臺灣博碩士論文加值系統

在本論文中，我們以銀薄膜取代金薄膜，將銀奈米薄膜沉積在測磨光纖表面製作SPR光纖感測器，並做一系列的有系統的分析與討論，藉由不同的折射率的折射油來確定50nm的銀膜厚度具有最佳的靈敏度。基於銀在空氣中或溶液容易或硫化的現象，我們也進行了銀膜長時間暴露在空氣和水中的各種SPR光纖感測靈敏度帶來的衰減測量實驗，實驗結果顯示銀膜的SPR感測靈敏度比金膜的結果提高約50%的波長。銀膜老化的現象與金膜相比，在短時間內,銀膜的SPR感測其靈敏度就會出現明顯下降的現象，所以我們建議未來可以在銀膜上面濺鍍一層5~10nm的奈米金膜來改善此問題。

ABSTRACT

In this paper, we select silver to replace gold by depositing silver Nano thin film on ground fiber surface to produce SPR fiber optic sensor. Through a series of systematic analyses and discussions, and by using refractive oils of different reflective indexes, the SPR fiber optic sensor with 50 nm sliver thin film would be ascertained to be of the highest sensitivity.
Silver is easily vulcanized in the air or in the solution; therefore, we also performed the attenuation measurement experiments of different SPR fiber sensors by exposing them in the air or in the water for designed long durations. The results of the above experiments showed that the sensitivity of the SPR sensor with silver Nano thin film was increased about 50% comparing to the traditional SPR sensor with gold film. However, the aging phenomenon of silver film, comparing to gold film, decreased significantly the sensitivity of the SPR sensor in a short period of time. In the future, we suggest that a gold Nano thin film of 5-10 nm be sputtered on the silver film, which might be a possible solution to improve this problem.

目錄
第一章 緒論 1
1-1 前言 1
1-2 光纖感測器 2
1-3 研究動機與目的 4
1-4 表面電漿共振 6
第二章 原理 8
2-1 表面電漿共振 8
2-2 表面電漿波原理 10
2-3 漸逝波 15
2-4 測磨光纖 17
第三章 實驗架構 19
3-1製作光纖研磨載台 20
3-2測磨光纖 21
3-3金屬膜濺鍍沉積 23
3-4SPR量測 26
第四章 結果與討論 30
4-1 銀膜厚度 30
4-2 銀膜的衰減分析測試 38
4-3 金膜與銀膜的分析測試 49
4-4 濺鍍金膜與銀薄膜的表面親水性分析 54
第五章 未來展望 56
參考文獻 58

 
圖目錄
圖1-1 漸逝場形式結構3
圖1-2早期三菱鏡式SPR架構6
圖2-1電荷密度在金屬表面上發生集體式電偶極震盪電場分量圖9
圖2-2 電荷密度受到激發在金屬層及界電層之間發生震盪10
圖2-3光反射示意圖15
圖2-4 漸逝波原理16
圖2-5外界折射率跟光損失關係18
圖3-1 光纖研磨載台20
圖3-2 研磨機22
圖3-3從顯微鏡觀察光纖的寬度，初拋後寬度達到125µ22
圖3-4 經0.1µm鑽石細拋磨片拋光表面影像22
圖3-5 DC直流濺鍍機24
圖3-6金膜SPR光纖感測結構圖25
圖3-7銀膜SPR光纖感測結構圖25
圖3-8光譜分析儀(ANDO AQ-6315)27
圖3-9鹵素白光光源燈(ANDO 4303B)27
圖3-10 SPR系統量測示意圖28
圖3-11金膜SPR共振吸收下向響應曲線中心波長位置變化圖28
圖3-12銀膜SPR共振吸收下向響應曲線中心波長位置變化圖29
圖4-1 30分鐘銀膜濺鍍(35nm)31
圖4-2 40分鐘銀膜濺鍍(40nm)31
圖4-3 50分鐘銀膜濺鍍(50nm)32
圖4-4 銀膜厚度與濺鍍時間關係圖32
圖4-5 30nm銀膜厚度的SPR共振吸收白光頻譜響應圖33
圖4-6 30nm銀膜厚度SPR共振吸收下陷曲線中心位置波長變化圖33
圖4-7 40nm銀膜厚度的SPR共振吸收白光頻譜響應圖34
圖4-8 40nm銀膜厚度SPR共振吸收下陷曲線中心位置波長變化圖34
圖4-9 50nm銀膜厚度的SPR共振吸收白光頻譜響應圖35
圖4-10 50nm銀膜厚度SPR共振吸收下陷曲線中心位置波長位移變化圖35
圖4-11 60nm銀膜厚度的SPR共振吸收白光頻譜響應圖36
圖4-12 60nm銀膜厚度SPR共振吸收下陷曲線中心位置波長位移變化圖36
圖4-13 SPR共振吸收下陷曲線中心波長變化圖37
圖4-14 第一天銀膜的SPR共振吸收白光頻譜響應圖40
圖4-15 第一天SPR共振吸收下陷曲線中心波長與歸一光功率變化圖40
圖4-16 第二天銀膜的SPR共振吸收白光頻譜響應圖41
圖4-17 第二天SPR共振吸收下陷曲線中心波長與歸一光功率變化圖41
圖4-18 第三天銀膜的SPR共振吸收白光頻譜響應圖42
圖4-19 第三天SPR共振吸收下陷曲線中心波長與歸一光功率變化圖42
圖4-20 第四天銀膜的SPR共振吸收白光頻譜響應圖43
圖4-21 第四天SPR共振吸收下陷曲線中心波長與歸一光功率變化圖43
圖4-22 第五天銀膜的SPR共振吸收白光頻譜響應圖44
圖4-23 第五天SPR共振吸收下陷曲線中心波長與歸一光功率變化圖44
圖4-24 1.35折射率的折射油所測得的SPR共振吸收下陷曲線中心波長與歸一光功率變化比較圖45
圖4-25 50nm銀膜在折射率1.35所測得的歸一功率與天數變化圖...45
圖4-26 1.39折射率的折射油所測得的SPR共振吸收下陷曲線中心波長與歸一光功率變化比較圖46
圖4-27 50nm銀膜在折射率1.39所測得歸一光功率與天數變化圖46
圖4-28 4小時水的SPR共振吸收下陷曲線中心波長位移圖48
圖4-29銀膜浸泡於水中的歸一光功率變化圖48
圖4-30金膜的SPR共振吸收下陷曲線中心波長位移變化圖51
圖4-31 金膜的SPR共振吸收下陷曲線中心波長位移斜率圖51
圖4-32銀膜的SPR共振吸收下陷曲線中心波長變化圖52
圖4-33銀膜的SPR共振吸收下陷曲線中心波長位移斜率圖52
圖4-34銀膜水珠接觸角照片55
圖4-35 金膜水珠接觸角照片55
 
表目錄
表3-1 金與銀薄膜DC直流濺鍍參數23
表4-1置於空氣中SPR共振吸收下陷曲線中心波長37
表4-2 置於水中SPR共振吸收下陷曲線中心波長47
表4-3金膜與銀膜的SPR共振吸收中心波長位移斜率比較表53

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