Utana Umezaki (IMAGE) Rice University Caption The researchers used a fluorescent surfactant, i.e. glowing soap, to tag the nanomaterial samples and render their motion visible. Credit (Photo by Jeff Fitlow/Rice University) Usage Restrictions Must credit Jeff Fitlow/Rice University. 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.