A novel surface-enhanced Raman scattering substrate: Diamond nanopit infilled with gold nanoparticle
A novel surface-enhanced Raman scattering substrate: Diamond nanopit infilled with gold nanoparticle
复制标题
DOI：
10.1016/j.matlet.2014.07.139
复制
发表时间：
2014-11
影响因子：
3
通讯作者：
Jie Song;Shaoheng Cheng;Hongdong Li;Hongyun Guo;Shuping Xu;Weiqing Xu
中科院分区：
文献类型：
--
作者：
Jie Song;Shaoheng Cheng;Hongdong Li;Hongyun Guo;Shuping Xu;Weiqing Xu
本研究利用氧等离子体刻蚀技术在单晶金刚石表面镀上Au膜，制备了一种填充有金纳米颗粒（Au NP）的倒截头形金刚石纳米孔混合结构。以4-巯基吡啶为探针分子，研究了Au-NP/diamond-pit的表面增强拉曼散射（Sers）性能，结果表明，与传统的孤立Au NP相比，该杂化结构可以实现更大的Sers增强因子。这是由于Au NPs的特殊几何结构使入射光场集中度增加，以及Au NPs的局域表面等离子体共振耦合所致。考虑到金刚石的独特性质，金刚石相关杂化结构可以作为一种高性能的Sers基底。
In this study, a hybrid structure of inversely truncated pyramid-shaped diamond nanopits infilled with gold nanoparticle (Au NP) has been fabricated from a Au film coated single crystal diamond by oxygen plasma etching. Surface enhanced Raman scattering (SERS) performances based on the Au-NP/diamond-pit, using 4-Mercaptopyridine as the probe molecule, show that the hybrid structure could realize a larger SERS enhancement factor compared to the conventional isolated Au NPs. This is attributed to the increased concentration of incident light field on the Au NPs due to the special geometric feature, and the coupling of localized surface plasmon resonance from Au NPs. Taking into account the unique properties of diamond, the diamond-related hybrid structure could be used as a kind of high performance SERS substrate.