Size dependence of molecular fluorescence enhancement of nanoporous gold
Size dependence of molecular fluorescence enhancement of nanoporous gold
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DOI：
10.1063/1.3323104
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发表时间：
2010-02-15
影响因子：
4
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Lang, X. Y.;Guan, P. F.;Chen, M. W.
我们报道了具有可调纳米孔径的自支撑纳米多孔金的分子荧光增强。吸附在人血清白蛋白包被的纳米多孔金膜上的吲哚菁绿色的荧光强度随着纳米孔尺寸的减小而显著增加。大的荧光增强是由于纳米弯曲产生的强电磁场以及相邻金韧带之间的耦合引起的荧光团的近场增强激发和辐射衰减速率。
We report molecular fluorescence enhancement of free-standing nanoporous gold with tunable nanopore size. The fluorescence intensity of indocynanine green adsorbed on human-serum-albumin-coated nanoporous gold films significantly increases with decreasing nanopore size. The large fluorescence enhancement results from the near-field enhanced excitation and radiative decay rate of fluorophore due to the strong electromagnetic fields produced by nanosized curvatures as well as the coupling between the neighbor gold ligaments.