Journal
ACTA MATERIALIA
Volume 159, Issue -, Pages 1-7Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2018.08.011
Keywords
Structural colors; Stainless steel; Surface plasmon resonance; Guided mode resonance; Color printing
Funding
- National Research Foundation of Korea - Korea government [NRF - 2015R1D1A1A09058787, 2015R1A2A1A15053000]
- RAMP
- D convergence program of National Research Council of Science AMP
- Technology of Republic of Korea [CAP-16-10-KIMS]
- National Research Council of Science & Technology (NST), Republic of Korea [CAP-16-10-KIMS] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015R1D1A1A09058787] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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As the esthetic functions of metals have attracted increasing attention, their coloration is a significant issue in scientific and technological aspects. We here demonstrate that vivid structural colors can be produced on stainless steel. The structure consists of a SU-8 layer coated on the surface of bulk stainless steel that has a one-dimensional texture of 500 nm period. Polarization-dependent, diverse colors are produced simply by changing the thickness of the dielectric overlayer. The colors result from the surface plasmon resonance and guided mode resonance of incident light, which occur on the metal surface and inside the dielectric layer, respectively. Simulation based on the finite-difference time-domain method supports the experimental results, showing that the layer thickness influences the characteristic wavelengths of both resonances and the resulting colors. Color image patterns are also printable on the surface of stainless steel by irradiating a solution-coated SU-8 layer with a pulsed ultraviolet laser beam. The final thickness of the photopolymeric SU-8 layer is locally controlled by adjusting laser fluence. The current study provides a simple route to produce diverse structural colors on metals and may find many applications including surface decoration, product identification, and anti-counterfeiting. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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