Electroosmotic flow in a poly(dimethylsiloxane) channel does not depend on percent curing agent
Electroosmotic flow in a poly(dimethylsiloxane) channel does not depend on percent curing agent
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聚（二甲基硅氧烷）通道中的电渗流不依赖于固化剂百分比
DOI：
10.1002/elps.200305784
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发表时间：
2004
期刊：
影响因子：
2.9
通讯作者：
R. Zare
中科院分区：
文献类型：
--
作者：
A. R. Wheeler;Gabriele Trapp;O. Trapp;R. Zare
以不同比例的“固化剂”(含硅氢化硅基团)和“碱”(含端乙烯基非交联型聚二甲基硅氧烷)为原料，制备了聚二甲基硅氧烷(PDMS)微流控器件，研究了不同比例对电渗流的影响。在为此目的制造器件时，开发了一种永久封闭PDMS沟道的新方法。作为对微流控方法的补充，在毛细管内壁涂覆了由不同固化剂与基质比例形成的PDMS。对于每种比例形成的PDMS，EOF是恒定的，这意味着表面负电荷不是由只存在于碱或固化剂中的化学物种引起的。
Poly(dimethylsiloxane) (PDMS) microfluidic devices were prepared from different ratios of “curing agent” (which contains silicon hydride groups) to “base” (which contains vinyl‐terminated noncross‐linked PDMS), to determine the effect of this ratio on electroosmotic flow (EOF). In fabricating devices for this purpose, a novel method for permanently enclosing PDMS channels was developed. As a supplement to the microfluidic method, the inner walls of capillaries were coated with PDMS formed from varying ratios of curing agent to base. EOF was found to be constant for PDMS formed with each ratio, which implies that the negative surface charges do not arise from chemical species present only in the base or the curing agent.