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Structural color printing with a dielectric layer coated on a nanotextured metal substrate: simulation and experiment. | LitMetric

AI Article Synopsis

  • - The study introduces a method to create vibrant structural colors on stainless steel by texturing its surface and applying a dielectric layer, avoiding complex fabrication techniques.
  • - The variety of colors is achieved by changing the thickness of the dielectric layer, relying on surface plasmon resonance and guided-mode resonance of light.
  • - Experimental results confirm that a texture periodicity of 500 nm yields the best color tunability and clarity, with potential applications in decoration, product identification, anti-counterfeiting, and more.

Article Abstract

The printing of plasmonic structural colors relies on noble metal nanostructures fabricated on Si, glass, or plastic substrates. This paper presents a simple surface structure for producing vivid structural colors directly from common metal substrates. The structure is formed by texturing the surface of stainless steel (STS) imprinting and coating it with a dielectric layer. Diverse colors are generated simply by varying the thickness of the dielectric layer. The colors arise from surface plasmon resonance and guided-mode resonance of the incident light, which are excited on the textured STS surface and inside the dielectric layer, respectively. A finite-difference time-domain simulation shows that 500 nm is the optimum texture periodicity with regard to the tunability and vividness of the colors. This is experimentally verified by printing many differently colored images on the surface of STS substrates with a texture period of 500 nm. The proposed structure/method does not require a nanofabrication technique such as electron-beam lithography or focused ion beam etching. The results of the study provide a facile route for producing vivid structural colors on metals, which may find various applications, including surface decoration, product identification, anti-counterfeiting, and perfect absorbers.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417598PMC
http://dx.doi.org/10.1039/c9na00321eDOI Listing

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