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Metamaterials and Poisson’s ratio

In our movie we introduce metamaterials and their purpose. We are in particularly interested in metamaterials with a negative Poisson’s ratio. We first explain what the Poisson’s ratio is and what it means for an object to have a negative Poisson’s ratio. We therefore show videos in which we compress 3 objects, with positive Poisson’s ratio, zero Poisson’s ratio and a negative Poisson’s ratio respectively. Then we give a few examples of the use of a negative Poisson’s ratio in metamaterials. Used videos: -Wave propagation in negative index metamaterial - Valentin Vinoles    • Wave propagation in negative index metamat...   -How Does This Invisibility Cloak Work? - Seeker    • How Does This Invisibility Cloak Work?   -Self-guided shape-changes in metamaterials - Science Animated Coulais, C., Sabbadini, A., Vink, F. et al. Multi-step self-guided pathways for shape-changing metamaterials. Nature 561, 512–515 (2018) doi:10.1038/s41586-018-0541-0    • Self-guided shape-changes in metamaterials   -KinetiX—designing auxetic-inspired deformable material structures - MIT Media Lab    • kinetiX—designing auxetic-inspired deforma...   -These Metamaterials Go Beyond the Properties of Nature - Seeker    • These Metamaterials Go Beyond the Properti...   -Auxetic Polymer Membranes Through Electrospinning - EmpaChannel    • Auxetic Polymer Membranes Through Electros...   -Metamaterial Mechanisms (UIST'16) - HassoPlattnerInstitute HCI Authors: Alexandra Ion, Johannes Frohnhofen, Ludwig Wall, Robert Kovacs, Mirela Alistar, Jack Lindsay, Pedro Lopes, Hsiang-Ting Chen, and Patrick Baudisch    • Metamaterial Mechanisms (UIST'16)