Composite Nanofiber (IMAGE) University of Pennsylvania School of Medicine Caption This shows the dynamic transition in a fibrous biomaterial composed of tunable fractions of structural (red) and water-soluble, sacrificial (green) electrospun polymeric nanofibers. The image was captured as fluid entered from right to left, dissolving sacrificial fibers and creating a more open fibrous network. Credit Brendon M. Baker, Ph.D.; Perelman School of Medicine, University of Pennsylvania 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.