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 »
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.
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 »