Plasmon coupling of R6G-linked gold nanoparticle assemblies for surface-enhanced Raman spectroscopy
Plasmon coupling of R6G-linked gold nanoparticle assemblies for surface-enhanced Raman spectroscopy
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DOI：
10.1016/j.vibspec.2011.09.006
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发表时间：
2011-11-01
影响因子：
2.5
通讯作者：
Jung, SungSoo
中科院分区：
文献类型：
--
作者：
Rigo, Maria Veronica;Seo, Jaetae;Jung, SungSoo
本文研究了罗丹明6G （R6G）连接金（Au）组件的表面增强拉曼散射（SERS）。用金纳米颗粒制备的纳米组件直径(D)约为5-40 nm，颗粒间间隙约为0.03-0.2 2d。分别。r6g连接的Au组装体在较短波长区域表现出较弱的局域表面等离子体共振（LSPR）模式的谱移，在较长波长区域表现出较大的分数红移δ λ，约为0.07-0.47 λ (o)。在较长波长区域的LSPR模式与785 nm附近的光激发的共振光谱耦合，以及高度局域化的热点，可以支持r6g连接的Au组件的较大SERS增强。(C) 2011 Elsevier B.V.版权所有
This paper presents the study of surface-enhanced Raman scattering (SERS) for Rhodamine 6G (R6G)-linked gold (Au) assemblies. The nano-assemblies fabricated with Au nanoparticles, having diameters (D) of similar to 5-40 nm, possessed interparticle gaps of similar to 0.03-0.2D. respectively. The R6G-linked Au assemblies displayed weak spectral shifts of localized surface plasmon resonance (LSPR) mode at shorter wavelength region and large fractional red-shifts Delta lambda similar to 0.07-0.47 lambda(o) at longer wavelength region. The resonant spectral coupling of the nano-assemblies LSPR mode at the longer wavelength region and the optical excitation at similar to 785 nm, in addition to the highly localized hot spots, could support the large SERS enhancement of R6G-linked Au assemblies. (C) 2011 Elsevier B.V. All rights reserved.