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DOI	10.1016/j.scib.2021.02.020
	Direct observation of atomic-level fractal structure in a metallic glass membrane
	Jiang H.; Xu J.; Zhang Q.; Yu Q.; Shen L.; Liu M.; Sun Y.; Cao C.; Su D.; Bai H.; Meng S.; Sun B.; Gu L.; Wang W.
发表日期	2021
ISSN	20959273
英文摘要	Determination and conceptualization of atomic structures of metallic glasses or amorphous alloys remain a grand challenge. Structural models proposed for bulk metallic glasses are still controversial owing to experimental difficulties in directly imaging the atom positions in three-dimensional structures. With the advanced atomic-resolution imaging, here we directly observed the atomic arrangements in atomically thin metallic glassy membranes obtained by vapor deposition. The atomic packing in the amorphous membrane is shown to have a fractal characteristic, with the fractal dimension depending on the atomic density. Locally, the atomic configuration for the metallic glass membrane is composed of many types of polygons with the bonding angles concentrated on 45°–55°. The fractal atomic structure is consistent with the analysis with percolation theory, and may account for the enhanced relaxation dynamics and the easiness of glass transition as reported for the thin metallic glassy films or glassy surface. © 2021 Science China Press
关键词	Atomic-resolution imaging Fractal packing Metallic glass Percolation theory
英文关键词	Amorphous alloys; Atoms; Fractal dimension; Glass; Glass transition; Metals; Solvents; (metallic) glass; Atomic levels; Atomic-resolution imaging; Direct observations; Fractal packing; Fractal structures; Glass membranes; Grand Challenge; Metallics; Percolation theory; Metallic glass
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207446
作者单位	Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; Songshan Lake Materials Laboratory, Dongguan, 523808, China; Department of Materials Science & Engineering, Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China; Qian Xuesen Laboratory of Space Technology, Beijing, 100094, China; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, United States; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Jiang H.,Xu J.,Zhang Q.,et al. Direct observation of atomic-level fractal structure in a metallic glass membrane[J],2021.
APA	Jiang H..,Xu J..,Zhang Q..,Yu Q..,Shen L..,...&Wang W..(2021).Direct observation of atomic-level fractal structure in a metallic glass membrane.Science Bulletin.
MLA	Jiang H.,et al."Direct observation of atomic-level fractal structure in a metallic glass membrane".Science Bulletin (2021).