Inverted size-dependence of surface-enhanced Raman scattering on gold nanohole and nanodisk arrays
Inverted size-dependence of surface-enhanced Raman scattering on gold nanohole and nanodisk arrays
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DOI：
10.1021/nl0806163
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发表时间：
2008-07-01
期刊：
影响因子：
10.8
通讯作者：
Wallace, Paul M.
中科院分区：
文献类型：
--
作者：
Yu, Qiuming;Guan, Phillip;Wallace, Paul M.
研究了电子束光刻技术在精确控制尺寸和间距的金纳米孔和纳米盘阵列上的表面增强拉曼散射（SERS）。这些纳米结构在785 nm激发下表现出较强的SERS信号，而在514 nm激发下则没有。当边缘距离保持不变时，纳米孔的增强增强增强，而纳米盘的增强增强随着直径的增加而减弱。结果表明，随着纳米孔直径的增大，局部表面等离子体共振波长的增强结果向近红外区偏移。尺寸上的大公差和纳米孔所限制的空间表明它们有望作为传感、光谱学和光子器件的功能组件使用。
Surface-enhanced Raman scattering (SERS) on gold nanohole and nanodisk arrays with precisely controlled size and spacing fabricated via electron beam lithography was investigated. These nanostructures exhibit strong SERS signals at 785 nm excitation but not at 514 nm. When the edge-to-edge distance is maintained, enhancement increases for nanoholes but decreases for nanodisks as diameter is increased. It is shown that the observed enhancement results from the local surface plasmon resonance wavelength shifts to the near-infrared regime as nanohole diameter increases. The large tolerance on dimensions and the empty space confined by nanoholes suggest promise for their use as a functional component in sensing, spectroscopy, and photonic devices.