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Keywords:

  • flexible electronics;
  • hydrogels;
  • liquid metal;
  • memory devices;
  • polyelectrolytes;
  • soft electronics
Thumbnail image of graphical abstract

A new class of memristors based entirely on soft and liquid-based matter is presented. The devices are formed by interfacing liquid metal electrodes with water-based gel doped with polyelectrolytes. They memorize the last state of bias polarization on the basis of the asymmetric conductance of the hydrogel-oxide-liquid metal stack. Such devices may find application in circuit-live tissue interfaces, soft robotics, and neuromorphic systems.