Selective Coloration of Melanin Nanospheres through Resonant Mie Scattering |
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| Authors: | Soojeong Cho Tae Soup Shim Ju Hyeon Kim Dong‐Hyun Kim Shin‐Hyun Kim |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, South Korea;2. Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA;3. Department of Chemical Engineering, Ajou University, Suwon, South Korea;4. Department of Energy Systems Research, Ajou University, Suwon, South Korea;5. Robert H. Lurie Comprehensive Cancer Center, Chicago, IL, USA |
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| Abstract: | Black melanin inks are prepared to selectively exhibit colors under strong light, inspired by human hair. High absorbance of melanin suppresses multiple scattering, causing resonant Mie scattering predominant. Various colors can be developed as the resonant wavelength dictated by nanosphere diameter. Therefore, the melanin inks can be used to encrypt and selectively disclose multicolor patterns for anticounterfeiting applications. |
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| Keywords: | melanin Mie scattering nanospheres |
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