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研究生:謝易庭
研究生(外文):Hsieh I-Ting
論文名稱:管道幾何形狀對於電動不穩定性效應的影響
論文名稱(外文):Geometric Effect of Microchannels on the Electrokinetic Instability Phenomena
指導教授:張文俊張文俊引用關係
指導教授(外文):Chang Wen-Chung
學位類別:博士
校院名稱:南台科技大學
系所名稱:電子工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:102
畢業學年度:101
語文別:中文
論文頁數:69
中文關鍵詞:電動不穩定電導率電場擾動
外文關鍵詞:Electrokinetic instability (EKI)Electrical conductivity,Electrical field perturbation
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微流體管路設計中常使用外加電壓造成電動不穩定(EKI)現象來驅動,而EKI現象的發生是當微流體在一個外加高電場梯度超過臨界電場下而發生。本文於T與十字型管道中分別設計突張與突縮的管道,以探討管道寬度對於電動不穩定效應的影響。研究目的在於尋找降低EKI的高電場臨界值方式,同時又能保持高混合效率的方式。
由實驗中發現,對於較窄的管道,其產生電動不穩定效應的臨界電場強度可較小;反之,對於較寬的管道,其產生電動不穩定效應的臨界電場強度則較大。因此,要讓電動不穩定現象較快產生的話,則可設計突縮微管道來達成;而要讓此現象延遲產生的話,可設計突張微管道以達成。另外實驗與模擬比較中,亦可發現相對圖形趨勢是一致的,兩者誤差來自於實驗中管壁的不均勻或是模擬中未考慮加入的參數影響。最終利用本論文的結果更可延伸研究非對稱式突縮與突張微管道的電動不穩定效應。
Usually, the use of EKI (Electro-kinetic Instability) by external voltage is applied in micochannel design. EKI phenomenon occurs under an operation condition while a higher electric field intensity which is greater than a threshold value is applied to a microfluidics within a micochannel. In this study, T-type and Cross-shaped microchannel with sudden expansions and sudden contractions were design in order to investigate the channel width effect on the EKI phenomenon. The purpose of this study is focused on the method of decreased electric threshold and high mixing efficiency.
From experiment, it is found that the critical value of the electric field intensity can be reduced for the microchannel with sudden contractions. On the contrary, for the microchannel with sudden expansions, the critical value should be greater. In addition, the relative trends of curve in experiment and simulation are coherent. The inaccuracy between experiment and simulation may be resulted from the non-uniform channel wall or non-consideration parameters. Based on this study, it could be expanded to research the EKI phenomenon while the asymmetrical sudden expansion and sudden contraction micro-channel are used.
目 次
摘 要 iv
ABSTRACT v
誌 謝 vi
目 次 vii
表目錄 ............................................................ ix
圖目錄 ............................................................. x
符號說明 xiii
第一章 緒論 1
1-1前言 1
1-2 微機電系統 1
1-3微流體晶片 1
第二章 研究動機與目的 3
第三章 基礎理論 6
3-1 電雙層 10
3-2 電滲流 10
3-3 電動不穩定 10
第四章 微流體晶片之製作 13
4-1 光罩製作 13
4-2 晶片基材 13
4-3 晶片製作過程 13
第五章 實驗方法 22
5-1 實驗設備與前置 22
5-2 實驗操作過程 26
5-3 模擬操作過程 26
第六章 微管道對於臨界電場強度的影響 29
6-1 不同寬度T型微管道 29
6-2 突張與突縮T字型微管道 34
6-3 突張與突縮十字型微管道 41
6-3-1 濃度比例1:10:1 41
6-3-2 濃度比例10:1:10 49
第七章 結論 55
參考文獻 57
自 述 ............................................................ 59
參考文獻

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