Hybrid Supported Lipid Bilayers for Bioinspired Bioelectronics with Enhanced Stability

Area of Science:

• Bioelectronics
• Materials Science
• Synthetic Biology

Background:

• Biosensors utilize cell membrane proteins for analyte detection.
• Supported lipid bilayers (SLBs) on conducting polymers (CPs) mimic cell membranes for electrochemical sensing.
• Traditional SLBs on CPs suffer from poor stability, limiting applications.

Purpose of the Study:

• To develop a more stable and tunable biomimetic membrane for bioelectronic sensors.
• To investigate hybrid supported lipid bilayers (HSLBs) composed of phospholipids and block copolymers on CPs.
• To assess the performance and stability of HSLBs compared to traditional SLBs.

Main Methods:

• Fabrication of hybrid supported lipid bilayers (HSLBs) by blending phospholipids with synthetic block copolymers on conducting polymer (CP) electrodes.
• Characterization of HSLB properties, including stability, electrical sealing, and lateral diffusivity.
• Assessment of transmembrane protein insertion and device performance after exposure to enzymes.

Main Results:

• HSLBs demonstrated enhanced bilayer resilience and superior stability compared to traditional SLBs, maintaining electrical sealing after enzymatic degradation.
• The composition of HSLBs could be tuned to precisely control membrane properties like lateral diffusivity.
• Block copolymer incorporation did not impede transmembrane protein insertion or electrical sealing on CP electrodes.

Conclusions:

• Hybrid supported lipid bilayers on conducting polymers offer a stable and tunable platform for bioelectronic sensors.
• This advancement addresses key limitations of traditional biomimetic membranes, enabling broader applications in healthcare and sensing.
• The developed HSLB-CP interface represents a significant step towards advanced bioinspired sensors integrating bioelectronics and synthetic biology.