Average enhancment factor of molecules-doped multi-layered nanoparticles on fluorescence
Date Issued
2010
Date
2010
Author(s)
Liu, Chuan-Li
Abstract
According to Maxwell equations, Mie theory and dyadic Green’s functions, analytical solutions of the incident plane wave and electric dipole source in the multi-layer structure are derived. In addition, we also define the excitation rate, quantum yield, enhancement factor and average enhancement factor.
The average enhancement factor (AEF) by considering the arbitrary orientation and location of molecule with respect to the polarization of the incident wave is proposed to explain the overall performance of a large number of nanoparticles. The concept of AEF can avoid overestimating or underestimating fluorescent intensity. Furthermore, with Stokes shift effect, we observe the difference of AEF between three kinds of nanoparticles:core-shell, nanoshell and nanoshell@SiO2.
To obtain the maximum AEF, the excitation spectra had better overlap the surface plasmon resonance(SPR) band. Finally, our results indicate that Ag nanoshell has the highest AEF. The AEF of optimal size of Ag nanoshell (radius of SiO2: 20 nm, thickness of Ag shell: 5nm) is 225.
The average enhancement factor (AEF) by considering the arbitrary orientation and location of molecule with respect to the polarization of the incident wave is proposed to explain the overall performance of a large number of nanoparticles. The concept of AEF can avoid overestimating or underestimating fluorescent intensity. Furthermore, with Stokes shift effect, we observe the difference of AEF between three kinds of nanoparticles:core-shell, nanoshell and nanoshell@SiO2.
To obtain the maximum AEF, the excitation spectra had better overlap the surface plasmon resonance(SPR) band. Finally, our results indicate that Ag nanoshell has the highest AEF. The AEF of optimal size of Ag nanoshell (radius of SiO2: 20 nm, thickness of Ag shell: 5nm) is 225.
Subjects
Mie theory
dyadic Green’s functions
excitation rate
quantum yield
enhancement factor
average enhancement factor
core-shell
nanoshell
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-99-R97543057-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):e9db397c32d35b8ec4e8c7518fbb308b