Surface enhanced Raman scattering from layered assemblies of close-packed gold nanopardicles
Surface enhanced Raman scattering from layered assemblies of close-packed gold nanopardicles
复制标题
DOI：
10.1016/j.aca.2007.09.026
复制
发表时间：
2007-10-29
影响因子：
6.2
通讯作者：
Kim, Seong Kyu
中科院分区：
文献类型：
--
作者：
Jung, Hye Young;Park, Yong-Kyun;Kim, Seong Kyu
描述了一种将亲水性金纳米颗粒在己烷-水界面处有序排列成紧密堆积的二维阵列并随后将这种结构转移到固体基底上的合成方法。通过重复转移过程，形成多层金纳米颗粒膜而不需要连接分子。比较了它们的表面增强拉曼散射（Sers）效率与层数的关系，结果表明，层数和粒径都对Sers现象有影响。从Sers效率对纳米尺度结构的显著依赖性判断，在不混溶界面处形成紧密堆积的纳米颗粒为通过控制颗粒尺寸和膜厚度来制备高活性和相对清洁的Sers基底提供了一条容易的途径。在所研究的样品中，由五层30 nm直径颗粒组装的金纳米颗粒膜显示出最大的Sers效率（C）2007 Elsevier B. V.保留所有权利。
A synthetic method of ordering hydrophilic gold nanoparticles into a close-packed two-dimensional array at a hexane-water interface and subsequent transferring of such structure onto a solid substrate is described. By repeating the transfer process, multilayered gold nanoparticle films are formed without need of linker molecules. Their surface enhanced Raman scattering (SERS) efficiencies are compared as a function of the number of layers, It is shown that both the number of layers and the particle size contribute to SERS phenomenon. judging from the noticeable dependence of SERS efficiency on the nanometer scale architecture, the close-packed nanoparticle formation at an immiscible interface presents a facile route to the preparation of highly active and relatively clean SERS substrates by controlling both the particle size and the film thickness. Among the investigated samples, the gold nanoparticle film assembled with quintuple layers of 30 nm diameter particles showed the maximum SERS efficiency (C) 2007 Elsevier B.V. All rights reserved.