Amstad, EstherDu, Huachuan2019-12-052019-12-052019-12-052019https://infoscience.epfl.ch/handle/20.500.14299/163695A polymeric structure comprising a plurality of spherical or polyhedral polymeric cells bound through their sidewalls via a connection element, wherein the polymeric cells and the connection element have a different Young's modulus.patentUS2020360569EP3679077WO2019048571GB20171428260050827