Cheap triboelectic limestone putty nanogenerator to harvest energy from everyday motion to power small devices

https://phys.org/news/2023-12-limestone-putty-nanogenerator-harvest-energy.html

"only craft-level skill needed... limestone-based mounting putty (tacky. like double-sided adhesive tape) and metallized polyester sheet... extends operational frequency bandwidth up to 80Hz compared to existing <10 Hz TENGs. using triboelectric layers in vibration-based energy-harvester design... future investigation of marble, sandstone and lunar soil based putties... heart monitor implants, biochip transponders for farm animals or sensors that alert a driver when tire pressure is low"

Related: 

Power from Snow: A Groundbreaking Renewable Energy Breakthrough
https://bnnbreaking.com/tech/science-tech/power-from-snow-a-groundbreaking-renewable-energy-breakthrough/

Harvesting human motion energy: The promise of wearable triboelectric nanogenerators
https://techxplore.com/news/2024-03-harvesting-human-motion-energy-wearable.html