Bio-inspired colorimetric film based on hygroscopic coloration of longhorn beetles (Tmesisternus isabellae)
| Autor: | Seung-Yop Lee, Han-bok Seo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Photons
Multidisciplinary Materials science Pigmentation Humidity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Evaporation (deposition) Article 0104 chemical sciences Iridescence Coleoptera Lattice constant Chemical engineering Wettability Animals Colorimetry Wetting 0210 nano-technology Water vapor Longhorn beetle Photonic crystal |
| Zdroj: | Scientific Reports SCIENTIFIC REPORTS(7) |
| ISSN: | 2045-2322 |
| Popis: | Structure-dependent colour is caused by the interaction of light with photonic crystal structures rather than pigments. The elytra of longhorn beetles Tmesisternus isabellae appear to be iridescent green in a dry state and turn to red when exposed to humidity. Based on the hygroscopic colouration of the longhorn beetle, we have developed centimeter-scale colorimetric opal films using a novel self-assembly method. The micro-channel assisted assembly technique adopts both natural evaporation and rotational forced drying, enhancing the surface binding of silica particles and the packing density by reducing the lattice constant and structural defects. The fabricated large-scale photonic film changes its structural colour from green to red when exposed to water vapour, similarly to the colorimetric feature of the longhorn beetle. The humidity-dependent colour change of the opal film is shown to be reversible and durable over five-hundred cycles of wetting and drying. |
| Databáze: | OpenAIRE |
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