Acne Nanoparticle (IMAGE) University of California - Santa Barbara Caption The particles are delivered into the sebaceous gland by the ultrasound, and are heated by the laser. The heat deactivates the gland. Credit Peter Allen Illustration 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.