Fan Zhanxi, Chen Ye, Zhu Yihan, Wang Jie, Li Bing, Zong Yun, Han Yu, Zhang Hua
Center for Programmable Materials , School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . Email:
Advanced Membranes and Porous Materials Center , Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia.
Chem Sci. 2017 Jan 1;8(1):795-799. doi: 10.1039/c6sc02953a. Epub 2016 Sep 12.
Metal nanomaterials normally adopt the same crystal structure as their bulk counterparts. Herein, for the first time, the unusual 4H hexagonal Ir, Rh, Os, Ru and Cu nanostructures have been synthesized on 4H Au nanoribbons (NRBs) solution-phase epitaxial growth under ambient conditions. Interestingly, the 4H Au NRBs undergo partial phase transformation from 4H to face-centered cubic (fcc) structures after the metal coating. As a result, a series of polytypic 4H/fcc bimetallic Au@M (M = Ir, Rh, Os, Ru and Cu) core-shell NRBs has been obtained. We believe that the rational crystal structure-controlled synthesis of metal nanomaterials will bring new opportunities for exploring their phase-dependent physicochemical properties and promising applications.
金属纳米材料通常与其块状对应物具有相同的晶体结构。在此，首次在环境条件下通过溶液相外延生长在4H金纳米带（NRBs）上合成了异常的4H六方铱、铑、锇、钌和铜纳米结构。有趣的是，在金属包覆后，4H金NRBs经历了从4H到面心立方（fcc）结构的部分相变。结果，获得了一系列多型4H/fcc双金属Au@M（M = 铱、铑、锇、钌和铜）核壳NRBs。我们相信，金属纳米材料的合理晶体结构控制合成将为探索其相依赖的物理化学性质和有前景的应用带来新的机遇。
