The patterned moisture-wicking and quick-drying fabric for surface enhanced Raman scattering analysis

Area of Science:

• Materials Science
• Biomedical Engineering
• Analytical Chemistry

Background:

• Wearable sensors face challenges in sweat collection and signal strength.
• Existing substrates often cause discomfort and reduced sensitivity.
• Spider silk's water-collecting ability inspires new approaches.

Purpose of the Study:

• To develop a comfortable and sensitive wearable sensor for sweat analysis.
• To improve sweat transport and concentration for enhanced detection.
• To create a novel substrate inspired by natural water-collection mechanisms.

Main Methods:

• Developed a polyester-covered cotton fabric with enhanced moisture-wicking and thermal conductivity.
• Introduced wettability differences on the fabric surface using hydrophobic reagents.
• Applied a silver layer via evaporation to create the Surface-Enhanced Raman Spectroscopy (SERS) substrate.

Main Results:

• The SERS substrate efficiently transported sweat to the detection area, improving Raman signal strength.
• Achieved sensitive, in-situ, non-destructive monitoring of urea levels in sweat.
• Demonstrated excellent mechanical stability and comfortable wearability.

Conclusions:

• The novel SERS substrate offers a promising approach for wearable health monitoring.
• Wettability differences enhance sweat collection and sensor performance.
• Potential applications include environmental monitoring and early disease warning systems.