Janus particle illustration (IMAGE) Indiana University Caption Named for the two-faced Roman god, a Janus particle (right) is coated with two separate molecule types across their surface. Credit Illustration by Lucy Sanchez Usage Restrictions Credit source 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.