Coloration and structure of Taiwanese bronze scarab (Anomala expansa)
The structure and optical properties of the elytra of Taiwanese bronze scarabs (Anomala expansa) were investigated. The elytron is composed by a scale-like texture on the surface and a repeated bi-layers underneath. The reflectivity spectrum shows iridescence that the peaks shifts from yellow to gre...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2015-12-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4939133 |
| _version_ | 1819148863553929216 |
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| author | Min-Nan Wu Chien-Yen Chen Wei Pan |
| author_facet | Min-Nan Wu Chien-Yen Chen Wei Pan |
| author_sort | Min-Nan Wu |
| collection | DOAJ |
| description | The structure and optical properties of the elytra of Taiwanese bronze scarabs (Anomala expansa) were investigated. The elytron is composed by a scale-like texture on the surface and a repeated bi-layers underneath. The reflectivity spectrum shows iridescence that the peaks shifts from yellow to green color regions as long as the incident angle (θ) increases. A shoulder peak at 600 nm (θ = 20o) is absent after gently scraping the surface, which indicates that the yellow color is contributed by the scale-like texture. The remaining peak at 550 nm (θ = 20o) in the spectrum resembles the simulated spectrum by assuming the refractive index of n = 1.54 and n = 1 for the adjacent bi-layered structure. This implies that the multi-layered structure contributes to the green coloration as well as the iridescent effect. |
| first_indexed | 2024-12-22T13:52:28Z |
| format | Article |
| id | doaj.art-d2fc8b602a9a4461be2ab1d2ee4bc071 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-22T13:52:28Z |
| publishDate | 2015-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-d2fc8b602a9a4461be2ab1d2ee4bc0712022-12-21T18:23:38ZengAIP Publishing LLCAIP Advances2158-32262015-12-01512127227127227-1110.1063/1.4939133057512ADVColoration and structure of Taiwanese bronze scarab (Anomala expansa)Min-Nan Wu0Chien-Yen Chen1Wei Pan2Department of Physics, National Chung Cheng University, Chia-Yi 621, TaiwanDepartment of Earth and Environmental Sciences, National Chung Cheng University, Chia-Yi 621, TaiwanDepartment of Physics, National Chung Cheng University, Chia-Yi 621, TaiwanThe structure and optical properties of the elytra of Taiwanese bronze scarabs (Anomala expansa) were investigated. The elytron is composed by a scale-like texture on the surface and a repeated bi-layers underneath. The reflectivity spectrum shows iridescence that the peaks shifts from yellow to green color regions as long as the incident angle (θ) increases. A shoulder peak at 600 nm (θ = 20o) is absent after gently scraping the surface, which indicates that the yellow color is contributed by the scale-like texture. The remaining peak at 550 nm (θ = 20o) in the spectrum resembles the simulated spectrum by assuming the refractive index of n = 1.54 and n = 1 for the adjacent bi-layered structure. This implies that the multi-layered structure contributes to the green coloration as well as the iridescent effect.http://dx.doi.org/10.1063/1.4939133 |
| spellingShingle | Min-Nan Wu Chien-Yen Chen Wei Pan Coloration and structure of Taiwanese bronze scarab (Anomala expansa) AIP Advances |
| title | Coloration and structure of Taiwanese bronze scarab (Anomala expansa) |
| title_full | Coloration and structure of Taiwanese bronze scarab (Anomala expansa) |
| title_fullStr | Coloration and structure of Taiwanese bronze scarab (Anomala expansa) |
| title_full_unstemmed | Coloration and structure of Taiwanese bronze scarab (Anomala expansa) |
| title_short | Coloration and structure of Taiwanese bronze scarab (Anomala expansa) |
| title_sort | coloration and structure of taiwanese bronze scarab anomala expansa |
| url | http://dx.doi.org/10.1063/1.4939133 |
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