金属增强荧光（MEF）：银岛膜的物理特性及样品几何形状探究
Metal-Enhanced Fluorescence (MEF): Physical Characterization of Siver-Island Films and Exploring Sample Geometries.
作者信息
Pribik R, Dragan A I, Zhang Y, Gaydos C, Geddes C D
机构信息
Institute of Fluorescence, University of Maryland Biotechnology Institute, 701 East Pratt Street, MD 21202, USA.
出版信息
Chem Phys Lett. 2009 Aug 1;478(1-3):70-74. doi: 10.1016/j.cplett.2009.07.033.
Abstract
In this study we have analyzed metal-enhanced fluorescence (MEF) effects from different density silver island films (SiFs) and the effects of sample geometry on the observed enhancement of fluorescence (EF). It is shown that silver islands grow exponentially with SiF deposition time (DT<7min), optical density of SiFs almost linearly depends on DT; electrical conductivity is zero. At DT>7 min, silver islands merge, exhibiting a sharp increase in electrical conductivity. It has been shown that the newly proposed SiF-Glass sample geometry exhibits higher EF values than the commonly used in MEF studies SiF-SiF sample geometry. The SiF-Glass geometry demonstrates high sensitivity for surface immunoassays, a growing application of metal-enhanced fluorescence.
摘要
在本研究中，我们分析了不同密度银岛膜（SiFs）的金属增强荧光（MEF）效应以及样品几何形状对观察到的荧光增强（EF）的影响。结果表明，银岛随SiF沉积时间呈指数增长（沉积时间DT<7分钟），SiFs的光密度几乎与DT呈线性关系；电导率为零。当DT>7分钟时，银岛合并，电导率急剧增加。研究表明，新提出的SiF-玻璃样品几何形状比MEF研究中常用的SiF-SiF样品几何形状具有更高的EF值。SiF-玻璃几何形状对表面免疫分析具有高灵敏度，金属增强荧光的应用正在不断增加。
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