本論文利用325nm的He-Cd雷射做為激發光源，作用於奈米粒子摻雜於液晶材料中，觀測螢光光譜。隨著摻雜奈米粒子的重量百分比濃度增加，螢光強度有先增強後衰減的趨勢。螢光強度的增強為摻雜奈米粒子後，散射面積的增加，而後衰減的情形為奈米粒子產生聚集的現象。實驗中，我們亦改變液晶導軸與激發光偏振的相對方位，發現螢光峰值強度會隨著角度增加而減弱，因液晶長軸與短軸對偏振光的吸收程度不同，而產生螢光強度的差異。

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中文摘要
目錄
圖目錄
表目錄
第一章 導論............................................................................................1
1-1 前言.............................................................................................1
1-2 液晶的簡介.................................................................................2
1-2.1 液晶的由來......................................................................2
1-2.2 液晶的分類......................................................................3
1-3 液晶物理.....................................................................................7
1-3.1 分子排列的秩序參數......................................................7
1-3.2 液晶的光學特性..............................................................8
1-4 奈米材料.....................................................................................9
1-4.1 奈米簡介..........................................................................9
1-4.2 奈米材料的特性..............................................................9
第二章 理論介紹..................................................................................13
2-1 光致螢光(PL)基本原理...........................................................13
2-1.1 螢光材料簡介................................................................13
2-1.2 發光機制簡介................................................................13
2-1.3 螢光材料發光原理........................................................14
2-2 吸收光譜簡介...........................................................................16
第三章 實驗方法與步驟……………………………………………..17
3-1 樣品製備..................................................................................17
3-1.1 材料介紹........................................................................17
3-1.2 樣品製作過程................................................................18
3-2 實驗裝置...................................................................................20
3-2.1 光致螢光實驗架設圖....................................................20
第四章 實驗結果與分析......................................................................22
4-1 吸收光譜量測...........................................................................22
4-2 光致螢光測量...........................................................................23
4-2.1液晶樣品的光致螢光.....................................................23
4-2.2摻雜奈米粒子對液晶樣品的光致螢光關係.................24
a.摻雜奈米銀粒子對液晶光致螢光之關係.....................24
b.摻雜奈米金粒子對液晶光致螢光之關係.....................36
4-3 改變偏振光對液晶樣品的光致螢光關係...............................40
第五章 結論..........................................................................................47
參考文獻..................................................................................................49

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