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Nature Materials 杨培东 纳米晶种指导外延生长第二种金属
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http://www.nature.com/nmat/journ ... /full/nmat1957.html Shaping binary metal nanocrystals through epitaxial seeded growth Susan E. Habas1,2, Hyunjoo Lee1,2, Velimir Radmilovic2, Gabor A. Somorjai1,2 & Peidong Yang1,2 -------------------------------------------------------------------------------- AbstractMorphological control of nanocrystals has become increasingly important, as many of their physical and chemical properties are highly shape dependent. Nanocrystal shape control for both single- and multiple-material systems, however, remains empirical and challenging. New methods need to be explored for the rational synthetic design of heterostructures with controlled morphology. Overgrowth of a different material on well-faceted seeds, for example, allows for the use of the defined seed morphology to control nucleation and growth of the secondary structure. Here, we have used highly faceted cubic Pt seeds to direct the epitaxial overgrowth of a secondary metal. We demonstrate this concept with lattice-matched Pd to produce conformal shape-controlled core–shell particles, and then extend it to lattice-mismatched Au to give anisotropic growth. Seeding with faceted nanocrystals may have significant potential towards the development of shape-controlled heterostructures with defined interfaces. 纳米晶体的形貌控制非常重要，因为纳米晶体很多物理和化学的性质是与形貌直接相 关的。通常纳米晶体的形貌控制还主要是靠经验，并且很有挑战性。这篇刚online的自 然材料的文章中，yang'pei'dong他们利用立方Pt的纳米晶种指导外延生长第二种金属 。首先是利用这种方法生长结构和Pt一致的Pd的核壳结构，然后衍生到晶格不匹配的金的择优取向生长。非常的有意思。这种方法可以用来发展可控界面的多相结构的制备。 http://www.nature.com/nmat/journal/vaop/ncurrent/full/nmat1957.html |
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