Fig. 21 SEM surface images of (a) the SiO 2 opal film and (b) the CLCP inverse opal film and SEM
cross-sectional images of (c) the SiO 2 opal film and (d) the CLCP inverse opal film. The inset is the
locally amplified image. Thickness of the inverse opal film is about 17 mm. SEM images of the
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