Figure 4.

Wavelength of stop band maximum for the inverse opals as a function of shell thickness. Curve 1: calculated from Equation 1; curve 2: calculated from Equation 1 but ignoring the shell filling effect; red square: measured from UV–vis spectra.

Liu et al. Nanoscale Research Letters 2012 7:457   doi:10.1186/1556-276X-7-457
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