Biocompatible Triboelectric Nanogenerators for Self-Powered Microelectronics: Design, Performance, and Real-Time...

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Triboelectric nanogenerators (TENGs) offer a promising avenue for harvesting ambient mechanical energy.
• Developing sustainable and cost-effective materials for TENG fabrication is crucial for widespread adoption.
• Chia seeds possess unique triboelectric properties suitable for energy harvesting applications.

Purpose of the Study:

• To demonstrate a novel, cost-effective chia seed-based triboelectric nanogenerator (C-TENG).
• To evaluate the performance and stability of the C-TENG for practical applications.
• To explore the potential of chia seeds as a sustainable material for biomechanical energy harvesting.

Main Methods:

• Fabrication of a simple-architecture C-TENG using chia seeds.
• Characterization of the C-TENG's electrical output (open-circuit voltage, short-circuit current, power density).
• Stability testing through cyclic operation and evaluation of capacitor charging capabilities.
• Density Functional Theory (DFT) analysis for understanding charge distribution and transfer mechanisms.

Main Results:

• The C-TENG achieved an open-circuit voltage of 501.8 V and a short-circuit current of 24.5 μA.
• Maximum power density reached 290 mW/m² at a load resistance of 5 MΩ.
• The device demonstrated stability over 3400 cycles and successfully charged capacitors.
• Real-time applications included illuminating LEDs, powering a calculator, and functioning as an electronic switch.

Conclusions:

• Chia seeds provide a sustainable, cost-effective, and versatile material for fabricating efficient triboelectric nanogenerators.
• The C-TENG demonstrates significant potential as a biomechanical energy harvester for self-powered microelectronic devices.
• Theoretical analysis supports experimental findings, elucidating charge transfer mechanisms in the chia seed-based system.