MicrospheresNanospheres/Monodisperse plain SiO₂ silica nanospheres and microspheres/1402

When uniformly sized nanospheres (200-450nm) are arranged in close packing fashion we able to see the diffraction of light

Scanning Electron Microscopy image of 1.5μm uniform plain SiO₂ microspheres

Scanning Electron Microscopy image of close packed 300 nm uniform plain SiO₂ nanospheres