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Selective Coloration of Melanin Nanospheres through Resonant Mie Scattering
Author(s) -
Cho Soojeong,
Shim Tae Soup,
Kim Ju Hyeon,
Kim DongHyun,
Kim ShinHyun
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201700256
Subject(s) - materials science , mie scattering , melanin , scattering , absorbance , light scattering , wavelength , structural coloration , optics , optoelectronics , nanotechnology , chemistry , physics , photonic crystal , biochemistry
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.