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Title: | 表面電漿子耦合對量子點與羅丹明6G間福斯特共振能量轉換的影響 Surface Plasmon Coupling Effects on the Förster Resonance Energy Transfer Process between Quantum Dot and Rhodamine 6G |
Authors: | Chien-Yu Chen 陳建瑜 |
Advisor: | 楊志忠(Chih-Chung Yang) |
Keyword: | 福斯特共振能量轉換,局域表面電漿子共振,量子點, FRET,LSPR,quantum dot,Rhodamine 6G, |
Publication Year : | 2020 |
Degree: | 碩士 |
Abstract: | 在本論文中,我們將羅丹明6G吸附至硒化鎘鋅/硫化鋅的核殼綠光量子點上,並將此羅丹明6G、綠光量子點的複合體利用靜電自組裝的方式使與銀奈米顆粒接合成一體,以研究侷域表面電漿子耦合效應對於量子點與羅丹明6G間福斯特共振能量轉換的影響。表面電漿子可以透過近場與發光體耦合以提高量子點的發光效率,因此能量透過福斯特共振能量轉換至羅丹明6G的過程必須與量子點的自發光競爭,我們觀測到在表面電漿子耦合效應下福斯特共振能量轉換的效率降低。另外雖然當羅丹明6G直接接合至銀奈米顆粒上時,表面電漿子耦合效應可以提升羅丹明6G的發光效率,但是當羅丹明6G先吸附在量子點上再接合至銀奈米顆粒上時,表面電漿子耦合提升發光效率的效果會降低,甚至當量子點吸附較多羅丹明6G分子時,表面電漿子耦合效應可降低羅丹明6G的發光效率。本研究中我們也建立一個速率方程式模型,嘗試與量測所得的光致發光衰減數據比對,並合理解釋我們所得到的實驗結果。 Rhodamine 6G (R6G) molecules linked CdZnSeS/ZnS green-emitting quantum dots (QDs) are self-assembled onto Ag nanoparticles (NPs) for studying the surface plasmon (SP) coupling effect on the Förster resonance energy transfer (FRET) process between QD and R6G. SP coupling can enhance the emission efficiency of QD such that FRET has to compete with QD emission for transferring energy into R6G. It is found that FRET efficiency is reduced under the SP coupling condition. Although R6G emission efficiency can also be enhanced through SP coupling when it is directly linked onto Ag NP, the enhancement decreases when R6G is linked onto QD and then the QD-R6G complexes are self-assembled onto Ag NP. In particular, R6G emission efficiency can be reduced through SP coupling when the number of R6G molecules linked onto a QD is high. A rate-equation model is built for resembling the measured photoluminescence decay profiles and providing detailed explanations for the observed FRET and SP coupling behaviors. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55350 |
DOI: | 10.6342/NTU202002092 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 光電工程學研究所 |
Files in This Item:
File | Size | Format | |
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U0001-3007202012085600.pdf Restricted Access | 3.9 MB | Adobe PDF |
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