to speed investigations aimed at understanding the structure of biologically important proteins. In their study, the scientists evaluated options to remedy problems affecting data collection. Scientists who use x-ray beams to study protein crystals face a dilemma: The beams provide the best tool for understanding a protein's structure and biological function, but they often damage the crystal.
A unique solar panel design made with a new ceramic material points the way to potentially providing sustainable power cheaper, more efficiently, and requiring less manufacturing time. It also reaches a four-decade-old goal of discovering a bulk photovoltaic material that can harness energy from visible and infrared light, not just ultraviolet light.
Researchers have made inroads into tackling a bacterium that plagues hospitals and is highly resistant to most antibiotics. They determined the 3-D structure and likely function of a new protein in this common bacterium that attacks those with compromised immune systems.
Leaders in the petascale computing arena in the U.S. and Japan have signed a memorandum of understanding (MOU) establishing a cooperative relationship in support of projects aimed at expanding the use of petascale computing in the scientific and engineering communities. The MOU was signed at SC13.
The universe is a vast and mysterious place, but thanks to high-performance computing technology scientists around the world are beginning to understand it better. They are using supercomputers to simulate how the Big Bang generated the seeds that led to the formation of galaxies such as the Milky Way.
The creation of the next generation of batteries depends on finding materials that provide greater storage capacity. One variety, known as lithium-air (Li-air) batteries, are particularly appealing to researchers because they have a significantly higher theoretical capacity than conventional lithium-ion batteries.
Bug spray, citronella candles, mosquito netting—most people will do anything they can to stay away from insects during the warmer months. But those creepy crawlers we try so hard to avoid may offer substantial solutions to some of life’s problems. Researchers using x-ray technology at the Advanced Photon Source were able to take an inside look at several insects, gathering results that go beyond learning about insect physiology and biology.
Just like people, materials can sometimes exhibit “multiple personalities.” This kind of unusual behavior in a certain class of materials has compelled researchers at Argonne National Laboratory to take a closer look at the precise mechanisms that govern the relationships between superconductivity and magnetism.
An international group of researchers from the U.S. and South Korea have discovered a groundbreaking technique in manufacturing nanostructures that has the potential to make electrical and optical devices smaller. The new patterning technology, called atomic layer lithography, based on a layering technique at the atomic level and relies on a surprising low-tech tool: Scotch Magic tape.
Silicon is the material of choice for most semiconductor applications, but experts have also long recognized an end point for silicon-based technology because of high-temperature degradation and limited electron mobility at increasingly small feature sizes. Diamond is among the next-generation wide band gap (WBG) semiconductor platforms under investigation. However, its superior performance comes at great cost. Argonne National Laboratory and AKHAN Technologies Inc. have developed an alternative called the Miraj Diamond Platform.
Electrostatic charging can be an annoyance at the macroscale; but in development of ion- and electron-optical devices, as well as microelectromechanical systems, this phenomenon can be severely detrimental to performance. In response, Argonne National Laboratory and KLA-Tencor Inc. have designed thin films that can prevent electrostatic charge from accumulating on virtually any surface.