Studying Capillary Action in Coated Tubes (IMAGE) Georgia Institute of Technology Caption Georgia Tech senior research engineer Peter Kottke adjusts the optics on a study of how hydrogel coatings affect capillary action in a narrow glass tube. Credit Credit: Candler Hobbs, Georgia Tech 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.