Capillary-Welded Silver Nanowire Networks Enabling Decoupled Multimodal Wearable Sensing and Transparent...

Area of Science:

• Materials Science
• Nanotechnology
• Wearable Electronics

Background:

• Transparent wearable electronics face challenges with nanowire adhesion and signal interference.
• Integrating multiple sensing and heating functions in one device is difficult.

Purpose of the Study:

• To develop a transparent, multimodal wearable electronic film with enhanced adhesion and decoupled signals.
• To create a robust platform for strain sensing, temperature detection, and electrothermal heating.

Main Methods:

• Fabrication of a transparent PET/Ag NW/PVA film using vapor-induced capillary welding and polymer encapsulation.
• Room-temperature processing to reinforce silver nanowire junctions without substrate damage.
• Utilizing PVA encapsulation to improve interfacial adhesion and network stability.

Main Results:

• Achieved high transparency (~85% at 550 nm) and low sheet resistance (22-35 Ω sq⁻¹).
• Demonstrated reliable strain sensing over 1600 bending cycles.
• Enabled accurate thermoresistive temperature detection (0-50 °C, R²=0.986) and uniform electrothermal heating (up to ~52 °C).
• Distinct temporal responses allowed effective signal decoupling for multimodal sensing.

Conclusions:

• The developed transparent film offers a stable and reliable platform for integrated wearable electronic functions.
• The fabrication strategy overcomes key limitations in transparent conductive films for advanced applications.
• This work enables robust multimodal sensing and actuation within a single, flexible device.