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- W4308668114 abstract "Reconfigurable metamaterials require constituent nanostructures to demonstrate switching of shapes with external stimuli. Yet, a longstanding challenge is in overcoming stiction caused by van der Waals forces in the deformed configuration, which impedes shape recovery. Here, we introduce stiff shape memory polymers. This designer material has a storage modulus of ∼5.2 GPa at room temperature and ∼90 MPa in the rubbery state at 150 °C, 1 order of magnitude higher than those in previous reports. Nanopillars with diameters of ∼400 nm and an aspect ratio as high as ∼10 were printed by two-photon lithography. Experimentally, we observe shape recovery as collapsed and touching structures overcome stiction to stand back up. We develop a theoretical model to explain the recoverability of these sub-micrometer structures. Reconfigurable structural color prints with a resolution of 21150 dots per inch and holograms are demonstrated, indicating potential applications of the stiff shape memory polymers in high-resolution reconfigurable nanophotonics." @default.
- W4308668114 created "2022-11-14" @default.
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- W4308668114 date "2022-11-10" @default.
- W4308668114 modified "2023-10-17" @default.
- W4308668114 title "Stiff Shape Memory Polymers for High-Resolution Reconfigurable Nanophotonics" @default.
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- W4308668114 doi "https://doi.org/10.1021/acs.nanolett.2c03007" @default.
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