Biometamaterials: Black Ultrathin Gold Film Fabricated on Lotus Leaf

Yuusuke Ebihara, Ryoichi Ota, Takahiro Noriki, Masayuki Shimojo, Kotaro Kajikawa

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Abstract

We report on a black metamaterial of gold fabricated on a lotus leaf that was used as a template. In spite of the extremely thin gold coating (10-nm thick) on the lotus leaf, the surface shows reflectivity below 0.01 over the entire visible spectral range. Finite-difference time-domain (FDTD) calculations suggest that the low reflectivity stems from the secondary structures on the lotus leaf, where randomly oriented nanorods are distributed.

Original languageEnglish
Article number15992
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Nov 4

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