To learn more about the chemical processes involved in aging oil paints in microscopic and nanoscale detail, researchers conducted a range of studies that included 3D x-ray imaging of a paint sample. The study could have broader implications for conservation based on the observed chemistry of oil paints. Read more »
Chemical and Morphological Origins of Improved Ion Conductivity in Perfluoro Ionene Chain Extended Ionomers
Resonant x-ray scattering and x-ray absorption spectroscopy with elemental sensitivity unravel structural features tied to water–ion domains and discern sulfur-containing groups in sulfonated ionomers, which help delineate chemical factors controlling their phase-separated morphology and governing ion transport. Read more »
Microelectronics Town Hall Looks Beyond Moore’s Law
On August 16, Berkeley Lab hosted a town hall on future research and collaboration opportunities in microelectronics—a deceptively simple catchword that encompasses the full range of integrated developments needed to push beyond Moore’s Law. Eli Rotenberg gave one of several short talks about how the ALS fits into this effort. Read more »
Facility News and Shutdown Recap: Summer 2019
It’s been a busy summer at the ALS, with developments ranging from the delivery of a new prototype magnet for testing, to the refurbishing of the Building 80 cubicle farm and lounge area. A five-week shutdown checked off several important upgrades and installations, while other Building 6–related projects proceeded in parallel. Read more »
Infrared Nano-Mapping of Local Strain in 2D Materials
Researchers have demonstrated an infrared technique to map and analyze strain in atomically thin crystals of hexagonal boron nitride (hBN) at the nanoscale. This ultrasensitive strain-imaging method could be a promising tool for the examination of low-dimensional materials of interest for electronic and photonic devices. Read more »
Newly Discovered Minerals Reveal Anomalous Origins
Researchers characterized two highly unusual nickel-containing minerals, both unearthed in an ancient geological site in southern central Siberia. The findings extend our understanding of naturally occurring mineral species and varieties and provide useful insights into the environments leading to the formation of potentially valuable mineral ores. Read more »
Renewed Prospects for Rechargeable Mg Batteries
Contrary to previous reports, it’s possible to create a rechargeable battery using magnesium ions if the electrode material is first conditioned at high temperature. With twice the charge of lithium ions, magnesium ions hold great promise as the basis for high-energy-density batteries suitable for use in electric vehicles. Read more »
In Memoriam: Charles Fadley, Pioneer in X-Ray Photoelectron Spectroscopy
Charles “Chuck” Fadley, a pioneer in x-ray photoelectron spectroscopy, died at his home in Berkeley on August 1 after several years of treatment for cancer. He held the positions of distinguished professor emeritus of physics at UC Davis, and Advanced Light Source professor and senior faculty scientist at Berkeley Lab. He was 77. Read more »
Sulfur-linked cyanobiphenyl-based liquid crystal dimers and the twist-bend nematic phase
The synthesis and characterization of cyanobiphenyl-based liquid crystal dimers containing sulfur links between the spacer and mesogenic units are described. Resonant x-ray scattering studies of the twist-bend nematic phase at both the carbon and sulfur absorption edges were performed to determine the critical behaviour of the helical pitch at the transition to the nematic phase. Read more »
Tuning Material Properties with Laser Light
Researchers demonstrated that coupled electronic and magnetic properties in a material can be repeatably tuned using laser light. The results suggest the possibility of creating microelectronic devices that use a laser beam to erase and rewrite bits of information in materials engineered for random-access memory and data storage. Read more »
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