A powerful soft x-ray microscope captures tomographic images of the genetic material in the nuclei of nerve cells at different stages of maturity. The detailed 3D visualizations show an unexpected connectivity in the genetic material and provide a new understanding of a cell’s evolving architecture. Read more »
When Rocket Science Meets X-Ray Science
Scientists at the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and NASA are using x-rays to explore, via 3D visualizations, how the microscopic structures of spacecraft heat shield and parachute materials survive extreme temperatures and pressures, including simulated atmospheric entry conditions on Mars. Read more »
Self-Assembly of a Programmable DNA Lattice
The use of DNA for nanotechnology has gained interest because it is a highly “programmable” polymer with “sticky ends,” allowing the self-assembly of molecular scaffolds for other proteins and molecules. Their high-resolution structures will help map new routes toward the rational design of self-assembling 3D DNA crystals. Read more »
Two Basic Mechanisms of Cardiovascular Drugs
The structures of proteins controlling calcium-ion transport through cell membranes have been revealed, bound to two drugs known as calcium channel blockers. The discovery might accelerate the development of safer and more effective drugs for treating cardiovascular disorders such as high blood pressure, chest pain, and irregular heartbeat. Read more »
Altered States in Graphene Heterostructures
ARPES directly reveals for the first time how electronic states are altered when epitaxial graphene is deposited on a substrate of hexagonal boron nitride (h-BN). The interaction between the materials in this heterostructure greatly improves its suitability for advanced, ultralow-power device applications. Read more »
Magnetism Emerges at Wonky Interfaces
Researchers have found a new way to control magnetism at the atomic level that will serve as a model for studying emergent phenomena in other systems. The ability to engineer and tune properties on such small length scales can (eventually) enable us to design exciting new magnetic devices. Read more »
The Smectic Phase of DNA “Nano-Nunchaku”
Researchers designed DNA sequences that self-assemble into a nanoparticle about 50 nm long, composed of two double-stranded DNA duplexes linked together by a single-stranded DNA filament. The nanoparticle resembles nunchaku—a traditional weapon of several martial arts—but 30 million times smaller. Read more »
Evolutionary drivers of thermoadaptation in enzyme catalysis
With early life likely to have existed in a hot environment, enzymes had to cope with an inherent drop in catalytic speed caused by lowered temperature. Here, researchers characterize the molecular mechanisms underlying thermoadaptation of enzyme catalysis in adenylate kinase using ancestral sequence reconstruction spanning 3 billion years of evolution. Read more »
Chemistry on the Edge: Study Pinpoints Most Active Areas of Reactions on Nanoscale Particles
Experiments confirm that structural defects at the periphery are key in catalyst function. The SINS study is an important step in chronicling how the atomic structure of nanoparticles impacts their function as catalysts in chemical reactions. Read more »
Exploring the Structure of Aqueous Solutions with SALSA
Researchers have published a series of papers that open up the possibility of probing hydrogen bonds in aqueous solutions by combining x-ray emission spectroscopy and resonant inelastic soft x-ray scattering, using the specialized Solid and Liquid Spectroscopic Analysis (SALSA) endstation at Beamline 8.0.1. Read more »
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