Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 12, 2022 - November 13, 2022
Recently, ionic current responses in mico- and nanofluidic channels have attracted significant attention from both fundamental and application perspectives in various research fields. For single particle analysis, ionic current responses are often caused by interactions between electrolyte ions and target particles as well as the volume exclusion effect due to the transport of target particles. Therefore, the behavior of ions in narrow confined spaces is required to measure more precisely to obtain detailed information of particles. In this study, we propose a novel method to identify ion species in electrolyte solutions, using the ion selectivity of nanochannels. Applying an external potential on an electrolyte solution for a probe, which is separated from a sample solution by a nanochannel, ion concentrations are separately determined. As a result, it is found that electroosmotic flows have an important role to distinguish ion species, breaking a symmetry of ion transport phenomena that are dominated by diffusion and electrophoretic transport.
