气候变化领域集成服务门户(CCPortal): Self-catalytic growth of one-dimensional materials within dislocations in gold

CCPortal

DOI	10.1073/pnas.2107930118
	Self-catalytic growth of one-dimensional materials within dislocations in gold
	Portal L.; Polishchuk I.; Khristosov M.K.; Katsman A.; Pokroy B.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:39
英文摘要	Dislocations in metals affect their properties on the macro- and the microscales. For example, they increase a metal’s hardness and strength. Dislocation outcrops exist on the surfaces of such metals, and atoms in the proximity of these outcrops are more loosely bonded, facilitating local chemical corrosion and reactivity. In this study, we present a unique autocatalytic mechanism by which a system of inorganic semiconducting gold(I) cyanide nanowires forms within preexisting dislocation lines in a plastically deformed Au-Ag alloy. The formation occurs during the classical selective dealloying process that forms nanoporous Au. Nucleation of the nanowire originates at the surfaces of the catalytic dislocation outcrops. The nanowires are single crystals that spontaneously undergo layer-by-layer one-dimensional growth. The continuous growth of nanowires is achieved when the dislocation density exceeds a critical value evaluated on the basis of a kinetic model that we developed. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Crystal growth; Dislocations; Nanoporous gold; Nanowires
语种	英语
scopus关键词	alloy; gold cyanide; gold nanoparticle; nanowire; silver; Article; catalysis; crystallization; dislocation; kinetics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238368
作者单位	Department of Materials Science and Engineering, Technion–Israel Institute of Technology, Haifa, 32000, Israel; Russell Berrie Nanotechnology Institute, Technion–Israel Institute of Technology, Haifa, 32000, Israel
推荐引用方式 GB/T 7714	Portal L.,Polishchuk I.,Khristosov M.K.,et al. Self-catalytic growth of one-dimensional materials within dislocations in gold[J],2021,118(39).
APA	Portal L.,Polishchuk I.,Khristosov M.K.,Katsman A.,&Pokroy B..(2021).Self-catalytic growth of one-dimensional materials within dislocations in gold.Proceedings of the National Academy of Sciences of the United States of America,118(39).
MLA	Portal L.,et al."Self-catalytic growth of one-dimensional materials within dislocations in gold".Proceedings of the National Academy of Sciences of the United States of America 118.39(2021).