McKnight T E, Culbertson C T, Jacobson S C, Ramsey J M
Oak Ridge National Laboratory, Tennessee 37831-6142, USA.
Anal Chem. 2001 Aug 15;73(16):4045-9. doi: 10.1021/ac010048a.
Electroosmotic manipulation of fluids was demonstrated using thin metal electrodes integrated within microfluidic channels at the substrate and cover plate interface. Devices were fabricated by photolithographically patterning electrodes on glass cover plates that were then bonded to polymeric substrates into which the channels were cast. Polymeric substrates were used to provide a permeable membrane for the transport and removal of gaseous electrolysis products generated at the electrodes. Electroosmotic flow between interdigitated electrodes was demonstrated and provided electric field-free pumping of fluids in sections of the channel outside of the electrode pairs. The resultant pumping velocities were shown to be dependent on the applied voltage, not on the applied field strength, and independent of the length of the electroosmotically pumped region.
利用集成在微流体通道底部与盖板界面处的薄金属电极，演示了流体的电渗操纵。通过光刻在玻璃盖板上制作电极图案，然后将其与聚合物基底键合，在聚合物基底中浇铸通道，从而制造出相关器件。聚合物基底用于提供一个可渗透的膜，以传输和去除电极处产生的气态电解产物。展示了叉指电极之间的电渗流，并在电极对外部的通道部分实现了流体的无电场泵送。结果表明，所产生的泵送速度取决于施加的电压，而不取决于施加的场强，并且与电渗泵送区域的长度无关。
