Natural-Casein-Based Biomemristor with Pinched Current-Voltage Characteristics

Area of Science:

• Materials Science
• Electronics
• Biotechnology

Background:

• Biomemristors are promising for eco-friendly electronics.
• Typically, biomemristors lack the pinched I-V characteristic of Chua's memristor model.
• Achieving pinched I-V behavior in biomaterials is a significant challenge.

Purpose of the Study:

• To investigate the potential of natural casein for biomemristor fabrication.
• To achieve and characterize pinched current-voltage (I-V) behavior in a biomemristor.
• To evaluate the performance metrics of the developed biomemristor.

Main Methods:

• Fabrication of an Al/NaCas/ITO biomemristor device using water-soluble sodium caseinate (NaCas) derived from natural casein.
• Characterization of the current-voltage (I-V) response to identify memristive behavior.
• Evaluation of device performance, including resistance window, retention time, and cyclic endurance.

Main Results:

• The Al/NaCas/ITO biomemristor successfully exhibited pinched I-V characteristics.
• The device demonstrated a large resistance window (approximately 20 times).
• Improved performance was observed with a retention time of ~10^5 s and over 180 cycles of endurance.

Conclusions:

• Natural casein is a viable material for fabricating biomemristors with pinched I-V characteristics.
• The developed casein-based biomemristor offers enhanced performance compared to existing biomemristors.
• The findings pave the way for developing human-friendly and environmentally sustainable electronic systems.