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Multi-Layered Bipolar Ionic Diode Working in Broad Range Ion Concentration
Version 1
: Received: 19 May 2023 / Approved: 24 May 2023 / Online: 25 May 2023 (08:07:26 CEST)
A peer-reviewed article of this Preprint also exists.
Kim, J.; Wang, C.; Park, J. Multi-Layered Bipolar Ionic Diode Working in Broad Range Ion Concentration. Micromachines 2023, 14, 1311. Kim, J.; Wang, C.; Park, J. Multi-Layered Bipolar Ionic Diode Working in Broad Range Ion Concentration. Micromachines 2023, 14, 1311.
Abstract
Ion current rectification (ICR) is the ratio of ion current by forward bias to by backward bias and is a critical indicator of diode performance. In previous studies, many attempts have been continued to improve the performance of this ICR, but there is the intrinsic problem for geometric changes that induce ionic rectification due to their fabrication problem. Additionally, the high ICR could be achieved in the narrow salt concentration range only. Here, we propose a multi-layered bipolar ionic diode based on an asymmetric nanochannel network membrane (NCNM), which is realized by soft lithography and self-assembly of homogenous-sized nanoparticles. Owing to the freely changeable geometry based on soft lithography, the ICR performance can be explored according to the variation of microchannel shape. Interestingly, very stable ICR performance can be achieved using the multi-layered 3D configuration for the bipolar diode in a broad range of salt concentrations (0.1mM ~ 100 mM). This demonstrates the promising potential of multi-layered NCNM for applications in highly concentrated electrolytes, such as biosensors, desalination, or energy harvesting.
Keywords
Ion current rectification; Multi-layer; Bipolar ionic diode; Nanochannel network membrane; Nanoparticle
Subject
Chemistry and Materials Science, Nanotechnology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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