Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
A technology of colloidal photonic crystals and nanoparticles, applied in nanotechnology, colloid chemistry, colloid chemistry, etc., can solve problems such as difficult commercial applications
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Embodiment 1
[0055] In the colloidal nanoparticle solution, water was used as a dispersion medium, and polystyrene spherical particles with a diameter of 460 nm were used as nanoparticles.
[0056] Polystyrene particles with a diameter of 460 nm were dispersed in water at 0.5 weight percent, and then 0.21 weight percent of polyvinylpyrrolidone as a viscoelastic material was dissolved in the colloidal nanoparticle solution. After the substrate was placed in the solution, the dispersion medium was evaporated in an oven at 60° C., thereby producing a colloidal photonic crystal.
[0057] As shown in Figure 2, this was confirmed by scanning electron microscopy observations.
Embodiment 2
[0059] A photonic crystal was prepared by the same method as in Example 1 except that 0.63 weight percent of polyvinylpyrrolidone was used as the viscoelastic material. As shown in Figure 3, this was confirmed by scanning electron microscopy observations.
Embodiment 3
[0061] A photonic crystal was prepared by the same method as in Example 1, except that 0.63 weight percent of polyacrylic acid was used as the viscoelastic material.
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