摘要:
贵金属纳米颗粒由于其独特的光学及催化性能引起了人们的广泛关注,而这些性能与纳米颗粒的尺寸、形貌、结构组成等密切相关.目前如何有意识地控制晶体生长过程,以得到人们需要的纳米结构和组成,仍具有相当大的挑战性.文章重点介绍了利用具有特定形貌和晶面组成的金纳米棒（Au nanorods）作为种子,借助形成核/壳结构,诱导了Ag,Pd,Pt棒状纳米结构的形成,并实现了对杂化纳米结构光学和催化性能的调控,进一步扩展了贵金属纳米结构的应用范围.作者的研究结果表明,形成杂化纳米结构是性能调控的一种有效方式.
Abstract:
Noble-metal nanoparticles have attracted tremendous interest on account of their merits in optics and catalysis.Their properties are strongly dependent on size,shape and composition.However,it is still a great challenge to control the growth process of metal nanocrystals to achieve a desired shape.In this paper,we decribe the use of single crystalline Au nanorods（NRs） with fixed facets and unique optical properties as seeds to prepare various core-shell hybrid nanostructures,including Au@Pd nanobars,arrow-headed Au NRs,Au nanooctahedra,orange segment-like Au@Ag nanoparticles,Au@Pt island NRs,and Au@PtAg island alloy NRs.The optical and catalytic properties of hybrid nanostructures are regulated via the composition and structure.Our investigations indicate that the formation of hybrid nanostructures is an effective way to tailor the properties of nanomaterials.
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