Pt/Fe3O4 Core/Shell Triangular Nanoprisms by Heteroepitaxy: Facet Selectivity at the Pt-Fe3O4 Interface and the Fe3O4 Outer Surface

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Pt/Fe3O4 Core/Shell Triangular Nanoprisms by Heteroepitaxy: Facet Selectivity at the Pt-Fe3O4 Interface and the Fe3O4 Outer Surface
	Jiang, MW; Liu, W; Yang, XL; Jiang, Z; Yao, T; Wei, SQ; Peng, XG; Wei, SQ (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China.
	2015
发表期刊	ACS NANO
ISSN	1936-0851
卷号	9 期号:11 页码:10950—10960
文章类型	期刊文献
摘要	Pt/Fe3O4 core/shell triangular nanoprisms were synthesized using seed-mediated heteroepitaxy. Their well-defined shape, facets, and ordered-assembly allowed detailed analysis of mechanism of the heteroepitaxy. At the Pt-Fe3O4 interface, existence of both lattice and chemical mismatch resulted in facet-selective epitaxy along (111) directions of two lattices. X-ray absorption fine structure measurements demonstrated that the Pt seed nanocrystals were composed of an iron-rich Pt-Fe metallic thin layer sandwiched between the Pt core and a Fe-O outer-surface. The Fe-O outer-surface of the seed nanocrystals presumably offered epitaxial sites for the following deposition of the Fe3O4 shell. Each tip and side of a triangular nanoprism respectively possessed a groove and a ridge, and a (111) plane parallel to the basal planes linked all grooves and ridges. This interesting (111) plane approximately bisected the triangle nanoprisms and located near the Pt-seed. The outer surface of the hybrid nanocrystals was also found to be facet-selective, that is, solely {111} facets of Fe3O4 lattice. These polar {111} facets allowed the surface to be only occupied with high-density iron ions, and thus offered best surface coordination for the electron donating ligands in the solution.
关键词	Metal-oxide Nanocrystals One-pot Synthesis Nanorod Heterostructures Colloidal Nanocrystals Magnetic Nanoparticles Charge Separation Cdse Nanocrystals General-approach Shape Control Iron-oxide
语种	英语
WOS记录号	WOS:000365464800043
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/25022
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Wei, SQ (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China.
推荐引用方式 GB/T 7714	Jiang, MW,Liu, W,Yang, XL,et al. Pt/Fe3O4 Core/Shell Triangular Nanoprisms by Heteroepitaxy: Facet Selectivity at the Pt-Fe3O4 Interface and the Fe3O4 Outer Surface[J]. ACS NANO,2015,9(11):10950—10960.
APA	Jiang, MW.,Liu, W.,Yang, XL.,Jiang, Z.,Yao, T.,...&Wei, SQ .(2015).Pt/Fe3O4 Core/Shell Triangular Nanoprisms by Heteroepitaxy: Facet Selectivity at the Pt-Fe3O4 Interface and the Fe3O4 Outer Surface.ACS NANO,9(11),10950—10960.
MLA	Jiang, MW,et al."Pt/Fe3O4 Core/Shell Triangular Nanoprisms by Heteroepitaxy: Facet Selectivity at the Pt-Fe3O4 Interface and the Fe3O4 Outer Surface".ACS NANO 9.11(2015):10950—10960.

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