Polyhedral to nearly spherical morphology transformation of silver microcrystals grown from vapor phase

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	Polyhedral to nearly spherical morphology transformation of silver microcrystals grown from vapor phase
	Li, CR ; Lu, NP ; Mei, J ; Dong, WJ ; Zheng, YY ; Gao, L ; Tsukamoto, K ; Cao, ZX
刊名	JOURNAL OF CRYSTAL GROWTH
	2011
卷号	314 期号:1 页码:324
关键词	SHAPE-CONTROLLED SYNTHESIS METAL NANOCRYSTALS SURFACE NANOPARTICLES TEMPERATURE GOLD MICROSTRUCTURES
ISSN号	0022-0248
通讯作者	Li, CR (reprint author), Zhejiang Sci Tech Univ, Dept Phys, Minist Educ, Hangzhou 310018, Zhejiang, Peoples R China.
中文摘要	Silver microcrystals of various shapes were grown from co-evaporation of Ag(2)O and SiO powders in the nominal evaporating temperature range (heat source temperature) from 800 to 1200 degrees C under a reductive atmosphere. Pathways for the polyhedral to nearly spherical morphology transformation were established. At evaporating temperatures below 900 degrees C the polyhedral crystals are generally bounded by {1 1 1}-facets and {1 0 0}-facets. With increase in evaporation temperature facets of the {1 1 0}-, {2 1 0}- and {3 1 0}-families come forth successively, that make the Ag polyhedron microctystals transform into nearly spherical microcrystals. A mechanism based on the recession of {1 0 0} or {1 1 0} steps induced by the solvent SiO(x) (x similar to 2.0), which modifies the growth kinetics, is proposed to explain the emergence of (2 1 0)- and (3 1 0)-facets at high temperatures. By evaporating at 1200 degrees C, smooth-looking spherical Ag crystals with 6 nm multi-layered steps on the {1 1 1} facets were obtained. These results are also of significant industry relevance when preparation of noble metal particles with high-index facets is of concern. (C) 2010 Elsevier B.V. All rights reserved.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10874153, 50772100, 10974227, 20701033]; Science Foundation of Zhejiang Sci-Tech University; Innovation Research Project for Graduate Student of Zhejiang Province [YK 2009051]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/51137]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, CR,Lu, NP,Mei, J,et al. Polyhedral to nearly spherical morphology transformation of silver microcrystals grown from vapor phase[J]. JOURNAL OF CRYSTAL GROWTH,2011,314(1):324.
APA	Li, CR.,Lu, NP.,Mei, J.,Dong, WJ.,Zheng, YY.,...&Cao, ZX.(2011).Polyhedral to nearly spherical morphology transformation of silver microcrystals grown from vapor phase.JOURNAL OF CRYSTAL GROWTH,314(1),324.
MLA	Li, CR,et al."Polyhedral to nearly spherical morphology transformation of silver microcrystals grown from vapor phase".JOURNAL OF CRYSTAL GROWTH 314.1(2011):324.