When COVID-19 hit, they adjusted their research to a different need. They are combining nano technology and copper oxide, which is known to have anti-microbial and anti-viral properties. After essentially spraying a thin layer of copper on fabric, regular masks become as effective as N95 masks.

https://www.wthr.com/article/news/health/iupui-researchers-develop-reusable-mask/531-5fdb40f2-a5f9-42bf-bd79-16a291cd41a3