Monodisperse Noble-Metal Nanoparticles and Their Surface Enhanced Raman Scattering Properties
Monodisperse Noble-Metal Nanoparticles and Their Surface Enhanced Raman Scattering Properties
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单分散贵金属纳米粒子及其表面增强拉曼散射特性
DOI：
10.1021/cm800882n
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发表时间：
2008-11-25
影响因子：
8.6
通讯作者：
Gao, Hongjun
中科院分区：
文献类型：
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作者：
Shen, Chengmin;Hui, Chao;Gao, Hongjun
通过在甲苯中直接将相关金属盐与油胺反应，制备了具有窄粒径分布的单分散Au、Ag和Au 3 Pd纳米颗粒（NPs）。油胺在合成中既充当还原剂又充当表面活性剂。这些纳米颗粒的尺寸和形状通过反应温度来调节。疏水性油胺涂覆的NP可以通过用3-巯基丙酸代替油胺而变得水溶性。从Au和Ag纳米颗粒观察到的表面等离子体共振（SPR）和表面增强拉曼散射（Sers）被发现是NP尺寸和表面依赖性的。
Monodisperse Au, Ag, and Au3Pd nanoparticles (NPs) with narrow size distribution are prepared by direct reaction of the related metal salt with oleylamine in toluene. Oleylamine serves as both a reducing agent and a surfactant in the synthesis. The sizes and shape of these NPs are tuned by reaction temperatures. The hydrophobic oleylamine-coated NPs can be made water soluble by replacing oleylamine with 3-mercaptopropionic acid. Both surface plasmonic resonance (SPR) and surface enhanced Raman scattering (SERS) observed from the AU and Ag NPs are found to be NP size- and surface-dependent.