Starfruit-shaped gold nanorods and nanowires: synthesis and SERS characterization.
Starfruit-shaped gold nanorods and nanowires: synthesis and SERS characterization.
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DOI：
10.1021/la300218z
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发表时间：
2012-03
期刊：
影响因子：
--
通讯作者：
Leonid Vigderman;E. Zubarev
中科院分区：
文献类型：
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作者：
Leonid Vigderman;E. Zubarev
最近，分支和星形金纳米粒子因其独特的光学和电子特性而受到极大关注，但此类纳米粒子的大多数例子具有零维形状，具有来自准球形核心的不同数量的分支。该报告详细介绍了高阶五支化金颗粒的第一个例子，包括棒状、线状和板状颗粒，它们含有独特的周期性杨桃状形态。这些纳米颗粒是在银离子存在下通过种子介导的方法合成的，该方法基于利用高度纯化的五面体孪晶金纳米棒和纳米线作为种子颗粒。生长的程度可以变化，导致颗粒的等离激元共振发生变化。此外，还演示了杨桃棒在表面增强拉曼光谱（SERS）中的应用。
Recently, branched and star-shaped gold nanoparticles have received significant attention for their unique optical and electronic properties, but most examples of such nanoparticles have a zero-dimensional shape with varying numbers of branches coming from a quasi-spherical core. This report details the first examples of higher-order penta-branched gold particles including rod-, wire-, and platelike particles which contain a uniquely periodic starfruitlike morphology. These nanoparticles are synthesized in the presence of silver ions by a seed-mediated approach based on utilizing highly purified pentahedrally twinned gold nanorods and nanowires as seed particles. The extent of the growth can be varied, leading to shifts in the plasmon resonances of the particles. In addition, the application of the starfruit rods for surface-enhanced Raman spectroscopy (SERS) is demonstrated.