Our group has developed self-powered wearable triboelectric nanogenerators (TENGs) with polyvinyl alcohol (PVA)-based contact layers for monitoring cardiovascular health. TENGs help conserve mechanical energy and turn it into power. The work was reported by several media.
https://www.purdue.edu/newsroom/releases/2020/Q3/invention-offers-new-option-for-monitoring-heart-health.html
https://phys.org/news/2020-07-option-heart-health.html
https://www.cardiovascularbusiness.com/topics/acute-coronary-syndrome/self-powered-heart-monitors-polyvinyl-alcohol-cad
Nanogenerators Harvest Energy from Body, Monitor Heart Health
https://www.eurekalert.org/pub_releases/2020-07/pu-ion072120.php
https://www.devdiscourse.com/article/science-environment/1138955-invention-offers-new-option-for-monitoring-heart-health
https://newsbeezer.com/ireland/the-invention-offers-a-new-option-for-monitoring-heart-health/