The use of biomimetic approaches toward, the production of nonsolid yet functional architectures holds potential for the emergence of novel device concepts. Gels, in particular those obtained via self-assembly of pi-conjugated molecules, are dynamic materials possessing unique (opto)electronic properties. Their adaptive nature imparts unprecedented responsivity to various stimuli. Hitherto, a viable device platform to electrically probe in situ a sol-gel transition is still lacking. Here we describe the fabrication of a sub-micrometer electrodic cavity, which enables low-voltage electrical operation of pi-gels. Thanks to the in situ stiprarnolecular self-assembly of the pi-gelator occurring within: the cavity, we conceived a novel gel based memristor whose sol-gel transition is reversible and can be controlled via heating and de bias. This work opens perspectives toward the fabrication of a novel generation of nonsolid multiresponsive devices.