X-ray analyses provided key insights into the copper uptake mechanisms in a new organic-inorganic hybrid material that quickly and selectively removes copper ions from water. The material provides an efficient tool for copper remediation as well as a blueprint for creating other hybrid materials for removing toxic metals from water. Read more »
ALS Work Using XANES
X-ray absorption near-edge structure (XANES) spectroscopy is form of x-ray absorption spectroscopy (XAS) that reveals the structures of molecules bonded to surfaces. It focuses on prominent features in the "near-edge" region of a spectrum (about 30 eV above the K-shell absorption edge). This "fine structure" can be correlated with specific molecular bond types, lengths, and orientations. XANES, also known as near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy, is often performed as part of a STXM experiment.
Researchers used several analytical techniques at the ALS to demonstrate how soft-tissue structures may be preserved in dinosaur bones, countering long-standing scientific dogma that protein-based body parts cannot survive more than one million years. Read more »
A team of scientists used infrared and x-ray imaging performed at the Advanced Light Source to determine the chemical mechanisms that allow soft tissue structures to persist in dinosaur bones—countering the long-standing scientific dogma that protein-based body parts can’t survive more than 1 million years. Read more »
Aided by x-ray absorption spectroscopy at the ALS, researchers from Toyota and the University of Akron have uncovered a new catalysis mechanism to improve oxidation-reduction reactions in certain fuel cells by 40%. This enhancement, based on tin oxide, will support efforts to increase fuel efficiency in electric vehicles. Read more »
Scientists analyzing a tiny carbon-rich pocket inside a meteorite found unexpected chemical signatures. Their findings are the first direct evidence that material from the outer solar system may have traveled inward long before planets formed, providing insight into the early solar system. Read more »
Berkeley Lab has a well-storied expertise in exploring samples of extraterrestrial origin. This research—which has helped us to understand the makeup and origins of objects within and beyond our solar system—stems from long-standing core capabilities in structural and chemical analyses and measurement at the microscale and nanoscale. Read more »
X-ray absorption spectroscopy and other techniques were used to measure the organic chemical components in a pair of meteorites that crashed to Earth in 1998. The study treads new ground in solar system history and asteroid geology, surfacing exciting possibilities for the existence of life elsewhere in Earth’s neighborhood. Read more »
Two wayward space rocks, which separately crashed to Earth in 1998 after circulating in our solar system’s asteroid belt for billions of years, share something else in common: the ingredients for life. They are the first meteorites found to contain both liquid water and a mix of complex organic compounds such as hydrocarbons and amino acids. Read more »
Bimetallic cobalt-platinum (CoPt) nanoparticles are drawing attention in many areas of catalysis as scientists tackle the quest to reduce precious metal content while maintaining optimum catalytic selectivity and reactivity. Researchers explored the role of Pt in Co reducing and oxidizing, and found that the catalytic properties of monometallic and bimetallic nanoparticles of Co are closely related to the oxidation state of Co. Read more »
Elemental and chemical imaging analyses showed that sea salt particles react with water-soluble organic acids in the atmosphere through a unique mechanism which had been overlooked in atmospheric chemistry. The reactions release volatile hydrogen chloride into the atmosphere and leave behind sea salt particles drained of chloride.
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