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Iridescence Mimicking in Fabrics: A Ultraviolet/Visible Spectroscopy Study.

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Structural color from photonic crystals (PCs) on fabrics depends on textile properties. Polyamide fabrics show the most vibrant iridescent effects, while surface roughness influences color.

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IP-BRDFUV/Vis reflectanceiridescent effectphotonic crystalsstructural colorationtextiles

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Area of Science:

  • Materials Science
  • Optics
  • Textile Engineering

Background:

  • Photonic crystals (PCs) offer tunable optical properties for advanced applications.
  • Structural coloration in textiles is an emerging field for novel aesthetic and functional finishes.
  • Understanding substrate-fiber interactions is crucial for optimizing PC performance on fabrics.

Purpose of the Study:

  • To investigate the application of poly(styrene-methyl methacrylate-acrylic acid) photonic crystals on different fabric types.
  • To analyze the self-assembly, spectral characteristics, and color properties of PC-coated textiles.
  • To evaluate the influence of fabric substrate morphology and fiber type on structural color and iridescence.

Main Methods:

  • Coating polyamide, polyester, and cotton fabrics with five different sizes of PCs (170-250 nm).
  • Analysis using scanning electron microscopy (SEM) for surface morphology.
  • UV/Vis reflectance spectrophotometry (integrating sphere and scatterometry) for spectral and color analysis.

Main Results:

  • Fabric surface roughness significantly impacts the color produced by PCs.
  • Polyamide fabrics exhibited superior iridescence, producing more vivid and brilliant colors compared to polyester and cotton.
  • Increasing incident light angle caused a hypsochromic shift and new peak formations; scatterometry revealed hidden iridescence in polyester and cotton.

Conclusions:

  • Textile substrate morphology and fiber type critically affect structural color and iridescence in PC-coated fabrics.
  • Polyamide's smoother surface promotes better PC self-assembly and enhanced optical effects.
  • This research provides insights into designing advanced functional textiles with tunable structural colors.