具平行微通道的无电场玻璃芯片微电渗泵  

Y-shaped electric -field free electro -osmotic pump with small sub -channels in parallel

作　　者：游炜臻[1] 林耿锐[1] 叶嘉明[1] 周勇亮[1] 

机构地区：[1]厦门大学化学化工学院化学系化学生物学福建省重点实验室,厦门361005

出　　处：《功能材料与器件学报》2010年第3期261-265,共5页Journal of Functional Materials and Devices

基　　金：国家自然科学基金面上项目20675066;国家基础科学人才培养基金J0630429项目资助

摘　　要：设计并制作了一种Y型无电场电渗泵芯片,以聚电解质静电自组装技术在侧臂通道分别修饰正、负电荷形成电渗泵,实现中间主通道无电场干扰。侧臂由多个平行亚通道构成,以增强电渗泵流速。使用中性离子示踪法、毛细管法分别测定电渗泵流速与压强,考察了电场、亚通道个数及深度对流速与压强的影响。结果表明,流速、压强随外加电场增大而增大,并呈线性关系;流速随侧臂亚通道个数增大而增大,压强随通道深度减小而增大。当电场强度为600V/cm时,含9个深10μm、宽度25μm亚通道的电渗泵流速与压强分别为672nL/min和442Pa。A novel Y - shaped electro - osmotic pump consisting of two arms which has small sub - channels in parallel was developed. Two arm -channels were modified with cationic and anio - nic polyelec- trolyte respectively, allowing a field - free flow to be generated in main - channel. Flow rate and pressure were measured by particle tracking and capillary method respectively, and the influence of electric field, numbers and depth of sub - channel on flow rate and pressure was investigated as well. Results showed that both of flow rate and pumping pressure increased linearly with electric field. As the number of sub - channels increases, the flow rate becomes higher by increasing the cross -sectional area at a constant electric field. Meanwhile, the pressure falls as depth of sub - channel increases. Flow rate and pumping pressure were 672nL/min and 442Pa respectively for the pump with 9 sub - channels （ 10μm deep.25μm wide） in parallel,when electric field was 600V/cm.

关 键 词：微流控芯片 电渗微泵 无电场 修饰 

分 类 号：O657.8[理学—分析化学]