Biomaterial microstructure (IMAGE) Northwestern University Caption A microscropy image of the new biomaterial. Nanofibers are pink; hyaluronic acid is shown in purple. Credit Samuel I. Stupp/Northwestern University Usage Restrictions add 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.