Microspace Triboelectric Nanogenerator Based on Biocompatible Lignin-Derived Activated Carbon for Advanced Active...

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Triboelectric nanogenerators (TENGs) are promising for self-powered devices like IoT sensors.
• Conventional TENGs suffer from environmental sensitivity due to exposed triboelectric layers.
• Advanced active sensors require enhanced sensitivity and environmental resilience.

Purpose of the Study:

• To develop a microspace TENG (MS-TENG) using lignin-derived activated carbon (LDAC) for improved active sensor applications.
• To investigate the enhanced sensitivity and reduced environmental exposure of the proposed MS-TENG.
• To demonstrate the potential of MS-TENG for detecting subtle body movements in virtual environments.

Main Methods:

• Fabrication of an MS-TENG utilizing biobased LDAC as a tribopositive electrode.
• Assembly of an MS-TENG array for real-time voltage acquisition.
• Performance evaluation of the MS-TENG for detecting motion data and assessing sensitivity under varying pressure.

Main Results:

• The MS-TENG demonstrated high sensitivity due to LDAC's properties (high surface area, porosity, functional groups, conductivity).
• The MS-TENG array successfully detected slight body movements, distinguishing finger and wrist motions for metaverse applications.
• The MS-TENG showed a 2-fold increase in sensitivity (∼12.1 V/N) compared to conventional TENGs (∼5.62 V/N) in a low-pressure regime (<4 N).

Conclusions:

• The proposed MS-TENG offers a strategy to mitigate environmental effects on TENG sensor performance.
• MS-TENGs exhibit superior sensitivity and reliability for advanced active sensing and soft wearable applications.
• This research highlights the potential of LDAC-based MS-TENGs for next-generation sensing technologies.