fig2

Figure 2. Iontronic logic driven by ion-concentration gradients and mechanical stimuli. (A) The logic device via reverse electrodialysis. This figure is quoted with permission from the authors^[23]; (B) The logic control via integration of ion-concentration gradient and ion-selective nanofluidics. This figure is quoted with permission from the authors^[24]; (C) Mechano-driven neuromimetic logic gates could realize OR, AND, NOR, and NAND logic gates operating solely on mechanical stimuli. This figure is quoted with permission from Wiley-VCH GmbH^[25]. NOR: NOT OR gate; NAND: NOT AND gate; NP-MXene: nitrogen-phosphorus MXene; CEM: cation exchange membrane; AEM: anion exchange membrane.