Electromagnetic-Field Enhancement and Energy Transfer Effects on Photoluminescence inAu/PMMA/CdSe-Nanoparticle Multilayers
Electromagnetic-Field Enhancement and Energy Transfer Effects on Photoluminescence inAu/PMMA/CdSe-Nanoparticle Multilayers
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电磁场增强和能量转移对 Au/PMMA/CdSe-纳米颗粒多层膜中光致发光的影响
DOI：
10.1143/jpsj.80.014704
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
and H. Yanagi
中科院分区：
文献类型：
--
作者：
M. Kawai;A. Yamamoto;and H. Yanagi
我们报道了Au/聚甲基丙烯酸甲酯(PMMA)/ cdse纳米颗粒（NP）多层膜中的光致发光（PL）和时间分辨PL光谱是Au膜和CdSe-NP单层之间距离的函数。随着Au-CdSe距离的减小，PL强度先增强后急剧降低。相反，PL衰减时间单调减小。这些结果基本上可以从电磁场增强效应和金局域表面等离子体的能量转移效应两方面来解释。
We report photoluminescence (PL) and time-resolved PL spectra in Au/poly(methyl methacrylate) (PMMA)/CdSe-nanoparticle (NP) multilayers as a function of the distance between the Au film and the CdSe-NP monolayer. With a decrease in Au–CdSe distance, the PL intensity was enhanced slightly, and then it decreased dramatically. Conversely, the PL decay time decreased monotonically. These results can be explained basically by considering both the electromagnetic-field enhancement effect and the energy transfer effect of the Au localized surface plasmons.