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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 Publication | ACS NANO
 |
| ISSN | 1936-0851 |
| Volume | 9Issue:11Pages:10950—10960 |
| Subtype | 期刊文献 |
| Abstract | 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. |
| Keyword | Metal-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 ID | WOS:000365464800043 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/25022 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Corresponding Author | Wei, 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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| Pt_Fe3O4 Core_Shell （7837KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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