Interaction of a Phospholipid and a Coagulating Protein: Potential Candidate for Bioelectronic Applications

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Nanotechnology

Background:

• Understanding biomembrane component interactions is crucial for developing novel electronic materials.
• 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) is a key component of cell membranes.
• Protamine sulfate (PS) is a protein with potential applications in biomaterials.

Purpose of the Study:

• To investigate the interaction between DOPC and PS.
• To explore the potential of the resulting complex for electronic memory applications.
• To characterize the electrical properties and switching mechanisms of PS-DOPC films.

Main Methods:

• Langmuir-Blodgett (LB) technique for film formation.
• Surface pressure-area (π-A) isotherm analysis.
• Electrical characterization to study resistive switching behavior.

Main Results:

• Protamine sulfate (PS) strongly interacts with DOPC, altering the lipid layer's fluidity.
• PS-DOPC films exhibit resistive switching behavior suitable for Write Once Read Many (WORM) memory.
• Trap-controlled space charge-limited conduction (SCLC) mechanism identified for switching.
• DOPC presence lowers the threshold voltage (VTh) for switching, reducing power consumption.

Conclusions:

• The interaction between DOPC and PS yields a promising material for WORM memory devices.
• The observed resistive switching is attributed to SCLC, influenced by DOPC.
• The developed PS-DOPC films offer potential for low-power electronic applications.