Monodisperse Gold Nanotriangles: Size Control, Large-Scale Self-Assembly, and Performance in Surface-Enhanced Raman Scattering
Monodisperse Gold Nanotriangles: Size Control, Large-Scale Self-Assembly, and Performance in Surface-Enhanced Raman Scattering
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DOI：
10.1021/nn500727w
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发表时间：
2014-06-01
期刊：
影响因子：
17.1
通讯作者：
Liz-Marzan, Luis M.
中科院分区：
文献类型：
--
作者：
Scarabelli, Leonardo;Coronado-Puchau, Marc;Liz-Marzan, Luis M.
Au纳米三角形显示出有趣的纳米等离子体特性，在各个领域具有潜在的应用。然而，由于缺乏产生足够的尺寸和形状单分散性的有效合成方法以及形态稳定性不足，这些应用受到阻碍。我们在这里提出了一个合成和纯化协议，有效地解决这些问题。通过简单地改变实验参数，可以在很宽的范围内调节纳米三角形的尺寸。所获得的单分散性导致扩展的自组装，不仅在电子显微镜网格上，而且在气液界面处，允许转移到厘米大小的基板上。这些扩展的单分子膜表现出有前途的性能作为表面增强的拉曼散射基板，证明苯硫酚检测。
Au nanotriangles display interesting nanoplasmonic features with potential application in various fields. However, such applications have been hindered by the lack of efficient synthetic methods yielding sufficient size and shape monodispersity, as well as by insufficient morphological stability. We present here a synthesis and purification protocol that efficiently addresses these issues. The size of the nanotriangles can be tuned within a wide range by simply changing the experimental parameters. The obtained monodispersity leads to extended self-assembly, not only on electron microscopy grids but also at the air liquid interface, allowing transfer onto centimeter-size substrates. These extended monolayers show promising performance as surface-enhanced Raman scattering substrates, as demonstrated for thiophenol detection.