Comparison of Au and Ag nanoshells' metal-enhanced fluorescence

被引：12
作者：
Liaw, Jiunn-Woei [1 ,2 ]
Chen, Huang-Chih [3 ]
Kuo, Mao-Kuen [3 ]
机构：
[1] Chang Gung Univ, Dept Mech Engn, Taoyuan 333, Taiwan
[2] Chang Gung Univ, Ctr Biomed Engn, Taoyuan 333, Taiwan
[3] Natl Taiwan Univ, Inst Appl Mech, Taipei 106, Taiwan
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2014年 / 146卷
关键词：
Nanoshell; Metal-enhanced fluorescence; Average enhancement factor; Mie theory; Dyadic Green's functions; Stokes shift; PLASMONIC ENHANCEMENT; DISTANCE DEPENDENCE; SINGLE; EMISSION; MOLECULE; VICINITY;
D O I：
10.1016/j.jqsrt.2014.02.025
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The average enhancement factors of Au and Ag nanoshells (NSs) were analyzed theoretically to compare their overall performances on metal-enhanced fluorescence. We used the Mie theory and dyadic Green's functions to calculate the excitation rate and apparent quantum yield of NS interacting with a plane wave and a dipole, respectively, and then to obtain the enhancement factor. Moreover, the average enhancement factor (AEF) of NS on the fluorescence of a nearby molecule was obtained by averaging all possible orientations and locations of the molecule with a constant distance from NS. Our results show that the maximum AEF of Au NS occurs at the wavelength of the dipole mode, which is broadband. In contrast, the maximum AEF of Ag NS is at the narrowband quadrupole mode. In addition, the Stokes shift effect on AEF was studied for Au and Ag NSs. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：321 / 330
页数：10
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