首页|Visual identification of silver ornament by the structural color based on Mie scattering of ZnO spheres
Visual identification of silver ornament by the structural color based on Mie scattering of ZnO spheres
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Structural colors originated from Mie scattering of dielectric spheres can be regulated by the coupling ef-fect between them and substrates.Here a rapid visual identification method of silver ornaments was pro-posed by the coupling effect of ZnO spheres with them.Both simulation and experimental results proved that,by coupling with different metal substrates,the Mie resonance scattering peaks of ZnO spheres with dimeter of 700 nm showed different degrees of redshift,which lead to different structural color appeared when ZnO spheres deposited on different metal surfaces with a similar appearance.A red structural color was displayed on the surface of the real silver ornament and a yellow-green structural color was shown on the surface of the cupronickel ornament.This method is quite simple and low-cost because it only needs to spray the dispersion of ZnO spheres on the ornament surface.Due to the mild chemical prop-erties of the ZnO,covering and erasing ZnO spheres on the surface of silver would not corrode the silver ornament.Finally,an atomizer method was used for portable and daily testing.This work opens new perspectives on the visual identification of silver.
Jie Ren、Hao Zong、Yaqun Han、Tianyi Liu、Shufen Zhang、Qiang Xu、Suli Wu
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State Key Laboratory of Fine Chemicals,Frontier Science Center for Smart Materials,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China
Instrumental Analysis Center of Dalian University of Technology,Dalian 116024,China
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