Fig. 4
From: A light-regulated host–guest-based nanochannel system inspired by channelrhodopsins protein

The ion selectivity of light-controlled mechanisms. a Analysis via current recording of the nanochannels before UV light irradiation. b Analysis via current recording of the nanochannels after UV light irradiation. c The reversibility of the different states of the P6A-based nanochannels by measuring the current after alternating irradiation with different light