气候变化领域集成服务门户(CCPortal): Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries

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DOI	10.1126/science.aax6511
	Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries
	Song M.; Zhou G.; Lu N.; Lee J.; Nakouzi E.; Wang H.; Li D.
发表日期	2020
ISSN	0036-8075
起始页码	40
结束页码	45
卷号	367 期号:6473
英文摘要	Natural and synthetic nanoparticles composed of fivefold twinned crystal domains have distinct properties. The formation mechanism of these fivefold twinned nanoparticles is poorly understood. We used in situ high-resolution transmission electron microscopy combined with molecular dynamics simulations to demonstrate that fivefold twinning occurs through repeated oriented attachment of ~3-nanometer gold, platinum, and palladium nanoparticles. We discovered two different mechanisms for forming fivefold twinned nanoparticles that are driven by the accumulation and elimination of strain. This was accompanied by decomposition of grain boundaries and the formation of a special class of twins with a net strain of zero. These observations allowed us to develop a quantitative picture of the twinning process. The mechanisms provide guidance for controlling twin structures and morphologies across a wide range of materials. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	gold nanoparticle palladium nanoparticle platinum nanoparticle crystal structure decomposition analysis electron microscopy in situ measurement induced response molecular analysis nanoparticle Article controlled study crystal structure decomposition diffusion energy high resolution transmission electron microscopy molecular dynamics oriented attachment oscillation particle size physical chemistry priority journal synthesis thermodynamics
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133807
推荐引用方式 GB/T 7714	Song M.,Zhou G.,Lu N.,et al. Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries[J]. Science,2020,367(6473).
APA	Song M..,Zhou G..,Lu N..,Lee J..,Nakouzi E..,...&Li D..(2020).Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries.,367(6473).
MLA	Song M.,et al."Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries".367.6473(2020).