Multistate proteinous biomemory device based on redox controllable hapten cross-linker

Area of Science:

• Bioelectronics
• Materials Science
• Electrochemistry

Background:

• Development of advanced memory devices is crucial for next-generation electronics.
• Biomemory devices offer potential for high density and low power consumption.
• Cytochrome c (Cyt-c) is an electro-active protein with potential for bioelectronic applications.

Purpose of the Study:

• To develop a highly resolute surface-confined biomemory switch using Cyt-c.
• To investigate the photosensitive cross-linking mechanism for memory effect.
• To evaluate the stability and repeatability of the developed biomemory device.

Main Methods:

• Co-polymerization of signal-enhanced electro-active protein (Cyt-c) on gold substrates.
• Utilizing MACys-Ru(bipyr)2-MACys as a photosensitive cross-linker for Cyt-c.
• Characterization using scanning electron microscopy (SEM) for surface topography.
• Investigation of memory functions (writing/erasing) via chronoamperometry (CA) and open-circuit potential amperometry (OCPA).

Main Results:

• Successful development of a photosensitive cross-linked Cyt-c biomemory device.
• Demonstration of a stable, surface-confined switch controlled by redox properties.
• SEM confirmed photosensitive cross-linking of Cyt-c on gold surfaces.
• Two-state memory functions (writing and erasing) were successfully demonstrated.
• The device exhibited stability and repeatability over 10^4 cycles.

Conclusions:

• The developed polymeric proteinous memory device exhibits robust memory characteristics.
• The photosensitive cross-linking approach enables controllable redox-based switching.
• The biomemory device shows significant potential for stable and repeatable data storage applications.