Chemical Signaling (IMAGE) American Chemical Society Caption Scientists report that chemical signaling between microcapsules can initiate the capsules' movement, a finding that could assist nanomachines in drug delivery as well as a host of other applications. Credit Courtesy of O. Berk Usta 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.