Development of a 2D multiple micro-droplets controller using slanted finger interdigital transducers
Date Issued
2008
Date
2008
Author(s)
Yeh, Chung-Liang
Abstract
Recently, digital microfluidic devices which transport fluid without using a closed channel have attracted increasing attentions in biological applications. This thesis proposes a high-precision digital microfluidic system based on the integration of surface acoustic wave (SAW) technology and a proportional integrated (PI) control algorithm. In this system, we fabricate slanted finger interdigital transducers (SFITs) on a Y128X LiNbO3 substrate to excite and detect SAWs. Then, we employ the PI controller to achieve an accurate manipulation of the microdroplets. Results exhibit high manipulation accuracy and the droplets can be sped up by modulating the control parameters of the PI controller appropriately. Results of this study show the feasibility of using SAW for handling more than one biological process on a single chip and may find possible biological applications.
Subjects
SFIT
PI control
SAW
Digital microfluidic devices
Type
thesis
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