To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Formation of a PVA hydrogel film induced by the swelling of a dry PAAm substrate (PVA concentration, 15 wt%; immersion time, 3 h). Hydrogel films and coatings by swelling-induced gelation David Moreau, Caroline Chauvet, François Etienne, François P. Rannou, and Laurent Corté PNAS. 2016. DOI: 10.1073/pnas.1609603113 Download Original Video Browse All Videos »