Increasing the Enhancement Factor in Plasmon-Enhanced Fluorescence with Shell-Isolated Nanoparticles,The Journal of Physical Chemistry C

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Increasing the Enhancement Factor in Plasmon-Enhanced Fluorescence with Shell-Isolated Nanoparticles
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2015-12-01 00:00:00 , DOI: 10.1021/acs.jpcc.5b09215
S. A. Camacho ₁ , P. H. B. Aoki ₂ , P. Albella ₃ , Osvaldo N. Oliveira ₂ , C. J. L. Constantino ₁ , R. F. Aroca _{1,

2}

Affiliation

Three central experimental variables are looked at to increase the observed enhancement factor in plasmon-enhanced fluorescence: nanoparticle size, nanoparticle aggregation, and the sample temperature. The rise in emission intensity is demonstrated here in carefully chosen experimental conditions. First, it is shown that shell-isolated nanoparticles of gold (Au-SHINs) with a core of 100 nm produce a higher enhancement factor than smaller Au-SHINs (with a core of 40 nm) in solution and on Langmuir–Blodgett (LB) films. The enhancement factor is further increased by aggregation of the Au-SHINs in solution, and the findings are supported by finite-difference time-domain (FDTD) computations. Second, the enhancement factor (110-fold) of plasmon-enhanced fluorescence achieved with large Au-SHINs on an LB film of eosin decyl ester (EOSDEC) increases dramatically at low temperatures (170 fold). High enhancement factors are underpinned by a close matching of the plasmon extinction and fluorescence emission.

中文翻译：

壳层分离的纳米粒子增强等离子体增强荧光中的增强因子

研究了三个主要的实验变量，以增加在等离激元增强的荧光中观察到的增强因子：纳米颗粒大小，纳米颗粒聚集和样品温度。在精心选择的实验条件下，证明了发射强度的上升。首先，它显示了在溶液中和在Langmuir-Blodgett（LB）上，壳分离的金纳米颗粒（Au-SHINs）的核心分离度为100 nm，比较小的Au-SHINs（核芯为40 nm）产生更高的增强因子。）电影。通过溶液中Au-SHIN的聚集进一步提高了增强因子，并且该发现得到了时域有限差分（FDTD）计算的支持。第二，在低温下（170倍），曙红癸基酯（EOSDEC）LB膜上用大的Au-SHIN所获得的等离子体增强荧光的增强因子（110倍）显着增加。等离子体激元消光和荧光发射的紧密匹配为高增强因子提供了支持。

更新日期：2015-12-01

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