Breathable Wearable Smartsensors Deriving from Interface Self-Assembled Film for Tracking l-Cysteine

Area of Science:

• Materials Science
• Biomedical Engineering
• Analytical Chemistry

Background:

• Wearable sensors are crucial for continuous, noninvasive biomarker analysis in disease diagnosis and fitness.
• Current wearable sensor limitations include suboptimal material properties and aggregation, affecting performance and repeatability.
• Functionalization of the active sensing layer is key to overcoming these challenges.

Purpose of the Study:

• To introduce an innovative functionalization method for wearable electrochemical sensors.
• To address limitations in material properties and dispersion for improved sensor performance.
• To develop a flexible, breathable sensor for real-time biomarker tracking, specifically l-cysteine (l-Cys).

Main Methods:

• Utilized a proton-induced self-assembly technique at an organic-water (O/W) interface.
• Generated biomarker-responsive films for sensor functionalization.
• Employed an activation mechanism for Prussian blue nanoparticles using hydrogen peroxide for l-Cys detection.

Main Results:

• Developed a flexible and breathable sensor with real-time precision tracking of l-cysteine.
• Demonstrated a specific response of the catalytic core to l-Cys via hydrogen peroxide activation.
• Achieved improved sensor repeatability and performance through the novel functionalization approach.

Conclusions:

• The study refines the fabrication of film-based electrodes for wearable sensing applications.
• Highlights the potential of two-dimensional materials in creating functional-specific response films.
• Paves the way for constructing high-performance electrocatalytic analytical interfaces for precise biomarker tracking.