Biometamaterials: Black Ultrathin Gold Film Fabricated on Lotus Leaf

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

doi:10.1038/srep15992

Biometamaterials: Black Ultrathin Gold Film Fabricated on Lotus Leaf

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

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

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 language	English
Article number	15992
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep15992
Publication status	Published - 2015 Nov 4

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title = "Biometamaterials: Black Ultrathin Gold Film Fabricated on Lotus Leaf",

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.",

author = "Yuusuke Ebihara and Ryoichi Ota and Takahiro Noriki and Masayuki Shimojo and Kotaro Kajikawa",

note = "Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (No. 25109707, 26600023, 26286058) from the Japan Society for the Promotion of Science.",

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AU - Ebihara, Yuusuke

AU - Ota, Ryoichi

AU - Noriki, Takahiro

AU - Shimojo, Masayuki

AU - Kajikawa, Kotaro

N1 - Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (No. 25109707, 26600023, 26286058) from the Japan Society for the Promotion of Science.

PY - 2015/11/4

Y1 - 2015/11/4

N2 - 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.

AB - 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.

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Biometamaterials: Black Ultrathin Gold Film Fabricated on Lotus Leaf

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