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

Choi, Eunpyo; Wang, Cong; Chang, Gyu Tae; Park, Jungyul · Nano Lett · 2016

basic_science · Level V

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Abstract

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.