玻璃纳米孔中的阳离子相关电渗流
Cation dependent electroosmotic flow in glass nanopores
摘要：
我们提出了我们的研究结果的变化，玻璃纳米孔外的电渗流相对于第1组阳离子物种的选择。与标准电动理论相反，在负驱动电压下观察到所有盐的流动反转。当驱动电压为负时，向下移动第1组导致较弱的流动，这与玻璃表面上的ζ电位沿周期表向下的降低一致。没有趋势出现与正驱动电压，然而，对于Cs，流动被独特地发现是反向的。这些结果通过纳米孔内的流动和沿着纳米孔附近的外壁的流动之间的相互作用来解释。
英文摘要：
We present our findings on the changes to electroosmotic flow outside glass nanopores with respect to the choice of Group 1 cation species. In contrast with standard electrokinetic theory, flow reversal was observed for all salts under a negative driving voltage. Moving down Group 1 resulted in weaker flow when the driving voltage was negative, in line with the reduction in the zeta potential on the glass surface going down the periodic table. No trend emerged with a positive driving voltage, however for Cs, flow was uniquely found to be in reverse. These results are explained by the interplay between the flow inside the nanopore and flow along the outer walls in the vicinity of the nanopore.
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