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【请教】核壳结构壳层控制计算问题 已有3人参与
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各位,假设在金属核壳结构A@B中,壳A假设为球形, 直径为6 nm, 如何计算出制备1原子层(1ML)的B壳层所需要的B的量? 谢谢! P.S. 在J. Phys. Chem. C 2008, 112, 1645-1649 文章中, 作者说:“If we assume that the Ni particles are crystallized in a cuboctahedron shape, as suggested by an earlier thermodynamic analysis of fcc nanocrystals using the concept of localized metal bonds (i.e., considering only nearest-neighbor interatomic interactions),and that the Pt shell grows pseudomorphically on the Ni particles as shown in Figure 1d, the amount of Pt atoms in a monolayer shell over a Ni particle with a mean diameter of 4.4 nm is about 26% of the total Ni atoms. If we assume that the Ni core particles are sphere-shaped, the number of Pt atoms required to form a monolayer shell over a 4.4 nm Ni particle is about 20% of the total Ni atoms。 请问怎么计算出来的? |
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