Abstract
Dissolvable and transient devices are important for environment-friendly disposal and information security. Similar to transient electronic devices, photonic devices use dissolvable metals such as magnesium and zinc to enable tunable plasmonic resonances. However, functional nanostructured substrates made of a common photoresist and a soft substrate are not dissolvable. In this study, we report the large-area, dissolvable polylactic-co-glycolic acid nanostructures formed by nanoimprint lithography and discuss the impact of the imprinting temperatures and ambient conditions on the formed nanostructures. The deposition of a thin layer of metal can yield a quasi-3D plasmonic device, and the choice of zinc metal can result in an all-dissolvable device in water over a few days. Consequently, the transmission spectra of these plasmonic devices could be tuned after placement in water. This strategy yields a truly transient nanophotonic device that can be degraded after performing its function for a specific period.
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