Flexible Nonvolatile Bioresistive Random Access Memory with an Adjustable Memory Mode Capable of Realizing Logic...

Area of Science:

• Materials Science
• Electronics Engineering
• Biotechnology

Background:

• Flexible electronics require novel materials for advanced functionalities.
• Biocompatible and environmentally friendly materials are increasingly sought for electronic devices.
• Resistive random-access memory (RRAM) offers high density and low power consumption.

Purpose of the Study:

• To fabricate a flexible bioresistive memory device using tussah hemolymph (TH) as the active layer.
• To investigate the resistive switching characteristics of the TH-based device under varying compliance currents.
• To evaluate the device's performance in terms of endurance, retention, flexibility, and potential applications in logic circuits.

Main Methods:

• Fabrication of a flexible memory device with an aluminum/tussah hemolymph/indium tin oxide/polyethylene terephthalate structure.
• Application of different compliance currents (Icc) to induce distinct resistance states.
• Testing of electrical characteristics including endurance, retention time, and bending stability.
• Demonstration of logic operations (AND, OR) using the memory device.

Main Results:

• The device exhibited bipolar resistive switching with specific compliance currents (1 mA positive, 100 mA negative).
• Write-once-read-many-times (WORM) characteristics were observed with 1 mA compliance current in both voltage ranges.
• The memory device demonstrated excellent endurance (>10^4 s retention) and mechanical stability (constant characteristics after 10^4 bending cycles).
• The device successfully performed "AND" and "OR" logic operations.

Conclusions:

• A flexible, transparent biomemristor was successfully fabricated using natural tussah hemolymph.
• The TH-based device shows tunable resistive switching behavior, enabling diverse memory applications.
• This work presents a promising, eco-friendly approach for developing biocompatible flexible memory, nerve synapses, and wearable electronics.