Dissolvable Flexible Biomemristor Based on a Collagen Electrolyte and Mg Electrodes for Transient Electronics

Physically Transient Electronic Devices (PiTEDs) are building blocks of biodissolvable diagnostics and therapeutics. We fabricate a PiTED integrated with data storage and brain-inspired computing capable of data collection and decision-making in case of an emergency. It is also compatible with the physiological environment of the human body and biologically soluble and degradable after performing the required task. A flexible and transparent biomemristor with Mg/collagen/ITO structure is fabricated using a facile solution-assisted process. The flexible collagen-based biomemristor shows vital characterizations for a reproducible memristor, including extensive data retention and endurance cycles. The fish collagen-based device benefits from its biodegradability due to using dissolvable Mg electrodes and collagen from the fish scale as a naturally abundant protein. The Mg electrodes dissolved with water via hydrolysis after dropping water on the device. The electrolyte thin film is also easily water-soluble. The biomemristor shows a conductance modulation behavior of a biological synapse, including potentiation and depression. We constructed a memristive neuromorphic network to realize pattern recognition with a 92.2% accuracy. This device has potential applications in storing and analyzing top-secret information in defense services and implantable dissolvable medical systems.