Controlled Origami Folding of Hydrogel Bilayers with Sustained Reversibility for Robust Microcarriers

Soft origami structures: Planar bilayer microparticles consisting of active and passive layers show a structural transformation to microcapsules because of an anisotropic volume expansion (see picture). The soft hydrogel materials used for both layers facilitate the reversible transformation and complete closure of the compartment, which enables in situ encapsulation and triggered release of micro- to nanoscopic active ingredients. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.