# Face masks and nanotechnology: Keep the blue side up

> Research article (Nano Today, 2021) · cited 110× · AI/ML

**Wikidata**: [openalex:W3119600080](https://www.wikidata.org/wiki/openalex:W3119600080)  
**Source**: https://4ort.xyz/entity/face-masks-and-nanotechnology-keep-the-blue-side-up