Lattice-Mismatch-Induced Twinning for Seeded Growth of Anisotropic Nano structures
Lattice-Mismatch-Induced Twinning for Seeded Growth of Anisotropic Nano structures
复制标题
晶格失配诱导的孪晶用于各向异性纳米结构的种子生长
DOI：
10.1021/acsnano.5b00475
复制
发表时间：
2015-03-01
期刊：
影响因子：
17.1
通讯作者：
Yin, Yadong
中科院分区：
文献类型：
--
作者：
Wang, Zhenni;Chen, Zhengzheng;Yin, Yadong
由具有各向同性晶体结构的材料合成各向异性纳米结构通常需要使用含有双晶面的晶种来打破晶体对称性并促进优先各向异性生长。因此，控制种子中的孪生对于许多各向异性纳米结构的高产率合成至关重要。在这里，我们展示了一种独特的策略，通过利用两种金属之间的大晶格失配来诱导金属纳米结构中的孪晶以实现各向异性生长。以Au-Cu为例，我们从理论上和实验上证明，将Cu沉积到单晶Au晶种表面可以积聚应变能，从而有效地诱导孪晶面的形成。随后的晶种生长可以生产具有高形状各向异性的铜纳米棒，这是在不使用金晶种的情况下无法实现的。这项工作为各向异性金属纳米结构的制备提供了有效的策略。
Synthesis Of anisotropic nanostructures from materials with isotropic crystal Structures often requires the use of seeds containing twin planes to break the crystalline symmetry and promote the preferential anisotropic growth. Controlling twinning in seeds is therefore critically important for high-yield synthesis of Many anisotropic nanostructures. Here, We demonstrate a unique strategy to induce twinning in metal nanostructures for anisotropic growth by taking advantage of the large lattice mismatch between two metals. By using Au-Cu as an example, we show, both theoretically and experimentally, that deposition of Cu to the surface of single-crystalline Au seeds can build up strain energy, which effectively induces the formation of twin planes. Subsequent seeded growth allows the production of Cu nanorods with high shape anisotropy that is unachievable without the use of Au seeds. This work provides an effective strategy for the preparation of anisotropic metal nanostructures.