Highly Reproducible Surface-Enhanced Raman Scattering on a Capillarity-Assisted Gold Nanoparticle Assembly
Highly Reproducible Surface-Enhanced Raman Scattering on a Capillarity-Assisted Gold Nanoparticle Assembly
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DOI：
10.1002/adfm.201100641
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发表时间：
2011-09-09
影响因子：
19
通讯作者：
Lee, Shuit-Tong
中科院分区：
文献类型：
--
作者：
Que, Ronghui;Shao, Mingwang;Lee, Shuit-Tong
利用干净的金纳米颗粒（NPs）制备了一种基于毛细管辅助组装的高性能表面增强拉曼散射（SERS）衬底。该方法可以实现大面积均匀装配，克服径向分布的不均匀性，优于微通道方式。这种密集排列的金NPs组装具有高再现性和3 × 10（10）的拉曼增强因子，这是由相邻金NPs引起的强电磁场耦合引起的。点对点SERS信号表明，在浓度为1 × 10(-10) M时，罗丹明6G的主要拉曼振动模式（1310、1361、1509、1650 cm(-1)）的强度相对标准偏差（RSD）始终小于20%，具有良好的空间均匀性和重复性。苏丹红染料在1 × 10(-8) M浓度下的SERS信号也具有较高的重现性和较低的RSD
A facile method based on capillarity-assisted assembly is used to fabricate high-performance surface-enhanced Raman scattering (SERS) substrates employing clean Au nanoparticles (NPs). This method is better than micro-channel way because the former may supply large-area uniform assembly and overcome the uneven radial distribution. Such densely-arranged assembly of Au NPs exhibits high reproducibility and large Raman enhancement factors of 3 x 10(10), arising from strong electromagnetic field coupling induced by adjacent Au NPs. The spot-to-spot SERS signals show that the relative standard deviation (RSD) in the intensity of the main Raman vibration modes (1310, 1361, 1509, 1650 cm(-1)) of Rhodamine 6G at a concentration of 1 x 10(-10) M are consistently less than 20%, demonstrating good spatial uniformity and reproducibility. The SERS signals of sudan dye at a 1 x 10(-8) M concentration also shows high reproducibility with a low RSD of