Perovskites show great promise to reduce the costs of solar power but are not yet durable enough to be commercially viable. Researchers used simultaneous characterization techniques to understand why a simplified fabrication process works so well, providing key insights to nudge perovskites closer to commercialization. Read more »
Scientists Discover First Nitrogen-Fixing Organelle
In two recent papers, an international team of scientists describe the first known nitrogen-fixing organelle within a eukaryotic cell. The organelle is the fourth example in history of primary endosymbiosis—the process by which a prokaryotic cell is engulfed by a eukaryotic cell and evolves beyond symbiosis into an organelle. Read more »
Nitrogen-fixing organelle in a marine alga
A nitrogen-fixing organelle, or “nitroplast,” has been identified in a marine alga on the basis of intracellular imaging and proteomic evidence. This discovery sheds light on the evolutionary transition from endosymbiont to organelle. The image depicts the cell architecture and synchronized cell division of the alga Braarudosphaera bigelowii with nitroplast UCYN-A (large brown spheres). Read more »
Shedding Light on Sea Creatures’ Secrets
Exactly how does coral make its skeleton, a sea urchin grow a spine, or an abalone form the mother-of-pearl in its shell? A new study at the ALS revealed that this process of biomineralization, which sea creatures use to lock carbon away in their bodies, is more complex and diverse than previously thought. Read more »
Room-Temperature 2D Magnet: Electronic-Structure Insights
Researchers found that small changes in how electron spins interact with each other can make a big difference in the magnetic transition temperatures of 2D magnets. Understanding such factors can help create better magnetic materials for information storage, sensors, medical imaging, and energy-efficient computing. Read more »
Clarifying the FLASH Effect for Cancer Radiation Therapy
To clarify the underlying mechanisms of the FLASH effect, in which the delivery of ultrafast, high-intensity doses of radiation to tumors counterintuitively reduces damage to surrounding healthy cells, researchers directly compared the oxidative effects of conventional and FLASH techniques using x-ray footprinting at the ALS. Read more »
Case Study of Aerosol Particles Influenced by Wildfire
Researchers studied atmospheric aerosols influenced by wildfires in the Pacific Northwest. They examined the connection between particle size, chemical composition, and phase state, in particles collected during the day and at night. The information is important for modeling the effects of wildfire smoke on atmospheric properties. Read more »
ALS in the News (March 2024)
Big Twist Leads to Tunable Energy Gaps in a Bilayer Stack
Researchers found that twisting 2D layers at atypically large angles opens up potentially useful energy gaps in the material’s band structure. The results suggest a new way to tune materials for optoelectronic applications and provide a platform for exploring novel “moiré” phenomena beyond those observed at small twist angles. Read more »
Bifurcation of High- and Low-Energy Electrons in Microbial Metabolism
A class of chemical reaction found only in biology, electron bifurcation channels two electrons from one donor to two separate acceptors, with one electron elevated in energy at the expense of lowering the energy of the second. Researchers used the ALS to study this process in a microbial protein involved in this bioenergetic pathway. Read more »
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