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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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2楼2010-04-05 05:42:26
wuwt
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