کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
851015 | 909296 | 2013 | 4 صفحه PDF | دانلود رایگان |
Au/SiO2 core–shell structure is used to enhance the fluorescence of MEH-PPV in the detection of nitrated aromatic explosives. The fluorescence intensity of MEH-PPV can be influenced by locally enhancing the excitation intensity, by increasing the emitter's radiate rate, and decreasing its fluorescence intensity by surface energy transfer (SET). Theoretical calculation results show that by modulate Au/SiO2 core–shell structure the optical properties of MEH-PPV could be tunable. With increasing the gold core radius and decreasing the shell thickness always leads the local field enhancement factor increases. However the optimal shell thickness is found to be a trade-off between radiate decay rate and surface energy transfer. From the analytic it can also be concluded that the silica shell with dielectric constant of 1.42 is a perfect choice.
Journal: Optik - International Journal for Light and Electron Optics - Volume 124, Issue 12, June 2013, Pages 1338–1341