Light Reflection Control in Biogenic Micro-Mirror by Diamagnetic Orientation
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- Masakazu Iwasaka
- Chiba University, 1-33 Yayoicho, Inage-ku, Chiba, 263-8522, Japan
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- Yuri Mizukawa
- Chiba University, 1-33 Yayoicho, Inage-ku, Chiba, 263-8522, Japan
書誌事項
- 公開日
- 2013-03-18
- DOI
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- 10.1021/la400046a
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
As has become known, most materials, such as proteins and DNA, show orientation under strong magnetic fields. However, the critical threshold for the magnetic field of the magnetomechanical phenomena is still unknown. We demonstrate that a thin micro-mirror from a fish scale with high reflectivity exhibits a distinct magnetic response at 100 mT. A dramatic event under a magnetic field is the decrease of light scattering from guanine crystals as well as rapid rotation against the applied magnetic field. Enhancement of light scattering intensity is also observed when the three vectors of light incidence, magnetic field, and observation are orthogonally directed. The results indicate that biogenic guanine crystals have a large diamagnetic anisotropy along the surface parallel and normal directions. The micrometer to submicrometer scale of thin biogenic plates can act as a noninvasively, magnetically controlled micro-mirror for light irradiation control in the micrometer-scale region.
収録刊行物
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- Langmuir
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Langmuir 29 (13), 4328-4334, 2013-03-18
American Chemical Society (ACS)
