臺灣博碩士論文加值系統

近來，對於曲面製作導電圖樣的3D電子元件有所需要，能夠具有高解析度且保持原始圖樣的形狀，因此，需要尋找新的技術取代傳統2D塗佈技術。本論文提供一個簡單且迅速的水轉印方法，在曲面上塗佈導電平整薄膜。為了在水面上形成緻密堆疊的銀薄膜，需要可以控制其品質和尺寸的奈米銀片，我們使用快速微波合成並採用多元醇的方法，製備具有高結晶性的奈米銀片尺寸約為700nm且厚度僅為35nm。奈米銀片可以懸浮於乙醇溶劑中，透過Langmuir-Blodgett方法將其散佈於水面上，製作出平整的自組裝奈米銀片薄膜。藉由乙醇與水的巨大表面張力差驅動奈米銀片在水面的散佈。然而，在乙醇蒸發時容易發生奈米銀片間嚴重的堆疊及聚集，而為了避免這個問題，加入陰離子界面活性劑(SDS)提升分散性，同時減少奈米銀片產生自行堆疊的情形，使得銀片薄膜更平整排列，轉印至基材後具有低電阻率。在最佳條件下，添加0.05wt%的SDS於奈米銀片乙醇溶液中就可達到10%純銀的導電度。使用模具容易地製作出導電圖案轉印後，發現奈米銀片薄膜能夠良好的黏附於曲面（凹面和凸面）基材。並且提出幾個例子以展示該方法應用於RFID或導電線路的潛力。本研究開發一種水轉印方法，以在曲面基材上製作平整的導電薄膜圖樣，並且該方法可以應用於更多其他電子元件中。

Recent needs of electronic devices on 3D objects require conformal conductive patterns over curvilinear surfaces with great shape fidelity. Thus, new technology beyond conventional 2D printing methods is needed. In this study, we develop a simple and fast water transfer method to fabricate conductive thin film patterns on curvilinear surfaces. To create closely packed thin films over water surface, conductive nanoplates with controlled quality and sizes are needed. To quickly produce such nanomaterials, crystalline silver nanoplates with a dimension of 700 nm and a thickness of 35 nm are first synthesized via a polyol method with a microwave synthetic route to accelerate the process. The silver nanoplates suspend well in ethanol. Then, the silver nanoplates are spread over water surface via Langmuir-Blodgett approach to create a smooth self-assemble silver nanoplate thin film. The spreading ability is driven by the large surface tension difference between ethanol and water. However, serious aggregation of nanoplates occurs after the evaporation of ethanol. To avoid this issue, an anionic surfactant (SDS) is added in the silver nanoplate solution to improve the dispersibility while reducing the aggregation of the silver nanoplates. The spread silver films can be easily transferred to any 3D objects with a high conductivity as low as 10% of bulk silver under optimum condition with 0.05 wt% SDS surfactant. With a plastic mask, conductive patterns can be created easily and transferred on curvilinear substrates. These silver nanoplate thin film patterns is able to adhere well on the curvilinear (concave and convex) substrates. Several examples are also demonstrated to show the capability of this approach for RFID or circuit track applications. In summary, a water transfer method is developed to fabricate smooth thin film patterns on curvilinear substrates, and this approach can be further applied to many other electronic applications.

口試委員審定書 i
致謝 ii
中文摘要 iii
ABSTRACT iv
目錄 v
圖目錄 i
表目錄 iii
第一章 緒論 1
1.1前言 1
1.2文獻回顧 2
1.2.1濕式薄膜技術 2
1.2.1.1 浸漬塗佈原理 3
1.2.1.2 Langmuir-Blodgett原理 5
1.2.1.3 水轉印技術 8
1.2.2 導電材料 9
1.2.2.1導電材料之形狀 9
1.2.2.2 奈米銀片之合成 10
1.2.2.3 微波輔助加熱合成法 13
1.2.3 水轉印技術 15
1.2.3.1 水轉印之銀薄膜 15
1.2.3.2 薄膜平整及貼附度 18
1.2.3.3 曲面塗佈平整膜 19
1.3研究目的 22
1.4論文架構 22
第三章 實驗系統程序 23
3.1 實驗藥品與儀器介紹 23
3.1.1 實驗藥品 23
3.1.2 實驗儀器 24
3.2 實驗流程 25
3.2.1 奈米銀片合成 25
3.2.2微波消化反應器 26
3.2.3 奈米銀片溶液之製備及水轉印塗佈 28
3.2.4 拉力移動計 28
第四章 奈米銀片表面形貌及製備 31
4.1 奈米銀片表面性質分析 31
4.1.1 奈米銀片型態及結構 31
4.2微波合成參數對奈米銀片之影響 34
4.2.1 不同反應時間及升溫速率對奈米銀片之影響 34
4.2.2 不同反應溫度對奈米銀片之影響 35
4.2.3 不同保護劑(PVP)分子量對奈米銀片之影響 37
4.2.4 奈米銀片生長機制 39
第五章 平整性奈米銀片薄膜 41
5.1 浸漬塗佈方法對銀薄膜之影響 41
5.1.1 浸塗法之奈米銀片溶液 41
5.1.2 浸塗法對薄膜之影響 42
5.1.3 浸塗法薄膜對於乾燥缺陷之影響 43
5.2 水轉印塗佈方法對銀薄膜之影響 44
5.2.1 奈米銀片之擴散機制 44
5.2.2 奈米銀片於乙醇溶液中分散性 45
5.2.3 界面活性劑之濃度對於電阻率之影響 48
5.2.4 奈米銀片濃度對於薄膜之影響 50
5.2.5 水轉印方法之探討 51
5.2.6 奈米銀片薄膜於平面及曲面基材之平整及貼附性 53
5.3 導電圖樣 56
5.3.1平面及曲面基材之導電圖樣 56
5.3.2 RFID被動式電子標籤 57
第六章 結論與未來展望 59
參考資料 60

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