4 April 2012 Structural colors from multi-layered films containing black thin layers
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We have demonstrated the simple preparation of structurally colored composite films by stacking alternating Os and PB layers. Os has a much higher refractive index than PB, which causes the strong reflection at the interface between these two materials. Strong reflection colors were observed because of the interference between the multi-layers. Active control of the reflection peaks was achieved by swelling the PB layers. From these results, we conclude that black thin layers enhance the reflection of structural colors.
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Hiroshi Yabu, Hiroshi Yabu, Takayuki Nakanishi, Takayuki Nakanishi, Yuji Hirai, Yuji Hirai, Masatsugu Shimomura, Masatsugu Shimomura, } "Structural colors from multi-layered films containing black thin layers", Proc. SPIE 8339, Bioinspiration, Biomimetics, and Bioreplication 2012, 83390E (4 April 2012); doi: 10.1117/12.915043; https://doi.org/10.1117/12.915043

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