Spirulina-Templated Metal Microcoils with Controlled Helical Structures for THz Electromagnetic Responses

被引：59

作者：

Kamata, Kaori ^{[1
,2
]}

Piao, Zhenzi ^{[1
]}

Suzuki, Soichiro ^{[3
]}

Fujimori, Takahiro ^{[3
]}

Tajiri, Wataru ^{[3
]}

Nagai, Keiji ^{[1
,3
]}

Iyoda, Tomokazu ^{[1
,2
,3
]}

Yamada, Atsushi ^{[2
,4
]}

Hayakawa, Toshiaki ^{[2
,5
]}

Ishiwara, Mitsuteru ^{[6
]}

Horaguchi, Satoshi ^{[6
]}

Belay, Amha ^{[7
]}

Tanaka, Takuo ^{[2
,8
]}

Takano, Keisuke ^{[9
]}

Hangyo, Masanori ^{[9
]}

机构：

[1] Japan Sci & Technol Agcy JST, Exploratory Res Adv Technol ERATO, Iyoda Supra Integrated Mat Project, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[2] Res Soc Biotemplate Technol, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[3] Tokyo Inst Technol, Chem Resources Lab, Div Integrated Mol Engn, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[4] Sumitomo Met Min Co Ltd, Div Mat, Technol & Engn Dept, Minato Ku, Tokyo 1058716, Japan

[5] Advantest Labs Ltd, Aoba Ku, Sendai, Miyagi 9893124, Japan

[6] DIC LIFETEC Co Ltd, Ichihara, Chiba 2908585, Japan

[7] Earthrise Nutr LLC, Calipatria, CA 92233 USA

[8] RIKEN, Adv Sci Inst, Metamat Lab, Wako, Saitama 3510198, Japan

[9] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

SURFACE;

D O I：

10.1038/srep04919

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Microstructures in nature are ultrafine and ordered in biological roles, which have attracted material scientists. Spirulina forms three-dimensional helical microstructure, one of remarkable features in nature beyond our current processing technology such as lithography in terms of mass-productivity and structural multiplicity. Spirulina varies its diameter, helical pitch, and/or length against growing environment. This unique helix is suggestive of a tiny electromagnetic coil, if composed of electro-conductive metal, which brought us main concept of this work. Here, we describe the biotemplating process onto Spirulina surface to fabricate metal microcoils. Structural parameters of the microcoil can be controlled by the cultivation conditions of Spirulina template and also purely one-handed microcoil can be fabricated. A microcoil dispersion sheet exhibited optically active response attributed to structural resonance in terahertz-wave region.

引用

页数：7

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