Nanovesicles (IMAGE) University of Texas at Dallas Caption Using a fluorescence microscope, research scientist Dr. Xiuying Li observes the process of using an ultrashort laser pulse to activate ultra-photosensitive nanovesicles to release molecules. A fluorescence microscope uses fluorescence and phosphorescence instead of or in addition to scattering, reflection, attenuation or absorption to study the properties of organic and inorganic substances. Credit The University of Texas at Dallas 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.