Speeding up a camera shutter a million million times enables researchers to understand how materials move heat around and is a major step in advancing sustainable energy applications. Researchers are coming to understand that the best-performing materials in sustainable energy applications, such
At slow shutter speeds, the atomic structure of GeTE looks ordered but blurred. Faster exposures reveal a clear intricate pattern of dynamic displacements. Credit: Jill Hemman/ORNL, U.S. Dept. of Energy
Speeding up a camera shutter a million million times enables researchers to understand how materials move heat around and is a major step in advancing sustainable energy applications. Researchers are coming to understand that the best-performing materials in sustainable energy applications, such as converting sunlight or waste heat to electricity, often use collective fluctuations of clusters of atoms within a much larger structure. This process is often referred to as “dynamic disorder.
Researchers at Columbia Engineering and Université de Bourgogne report that they have developed a new kind of “camera” that can see the local disorder. Its key feature is a variable shutter speed: because the disordered atomic clusters are moving, when the team used a slow shutter, the dynamic disorder blurred out, but when they used a fast shutter, they could see it.
Oak Ridge National Laboratory to measure atomic positions with a shutter speed of around one picosecond, or a million million times faster than normal camera shutters. The study was published on February 20, 2023, in the journal“It’s only with this new vsPDF tool that we can really see this side of materials,” said Simon Billinge, professor of materials science and applied physics and applied mathematics.
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