Self-assembled Ge, Sb and Al nanostructures on graphite: Comparative STM studies

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	Self-assembled Ge, Sb and Al nanostructures on graphite: Comparative STM studies
	Kushvaha, SS ; Yan, Z ; Xiao, W ; Xu, MJ ; Xue, QK ; Wang, XS
刊名	NANOTECHNOLOGY
	2007
卷号	18 期号:14
ISSN号	0957-4484
中文摘要	The growth of Ge, Sb and Al nanostructures on highly oriented pyrolytic graphite ( HOPG) have been studied comparatively using scanning tunnelling microscopy in ultra-high vacuum. Clusters and crystallites of these elements were grown along HOPG steps in the initial stage. But the nanoparticles of these three elements show quite different size distributions and morphological evolution in later growth stages. Using different deposition flux and amount, Ge clusters with self-limiting height, cluster chains and double-layer ramified cluster islands were obtained on HOPG at room temperature ( RT). Compact crystalline Ge islands with high-index facets were observed after annealing at 600 K following RT deposition. Three-dimensional ( 3D) spherical islands, 2D thin films and 1D nanorods of Sb have been synthesized using different fluxes on HOPG at RT. With higher flux and a substrate temperature of 375 K, only crystalline 2D and 1D structures of Sb were obtained. When Al was deposited on HOPG at RT, the growth and coalescence of clusters formed initially result in flat Al crystallites with ( 111) top facet. After more deposition, craters were observed on top of the flattened Al islands resulting from a few smaller islands merging together. The mobile Al islands on HOPG can be pinned by Sb. The morphology difference of observed nanostructures reflects unique energetic and kinetic properties of atoms and clusters of each element.
收录类别	SCI
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52394]
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	Kushvaha, SS,Yan, Z,Xiao, W,et al. Self-assembled Ge, Sb and Al nanostructures on graphite: Comparative STM studies[J]. NANOTECHNOLOGY,2007,18(14).
APA	Kushvaha, SS,Yan, Z,Xiao, W,Xu, MJ,Xue, QK,&Wang, XS.(2007).Self-assembled Ge, Sb and Al nanostructures on graphite: Comparative STM studies.NANOTECHNOLOGY,18(14).
MLA	Kushvaha, SS,et al."Self-assembled Ge, Sb and Al nanostructures on graphite: Comparative STM studies".NANOTECHNOLOGY 18.14(2007).