Nanoparticle-containing structures as a substrate for surface-enhanced Raman scattering.
Nanoparticle-containing structures as a substrate for surface-enhanced Raman scattering.
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DOI：
10.1021/la061598c
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发表时间：
2006-09
期刊：
影响因子：
--
通讯作者：
C. Addison;A. Brolo
中科院分区：
文献类型：
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作者：
C. Addison;A. Brolo
通过将衍生玻璃玻片交替浸泡在金纳米颗粒(NPs)和丙二硫醇连接物分子的溶液中，制备了金属纳米结构。合成了由1-17个沉积的金纳米颗粒组成的纳米结构，并用UV-Vis光谱和原子力显微镜对其进行了表征。随后，在两个激发波长(632和785 nm)下获得了恶嗪720的表面增强拉曼散射(SERS)。在632 nm和785 nm激发下，分别观察到9个和13个Np沉积的最大SERS增强。最大增强所需的NP沉积数量的差异归因于不同的波长，这些波长可以在金属衬底内激发出不同的聚集结构。因此，这些含NP的结构可以通过改变NP沉积的数量来对所使用的激发源产生最大的SERS增强。
Metallic nanostructures were prepared through the alternate immersion of derivatized glass slides in solutions of gold nanoparticles (NPs) and a propanedithiol linker molecule. Nanostructures consisting of 1-17 depositions of gold NPs were synthesized, and these substrates were characterized using UV-vis spectroscopy and atomic force microscopy. Subsequently, the surface-enhanced Raman scattering (SERS) of oxazine 720 was obtained at two excitation wavelengths (632 and 785 nm) from all substrates. Maximum SERS enhancement was observed for 9 and 13 NP depositions for 632 and 785 nm excitations, respectively. The difference in the number of NP depositions required for maximum enhancement is attributed to different wavelengths which can excite distinct aggregate structures within the metallic substrate. Therefore, these NP-containing structures can be "tuned" to yield maximum SERS enhancement for the excitation source being used by varying the number of NP depositions.