Illustration of Directed Assembly of Liquid Crystal Defects (image) University of Pennsylvania Share Print E-Mail Caption By changing the geometry at the bottom layer of a stack of liquid crystals, the researchers were able to get much finer control of the features in the top layer than has previously been possible. Credit Felice Macera, Daniel Beller, Apiradee Honglawan, Simon Čopar Usage Restrictions With credit. Share Print E-Mail 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.