Researchers at the Department of Energy's SLAC National Accelerator Laboratory. Stanford University, and Denmark Technical University have designed a cutting-edge X-ray microscope capable of directly observing sound waves at the tiniest of scales—the lattice level within a crystal. These findings, published last week in Proceedings of the National Academy of Sciences, could change the way scientists study ultrafast changes in materials and the resulting properties.
Proceedings of the National Academy of SciencesResearchers at the Department of Energy's SLAC National Accelerator Laboratory. Stanford University, and Denmark Technical University have designed a cutting-edge X-ray microscope capable of directly observing sound waves at the tiniest of scales—the lattice level within a crystal. These findings, published last week in, could change the way scientists study ultrafast changes in materials and the resulting properties.
"The atomic structure of crystalline materials gives rise to their properties and associated 'use-case' for an application," said one of the researchers, Leora Dresselhaus-Marais, an assistant professor at Stanford and SLAC. "The crystalline defects and atomic scale displacements describe why some materials strengthen while others shatter in response to the same force. Blacksmiths and semiconductor manufacturing have perfected our ability to control some types of defects, however, few techniques today can image these dynamics inIn this new work, the team generated soundwaves in a, then used the new X-ray microscope they developed to directly image the subtle distortions inside the crystalline lattice.
The researchers placed a special X-ray lens along the beam diffracted by the crystalline lattice to filter out the"perfectly packed" portion of the crystal and zero in on distortions in the crystal's structure caused by the sound wave and defects.
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