Faradaurate Nanomolecules: A Superstable Plasmonic 76.3 kDa Cluster
Faradaurate Nanomolecules: A Superstable Plasmonic 76.3 kDa Cluster
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DOI：
10.1021/ja207992r
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发表时间：
2011-12-07
影响因子：
15
通讯作者：
Dass, Amala
中科院分区：
文献类型：
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作者：
Dass, Amala
关于纳米级贵金属粒子的等离子体光学特性的出现的信息有限，部分原因是制备用于系综测量的均匀材料的问题。在这里，我们报告了鉴定，分离，质谱和光学表征的76.3 kDa硫代酸保护金纳米颗粒。这个巨大的分子比任何金属簇化合物都要大得多，这些化合物具有直接的金属对金属键，以前被称为均质分子物质，并且是第一个表现出清晰的等离子体特性的分子。在纳米分子中观察到的等离子体出现现象引起了极大的兴趣，因此，获得绝对均匀和特征的样品对于确定它们的起源至关重要。
Information on the emergence of the characteristic plasmonic optical properties of nanoscale noble-metal particles has been limited, due in part to the problem of preparing homogeneous material for ensemble measurements. Here, we report the identification, isolation, and mass spectrometric and optical characterization of a 76.3 kDa thiolate-protected gold nanoparticle. This giant molecule is far larger than any metal-cluster compound, those with direct metal-to-metal bonding, previously known as homogeneous molecular substances, and is the first to exhibit clear plasmonic properties. The observed plasmon emergence phenomena in nanomolecules are of great interest, and the availability of absolutely homogeneous and characterized samples is thus critical to establishing their origin.