A bidirection-adjustable ionic current rectification system based on a biconical micro-channelElectronic supplementary information (ESI) available. See DOI: 10.1039/c5cc05852j

We developed a simple, cheap and bidirectional ionic current rectification system based on the integration of a biconical micro-channel, working electrode and reference electrode. This system may have potential and realistic future value for studying two-way ionic transport in the cell membrane. We developed a simple, cheap and bidirectional ionic current rectification system based on the integration of a biconical micro-channel, working electrode and reference electrode. This system may have potential and realistic future value for studying two-way ionic transport in the cell membrane.