電驅動液滴向來是微熱流領域中一熱門的操控技術，於產業與學術界引起研究熱潮迄今未減，於此範疇中，文獻多為探討液滴受到電外場影響時，所展現之各種型態與行為變化，對於以液滴作為電荷傳輸載具時所產生電荷交換之現象並未多所著墨，因此，本文先比對液滴泳動頻率與外場電壓之關係，以兩者間的理論值與實驗值驗證基本推論後，歸納出諸多現象，包括液滴尺寸越大所負載之電荷累積量越多，以及電外場值越大液滴泳動頻率越快等，再行設計一訊號轉換暨擷取系統，成功地將液滴產生電荷交換時之電訊號解譯而出，其中亦包含產生多種液滴型態變化時的不同電訊號，並且比對訊號波形、電壓值與液滴泳動現象作一系列之初步探究，最後，於文末斟酌不同考量，提出兩種改良式之實驗架構，並且放眼未來，構想展望。

The study of electrically driven droplets has become an important aspect in microfluidics during the past decades. Yet a limited volume of research has been published regarding to the phenomenon when droplet, driven under the motion of electrophoresis, discharges with grounded electrode. On this account, this article firstly, based on our initial results, formulated one theoretical model to describe the relationship between droplets’ moving frequency and electric field. Thoroughly we comparing the experimental results with theoretical ones, can the deduction of droplet carrying large amount of charges during the motion of electrophoresis be ascertained with the conclusion that the larger the droplet is the more charges it can carry and the stronger the electric filed is the faster the droplet can move. After designing the circuit to capture the signal when discharge happens, this article successfully interpreted different kinds of signals in accords with various situations of droplet under varied DC-driven electric field. The article briefly comes up with two kinds of improvement of experimental set-up concerning different objectives in the last paragraph.

第一章 緒論 1
1-1 前言 1
1-2 研究動機與目的 3
1-3 研究方法 4
第二章 理論基礎與文獻回顧 5
2-1 基礎理論介紹 5
2-1-1 極化現象與介電性質 5
2-2 界面張力 6
2-3 電雙層理論 7
2-4 電泳效應 8
2-5 泰勒錐 8
2-6 球狀導體之帶電量 9
2-7 近期之文獻回顧 10
第三章 實驗架構設計與量測方法 18
3-1介電油槽實驗之架構設計 18
3-2頻率量測暨訊號擷取之架構 19
第四章 量測結果與分析討論 22
4-1 液滴泳動時之數種型態變化 22
4-2 模型公式之探討 26
4-3 分析液滴泳動頻率以驗證理論假設 28
4-4 去離子液滴之AC訊號擷取與分析 31
第五章 結論與未來展望 45
5-1 結論 45
5-2 未來展望 47
參考文獻 51

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