基于介质上电润湿效应的液态场效应管

摘要

用一片ITO玻璃作为场效应管的源极，在此玻璃上分别粘贴两块相同厚度塑料薄铝片作为栅极和漏极，在两块铝片之间留下很小的平行缝隙，再分别在源极、漏极、栅极的玻璃板上涂上聚四氟乙烯(Teflon)薄膜作为亲油疏水层，采用环氧树脂作为围堰材料，这样就制备了基于电润湿效应的新型液态场效应管。通过改变栅极的电压，能够调节有色油滴的位移，从而控制源极和漏极的电流变化。完成了液态场效应管的制作，并给出了初步的测试结果。%A piece of ITO glass is used as the source electrode of a field-effect transistor. Two pieces of plastic aluminum flake with same thickness are pasted on the glass as gate and drain electrodes. A small and par⁃allel gap between two pieces of aluminum pin is left. Teflon films are wiped on the glass of source, gate and drain electrodes as hydrophobic layers. Epoxide resin is used as cofferdam material so a new liquid field-effect transis⁃tor (LiquiFET) is produced based on electrowetting on dielectric (EWOD) effect. The displacement of colored oil drop is adjusted by changing the voltages of drain electrodes. And the current changes of source and gate elec⁃trodes are controlled. A liquid field-effect transistor is fabricated and its preliminary test results are given.