Flow Rate Changes in the Heterogeneous Rectangular Microchannels with Different Hydrophilicity for the PDMS Bottom Surface 


Vol. 13,  No. 3, pp. 195-200, Sep.  2007


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  Abstract

This study investigated the flow rate changes of the heterogeneous rectangular microchannels which have different hydrophilic property on the bottom surface. The heterogeneous rectangular microchannel has three native PDMS (poly-dimethyl siloxane) surfaces which were patterned by the soft lithography. PDMS bottom surface was treated by the argon plasma and coated by the allyl alcohol (99%). The channel length was 10, 20 and 30 ㎜ and the channel width was 100, 200 and 300 ㎛, respectively. Several external voltages were applied to make the fluid flow by the electroosmosis in the microchannel. For the same electric field strength and hydrophilicity of the bottom surface, the flow rate is almost same. This result is matched to the theoretical expectation and confirms that the experimental system is reliable. With increasing the channel width, the flow rate increased for the same hydrophilicity of the bottom surface. The flow rate of the microchannel of higher hydrophilicity was larger than that of the microchannel of lower hydrophilicity. This result implies that the hydrophilicity change of the bottom surface could be applied to control the flow rate in the microchannel.

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  Cite this article

[IEEE Style]

N. SY, L. HS, K. KH, C. JH, Y. JK, Y. SK, R. YW, "Flow Rate Changes in the Heterogeneous Rectangular Microchannels with Different Hydrophilicity for the PDMS Bottom Surface," Clean Technology, vol. 13, no. 3, pp. 195-200, 2007. DOI: .

[ACM Style]

Noh SY, Lee HS, Kim KH, Choi JH, Yu JK, Yoon SK, and Rhee YW. 2007. Flow Rate Changes in the Heterogeneous Rectangular Microchannels with Different Hydrophilicity for the PDMS Bottom Surface. Clean Technology, 13, 3, (2007), 195-200. DOI: .

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

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