Lignin nanoparticle films (IMAGE) Aalto University Caption Films made of lignin nanoparticles can have structural coloration or be used as transparent anti-fog coatings. Credit Alexander Henn / Aalto University Usage Restrictions May be used in publications related to this release with appropriate credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.