Metamaterial Robot Claw (IMAGE) Purdue University Caption When stimulated, this material changes shape so that the robotic claw can grip an object and hold onto it without needing an external energy source. Credit Purdue University/Programmable Structures Lab 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.