Solution-processed wrinkled electrodes enable the development of stretchable electrochemical biosensors

Area of Science:

• Materials Science
• Electrochemistry
• Biomedical Engineering

Background:

• Wearable biosensors require conductive materials that maintain performance under mechanical stress for real-time health monitoring.
• Existing stretchable electrodes face challenges in achieving high surface area and analytical sensitivity simultaneously.
• Developing robust, high-performance electrodes is crucial for advancing continuous disease management.

Purpose of the Study:

• To create stretchable electrochemical biosensors with enhanced surface area and high analytical sensitivity.
• To investigate the use of solution-processed wrinkled gold electrodes for biosensing applications.
• To evaluate the conductivity retention and strain tolerance of these novel electrodes.

Main Methods:

• Fabrication of stretchable electrodes using solution-processed wrinkled gold.
• Characterization of electrode surface morphology and surface area enhancement via wrinkling.
• Electrochemical detection of glucose using the developed biosensors.
• Assessment of electrode conductivity and performance under varying strain levels.

Main Results:

• Wrinkled gold electrodes significantly increased surface area, leading to high glucose detection sensitivity (750-810 μA M⁻¹ cm⁻²).
• The wrinkled electrode design allowed for substantial strain tolerance, withstanding up to 230% strain without significant conductivity loss.
• Demonstrated the feasibility of using wrinkled gold for stretchable electrochemical biosensors.

Conclusions:

• Solution-processed wrinkled gold electrodes offer a promising approach for developing highly sensitive and stretchable biosensors.
• This technology advances the development of wearable devices for continuous health monitoring and disease management.
• The combination of enhanced surface area and mechanical robustness addresses key challenges in wearable biosensor design.