Open Sesame for Microcapsules (IMAGE) Max-Planck-Gesellschaft Caption Microcapsules in a cell, (a) before, and (b) after being illuminated with a laser. The arrow indicates the laser beam's focus. The laser opens the capsules, which release their fluorescent content. Credit MPI of Colloids and Interfaces Usage Restrictions None License Licensed 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.