Richard Marie-Ingrid, Labat Stéphane, Dupraz Maxime, Carnis Jérôme, Gao Lu, Texier Michaël, Li Ni, Wu Longfei, Hofmann Jan P, Levi Mor, Leake Steven J, Lazarev Sergey, Sprung Michael, Hensen Emiel J M, Rabkin Eugen, Thomas Olivier
Univ. Grenoble Alpes, CEA Grenoble, IRIG/MEM/NRX, Grenoble 38054, France.
ESRF - The European Synchrotron, 71 Avenue des Martyrs, Grenoble 38000, France.
ACS Nano. 2023 Mar 28;17(6):6113-6120. doi: 10.1021/acsnano.3c01306. Epub 2023 Mar 17.
At the nanoscale, the properties of materials depend critically on the presence of crystal defects. However, imaging and characterizing the structure of defects in three dimensions inside a crystal remain a challenge. Here, by using Bragg coherent diffraction imaging, we observe an unexpected anomalous {110} glide plane in two Pt submicrometer crystals grown by very different processes and having very different morphologies. The structure of the defects (type, associated glide plane, and lattice displacement) is imaged in these faceted Pt crystals. Using this noninvasive technique, both plasticity and unusual defect behavior can be probed at the nanoscale.
在纳米尺度下，材料的性质严重依赖于晶体缺陷的存在。然而，对晶体内部三维缺陷结构进行成像和表征仍然是一项挑战。在此，通过使用布拉格相干衍射成像，我们在通过非常不同的过程生长且具有非常不同形态的两个铂亚微米晶体中观察到一个意想不到的异常{110}滑移面。在这些多面铂晶体中对缺陷的结构（类型、相关滑移面和晶格位移）进行了成像。利用这种非侵入性技术，可以在纳米尺度上探究可塑性和异常的缺陷行为。
