Abstract
The control of ionic current (electrolyte) flow through zinc oxide (ZnO) nanotubes isinvestigated. We studied a structure operating like a field effect transistor with a tunableionic flow. The main investigation tool used was molecular dynamics simulation. Wecomplemented the molecular dynamics simulation with the site binding method in orderto study the effect of the double layer on the ionic current flowing through thenanotube. We achieved this by considering the electrolyte solution as a virtualsemiconductor wire. The double layer capacitance and surface charge of the innerwalls of the ZnO nanotube have been calculated. The results indicate that ZnOnanotubes can be tuned to operate as ion selectors. ZnO nanotubes exhibit enhancedfunctionality with characteristics similar to those of the nanopore membrane.
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