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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
Source PublicationACS NANO
ISSN1936-0851
Volume9Issue:11Pages:10950—10960
Subtype期刊文献
AbstractPt/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.
KeywordMetal-oxide Nanocrystals One-pot Synthesis Nanorod Heterostructures Colloidal Nanocrystals Magnetic Nanoparticles Charge Separation Cdse Nanocrystals General-approach Shape Control Iron-oxide
Language英语
WOS IDWOS:000365464800043
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25022
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorWei, SQ (reprint author), Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China.
Recommended Citation
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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