Simple hexagonal structured gold with eight-coordination formed with ordered structural vacancies

doi:10.1016/j.actamat.2022.117844

IMR OpenIR

	Simple hexagonal structured gold with eight-coordination formed with ordered structural vacancies
	Wang, Xuelu 1,2; Chen, Chunjin 1,2; Jiang, Binbin 1; Duan, Huichao 1,2; Du, Kui 1
通讯作者	Du, Kui(kuidu@imr.ac.cn)
	2022-05-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	229 页码:9
摘要	Phase engineering of nanomaterials attracts increasing research interest, as crystal structures of metals often determine their physical and chemical properties. Metals tend to form close-packed crystal structures to maximize their space filling and atomic coordination numbers due to the isotropic metallic bonding. Hitherto no metals yet crystallize with the simple hexagonal packing which has low coordination number and packing fraction. Here, we fabricate a novel simple hexagonal structured gold through in situ selective etching on ordered Cu-Au intermetallic compound, where the new crystal structure has only 8 nearest neighbors for each atom and a low packing fraction of 0.60. The simple hexagonal structured Au demonstrates an electrical conductivity of 389 S/m, approximately 10(5) times lower than that of face centered cubic structured gold, according to first principles calculation, associated with localized valence electrons. The discovery of simple hexagonal structure suggests that metals can form more diverse crystal structures by changing effective atomic volume, which provides a pathway to engineer new structures of metals for novel physical properties and applications. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Structure Transmission electron microscopy Vacancies Phase transformation Electrical conductivity
资助者	National Key Research and Development Program of China ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science ; National Natural Science Foun-dation of China ; Institute of Metal Research Chinese Academy of Sciences
DOI	10.1016/j.actamat.2022.117844
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFA0700701] ; Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science[2019JH3/30100020] ; National Natural Science Foun-dation of China[91960202] ; National Natural Science Foun-dation of China[52171020] ; National Natural Science Foun-dation of China[51901229] ; Institute of Metal Research Chinese Academy of Sciences[552021-PY07]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000791225200008
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173978
专题	中国科学院金属研究所
通讯作者	Du, Kui
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuelu,Chen, Chunjin,Jiang, Binbin,et al. Simple hexagonal structured gold with eight-coordination formed with ordered structural vacancies[J]. ACTA MATERIALIA,2022,229:9.
APA	Wang, Xuelu,Chen, Chunjin,Jiang, Binbin,Duan, Huichao,&Du, Kui.(2022).Simple hexagonal structured gold with eight-coordination formed with ordered structural vacancies.ACTA MATERIALIA,229,9.
MLA	Wang, Xuelu,et al."Simple hexagonal structured gold with eight-coordination formed with ordered structural vacancies".ACTA MATERIALIA 229(2022):9.