Performance Maximization of Bipolar Ionic Diodes through Geometry Optimization of Multi-Layered Microchannel and Its Appplications

초록

Nanofluid diodes are used for controlling ions with the unidirectional flow and have the potential for increasing sensitivity in sensors. Commonly, nanofluidic diodes are realized by a single-nanochannel form fabricated by a nano process like e-beam. Here, we propose a bipolar ionic diode using a 3D nanochannel network membrane (NCNM) formed by self-assembly of nanoparticles. The diode can control ions in high throughput manner and shows a high ion current rectification (ICR) phenomenon. By exploring the I-V characterization according to geometry change of multi-layered NCNM, finally, we can achieve the maximum ICR up to 1475.45, which is the best performance of our knowledge, and maximize a fluorescence-based sensor performance by concentrating mercury ion at the junction of positive charge region, so that 1nM of mercury can be detected © 2021 IEEE.

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