  We demonstrate the effect of introducing controlled disorder in
self-assembled three-dimensional photonic crystals. Disorders are induced
through controlling the self-assembling process using an electrolyte of
specific concentrations. Structural characterization reveals increase in
disorder with increase in concentrations of the electrolyte. Reflectivity and
transmittance spectra are measured to probe the photonic stop gap at different
levels of disorder. With increase in disorder the stop gap is vanished and that
results in a fully random photonic nanostructure where the diffuse scattered
intensity reaches up to 100%. Our random photonic nanostructure is unique in
which all scatters have the same size and shape. We also observe the resonant
characteristics in the multiple scattering of light.
