Polymers Powered by Water (3 of 6) (video) American Association for the Advancement of Science Share Print E-Mail Loading video... Caption Two m-thick PEE-PPy films are flipping and navigating over a 30°C moist substrate. The large one is 9 cm × 9 cm and the small one is 2 cm × 4 cm. Despite the size difference, these two films flip at a similar frequency. This video relates to a paper that appeared in Jan. 11, 2013, issue of Science, published by AAAS. The paper, by M. Ma at Massachusetts Institute of Technology in Cambridge, MA, and colleagues was titled, "Bio-Inspired Polymer Composite Actuator and Generator Driven by Water Gradients." Credit [Video courtesy of Dr. Mingming Ma] Usage Restrictions Please cite the owner of the video when publishing. This video may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. 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.