Figure 1 (IMAGE) Arizona State University Caption The Sayres group applies a sequence of laser pulses to measure the photodynamics of neutral titania (TiO2)n clusters through a technique called femtosecond pump-probe spectroscopy. Small changes in the arrangement of atoms cause changes to the electron (e-) and hole (h+) motions. Credit The Biodesign Institute at Arizona State University 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.