Self-Powered Switchable Gas-Humidity Difunctional Flexible Chemosensors Based on Smart Adaptable Hydrogel.

Area of Science:

• Materials Science
• Wearable Electronics
• Sensor Technology

Background:

• Developing self-powered, flexible, multi-function sensors for wearable electronics is challenging.
• Identifying diverse signals from a single device without algorithmic aid remains a hurdle.

Purpose of the Study:

• To create a smart, adaptable hydrogel for a self-powered, flexible, and switchable difunctional chemosensor.
• To enable crosstalk-free detection of oxygen and humidity using a single sensing material.

Main Methods:

• Co-introduction of two ions with differing hydrophilicity into a hydrogel.
• Construction of an electrochemical metal-air battery structure.
• Utilizing hydrogel state switching (water-rich/deficient) to modulate oxygen and humidity sensing.

Main Results:

• Achieved a reversibly switchable difunctional chemosensor.
• Demonstrated high sensitivities for oxygen (4170.5% /%) and humidity (380.2% /% RH).
• Exhibited ultrawide detection ranges for both analytes.

Conclusions:

• The adaptable hydrogel enables independent oxygen and humidity detection via state switching.
• The sensor shows promise for real-time monitoring in safety, health management, and human-machine interaction.
• This technology advances self-powered, flexible sensing for diverse applications.