近幾年來,由於微機電系統(Micro-electro-mechanical system, MEMS)技術的成熟,其可被廣泛地運用在不同的學問上,例如:光電、化學、生醫檢測、機械、航空等方面。微總體分析系統(Micro Total Analysis System)便是將生醫檢測上取樣、樣本傳輸、混合、分離,及偵測等功能,利用微機電技術將分析儀器縮小並整合到一信用卡大小之生醫晶片上。在檢體(Sample)與試劑(Reagent)的混合中,傳統上是利用外界的擾動而產生之紊流,幫助二者的混合,但在微管道中,其流場多屬層流,很難到達紊流的狀況而幫助不同液體間的混合。本研究利用微機電製程製作出一微混合器,利用微電動液壓幫浦驅動二種不同液體,在流場中產生一側向力,或是產生一微漩渦,來達到混合的效果。同時,建立完整的實驗方法與設備,來觀察微管道中二種液體混合的情形。

Due to the maturity of MEMS( Micro-Electro-Mechanical-System ) technology recently, it can be broadly used in many different applications, for example: optoelectronics, chemical, biochemical test, mechanical, aerospace…etc..
μTAS( Micro Total Analysis System) uses MEMS technology to minimize and integrate analytical equipments into a credit-card sized biochip which includes sampling, sample transport, reaction, separation and detection functions. In the mixing of sample and reagent, it used external disturbance to generate turbulent flow to enhance mixing. But the flow field in the microchannel belongs to laminar flow mostly, it’s hard to achieve the turbulent flow for mixing enhancement. This research fabricated a micro mixer driven by EHD pumps which generate a side force or a micro vortex to enhance mixing. Microscopic flow visualization experimental setup is also established to visualize the flow field in the micro mixer.

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