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Nano Lett. 2016 Apr 13;16(4):2189-97. doi: 10.1021/acs.nanolett.5b04246. Epub 2016 Mar 21.

High Current Ionic Diode Using Homogeneously Charged Asymmetric Nanochannel Network Membrane.

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Department of Mechanical Engineering, Sogang University , 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 121-742, Korea.


A high current ionic diode is achieved using an asymmetric nanochannel network membrane (NCNM) constructed by soft lithography and in situ self-assembly of nanoparticles with uniform surface charge. The asymmetric NCNM exhibits high rectified currents without losing a rectification ratio because of its ionic selectivity gradient and differentiated electrical conductance. Asymmetric ionic transport is analyzed with diode-like I-V curves and visualized via fluorescent dyes, which is closely correlated with ionic selectivity and ion distribution according to variation of NCNM geometries.


Ionic diode; high current; ion selectivity; nanoparticle; self-assembly

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