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논문 기본 정보

자료유형
학술대회자료
저자정보
Jung Hwal Shin (Pohang University of Science and Technology) Kanghyun Kim (Pohang University of Science and Technology) WooSeok Choi (Korea National University of Transportation) Geunbae Lim (Pohang University of Science and Technology)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 창립 70주년 기념 학술대회
발행연도
2015.11
수록면
3,792 - 3,795 (4page)

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Liquid pumping can occur along the outer surface of an electrode under a DC electric field. For biological applications, a better understanding of the ionic solution pumping mechanism is required. Here, we fabricated CNT wire electrodes (CWEs) and tungsten wire electrodes (TWEs) of various diameters to assess an ionic solution pumping. A DC electric field created by a bias of several volts pumped the ionic solution in the direction of the negatively biased electrode. The resulting electro-osmotic flow was attributed to the movement of an electric double layer near the electrode, and the flow rates along the CWEs were on the order of picoliters per minute. According to electric field analysis, the z-directional electric field around the meniscus of the small electrode was more concentrated than that of the larger electrode. Thus, the pumping effect increased as the electrode diameter decreased. Interestingly in CWEs, the initiating voltage for liquid pumping did not change with increasing diameter, up to 20 ㎛. We classified into three pumping zones, according to the initiating voltage and faradaic reaction. Liquid pumping using the CWEs could provide a new method for biological studies with adoptable flow rates and a larger ‘Recommended pumping zone’.

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UCI(KEPA) : I410-ECN-0101-2016-550-002171022