臺灣博碩士論文加值系統

本論文中探討不同尺寸的金奈米天線之螢光放光行為，試圖控制其螢光放光之頻率。因為金奈米天線的表面電漿共振模態可以塑造其螢光的放光頻率，而藉由調整金奈米天線的構型，可以改變其表面電漿共振之頻率，從而導致不同的螢光放光光譜。在本論文中，我們製作出不同尺寸及大小的金奈米天線，觀察不同尺寸之單一金奈米柱以及對稱金奈米天線的螢光放光性質，了解金奈米結構之螢光放光頻率與其表面電漿共振模態之間的關係。在對稱金奈米天線的螢光光譜中，我們看到其Fundamental mode、antibonding mode與higher-order mode在螢光光譜上的呈現，且會隨著金奈米天線尺寸的漸增而調整其螢光放光光譜的位置，此光譜趨勢與散射光譜與模擬光譜的趨勢相符合，但與呈現表面電漿共振頻率的散射光譜相比，卻有一明顯的藍位移，而此現象並不會發生在單一的金奈米柱上。本論文之研究可使我們對金奈米結構的發光性質有更深入的了解，並希望在未來能夠清楚其發光機制。

A gold plasmonic nanoantenna can provide additional local density of optical states (LDOS) for excited quantum emitters to radiative decay and thereby can shape the emission properties of the emitters. One example is the modulation of the antenna’s photoluminescence spectrum. Here, we fabricate gold nanoantennas with various size and study the modulation effect of gold nanoantennas systematically. All of the symmetry antennas show obvious modulation effects on the photoluminescence spectrum due to the transverse resonance, antibonding, higher-order and fundamental longitudinal localized surface plasmon resonance mode. The spectral features are in good agreement with that in the spectra obtained from dark-field scattering and numerical simulations. However, we have repeatedly observed extraordinary blue spectral shift for resonant modes between scattering and photoluminescence spectrum in symmetry antenna, but can’t observe in single nanorod. Our work shows that photoluminescence is strongly modulated by the LDOS of the nanoantennas and therefore can be used as a local luminescence source to report the LDOS.

中文摘要 i
英文摘要 iii
目錄 v
圖表目錄 viii

壹、電漿核殼奈米結構在染料敏化太陽能電池之穩定性測試 1
第一章 緒論 2
1.1 前言 2
1.2 染料敏化太陽能電池 (Dye-sensitized solar cell) 2
1.3 電漿奈米光天線 (Plasmonic nanoantennas) 4
1.4 電漿奈米結構增益染料敏化太陽能電池 5
1.5 研究動機 7
1.5.1 電漿奈米結構增益染料敏化太陽能電池之穩定性 7
1.5.2 電漿奈米結構增益染料敏化太陽能電池之形狀效應 7
第二章 實驗方法 9
2.1 奈米粒子合成 9
2.1.1 合成立方體、八面體和十二面體的金奈米粒子 9
2.1.2 合成Au@SiO2 11
2.2 UV-vis光譜量測 13
2.3 DSSC元件製作 14
第三章 結果與討論 17
3.1 電漿核殼奈米結構在電解液中之穩定性 17
3.2 元件效率 19
第四章 結論 23
第五章 參考文獻 24

貳、電漿奈米結構之螢光發光的調頻效應 27
第六章 緒論 28
6.1 前言 28
6.2 金屬奈米結構之表面電漿共振特性 29
6.3 金奈米結構之光激發光 31
第七章 實驗方法 35
7.1 Bottom-up方法與Top-down方法 35
7.1.1 奈米粒子合成 35
7.1.1 聚焦離子束(Focused Ion beam, FIB) 37
7.2 雷射掃描共軛焦顯微鏡(Laser Scanning Confocal microscopy) 38
7.3 全反射散射顯微鏡(Total internal reflection scattering microscope) 40
第八章 結果與討論 42
8.1 單一金奈米柱之光激發光性質 42
8.2 對稱金奈米天線之光激發光性質 46
8.3 藍移效應 51
第九章 結論與未來展望 53
第十章 參考文獻 54

後記、模擬電漿奈米結構增益量子柱之發光效應 56
第十一章 緒論 57
11.1 前言 57
11.2 光激發光 (Photoluminescence) 57
11.3 量子點 (Quantum dots)與量子柱 (Quantum rods) 58
11.4 電漿奈米粒子增益量子點之光激發光 60
11.5 增益公式推導 61
第十二章 實驗方法 65
12.1 時域有限差分法(Finite-Difference Time-Domain) 65
12.2 金屬奈米粒子合成 68
第十三章 結果與討論 71
第十四章 結論與未來展望 75
第十五章 參考文獻 76
附錄一 78
附錄二 79

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