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  • 學位論文

介電泳微粒子分選晶片之設計與製作

Design and Fabrication of Dielectrophoresis Micro-Particles Sorting Chip

指導教授 : 陳志堅

摘要


本研究目的擬設計製造一介電泳微粒子分選晶片。以介電泳(DEP)力,改變緩衝液中微粒子的移動軌跡,進而將目標粒子從混合微粒中偏移分選、集中或攔截。實驗中,設計出介電泳晶片中可分離目標粒子的傾斜形指叉電極、具有集中目標粒子的雙曲形電極及可攔截目標粒子的城垛形電極等形狀後,利用軟體CFD-RC模擬其電極邊緣電場強度與梯度分布。以微機電製程製作介電泳晶片電極,再分別以SU-8與PMMA製作流道公模並以PDMS翻製。在粒子實驗中,以交錯式的城垛形電極做為粒子測試晶片,輸入交流電壓20V,交流頻率以掃描的方式找出3μm粒徑的Latex微粒子於各種不同頻段之下所受到的DEP力變化情形。輸入交流電壓20V與交流頻率1M Hz時,粒子受到n-DEP力作用在不同的電極區搭配適當的臨界流速可具有良好的工作效率。透過粒子分別測試參數的方式,過濾出可將粒徑1μm與3μm Latex混合微粒的分離參數。期未來能將本研究的介電泳微粒子分選晶片應用於細胞、微生物的技術與檢測之用。

關鍵字

介電泳 DEP 微粒子 分選晶片

並列摘要


The purpose of the study is expected to design and fabrication a dielectrophoresis micro-particles sorting chip. We change the particle routes by dielectrophoresis (DEP) force to shifting, sorting, focus or taking in the mixed particles buffer. In the experiment, we design the tilting interdigitated electrodes to sort the target particle, the double curved electrodes to focus the target particle, and the catellated electrodes to take the target particle that using software CFD-RC to simulate the electric field strength and density of the electrodes edges. Using MEMS process we fabricate the electrodes of dielectrophoresis chip, and using SU-8 and PMMA we fabricate protruding channel model to reproduction by PDMS. In the particle experiment, the chip using the castellated electrodes arranged in staggered is inputted voltage AC 20V to find out the conditions of 3μm size Latex under different DEP force by AC frequency scanning techniques. The n-DEP force is effected on the particles in the different electrodes area fit crossover flow rate be Good working efficiency when we input the voltage AC 20V and AC frequency 1M Hz. Through using particles separate testing parameter, we can filter out the separate parameter of 1μm and 3μm Latex mixed particles. Hopefully dielectrophoresis micro particles sorting chip can be applied for technique which are used in the field of cell and microbiology for the examining and technology skills in the future.

並列關鍵字

dielectrophoresis DEP micro particles sorting chip

參考文獻


[1] Andersson, H. and van den Berg, A., 2003, “Microfluidic devices for cellomics: a review”, Sensors and Actuators B: Chemical, Vol. 92, pp. 315-325.
[2] Manz, A., Graber, N. and Widmer, H. M., 1990, “Miniaturized total analysis system: A novel concept for chemical sensing”, Sensors & Actuators, B: Chemical, Vol. 1, pp. 244-248.
[3] Pohl, H. A., 1951, “The motion and precipitation of suspensoids in divergent electric fields”, Journal of Applied Physics, Vol. 22, pp. 869-871.
[4] Pohl, H. A., 1958, “Some effects of nonuniform fields on dielectrics”, Journal of Applied Physics, Vol. 29, pp. 1182-1188.
[6] 王鎮之,2008,3D介電泳力分離生物粒子之結構設計與製作,大同大學機械工程學系碩士論文。

被引用紀錄


葉哲愷(2017)。球形粒子之介電泳交越頻率因次分析與預測〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU201700928

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