Ionic Transport through Few Nanometer High Graphene Nanochannels

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Ionic Transport through Few Nanometer High Graphene Nanochannels Kittipitch Yooprasertchuti, Massimo Spina and Slaven Garaj CA2DM, National University of Singapore In nanoscale regime, many physical phenomena tends to be different from their bulk counterpart. Our group has been examined ionic transport within nanoscale confinement by using graphene heterostructure with atomically smooth surfaces. The chip is mounted into nanofluidic electrical measurement to observe the conductance trends.

A finite element simulation, solving coupling electrokinetic physics has been done to analyze the phenomenological parameters such as surface charge density, functional group dissociation constant and enhanced ionic mobility under confinement. We were able to explain the plot by 2D simulation, and give some correction to commonly oversimplified model.

Please visit our poster! Nano/Biophysics Lab: Slaven Garaj Group, CA2DM, NUS Poster No. PO.147