A Self-powered Neural Stimulator Based on Programmable Triboelectric Nanogenerators

Area of Science:

• Bioelectronic Medicine
• Neuroprosthetics
• Energy Harvesting

Background:

• Peripheral nerve modulation is crucial for advanced neuroprosthetics and bioelectronic medicine.
• Current implantable devices rely on batteries, facing limitations in long-term use due to energy constraints.
• Existing wireless and body energy conversion methods for implantable devices have efficiency and complexity issues.

Purpose of the Study:

• To propose a novel self-powered neural stimulation scheme using programmable triboelectric nanogenerators (TENGs).
• To demonstrate the feasibility of TENGs for powering implantable neuroprosthetic systems.
• To overcome the limitations of current battery-based systems.

Main Methods:

• Development of a programmable triboelectric nanogenerator device.
• Validation of the device's ability to generate high-voltage current pulses.
• In-vivo testing of sciatic nerve stimulation in rats.

Main Results:

• The TENG device successfully generated current pulses exceeding 100 V with minimal motion.
• Demonstrated effective sciatic nerve stimulation, validated by measurable rat leg kicking force.
• Showcased that shaking frequency directly correlates with the controlled kicking force.

Conclusions:

• Programmable TENGs offer a promising solution for self-powered neural stimulation.
• This technology has the potential to replace battery-dependent neuroprosthetic systems.
• Further optimization and miniaturization could lead to fully implantable, self-powered wireless neuroprosthetic devices.