Gold Mesostructures with Tailored Surface Topography and Their Self-Assembly Arrays for Surface-Enhanced Raman Spectroscopy
Gold Mesostructures with Tailored Surface Topography and Their Self-Assembly Arrays for Surface-Enhanced Raman Spectroscopy
复制标题
具有定制表面形貌的金介观结构及其用于表面增强拉曼光谱的自组装阵列
DOI：
10.1021/nl103161q
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发表时间：
2010-12-01
期刊：
影响因子：
10.8
通讯作者：
Hahn, Horst
中科院分区：
文献类型：
--
作者：
Fang, Jixiang;Du, Shuya;Hahn, Horst
我们报告了一个简易的粒子介导的聚集协议，通过二次成核和生长过程合成“海胆”状的金介观粒子与定制的表面形貌。令人惊讶的是，这些多尖端Au介观粒子能够在Si衬底上自组装成单层或多层阵列，在大面积上具有令人信服的再现性和均匀性。拉曼测量表明，这些海胆状多尖端金介观粒子表现出高增强的表面增强拉曼散射（SERS）。此外，海胆状的介观粒子阵列显示了进一步增强的SERS的1或2个数量级以上的个别介观粒子由于形成额外的热点之间的颗粒。目前的协议脱颖而出，作为一个潜在的有趣的方法，制造技术上重要的SERS传感器。
We report a facile particle mediated aggregation protocol to synthesize "sea urchin"-like gold mesoparticles with tailored surface topography via a secondary nucleation and growth process. Surprisingly, these multitip Au mesoparticles are capable of self-assembling into monolayer or multiple layer arrays on Si substrates with a convincing reproducibility and homogeneity over large areas. Raman measurements show that these individual sea urchin-like multitipped gold mesoparticles exhibit a high enhancement of surface-enhanced Raman scattering (SERS). In addition, the sea urchin-like mesoparticle arrays display a further enhancement of SERS by 1 or 2 orders of magnitude over the individual mesoparticle due to the formation of additional hot spots between the particles. The current protocol stands out as a potentially interesting approach for the fabrication of technologically important SERS-based sensors.