on Ohtsuka Electronics DLS-8000. The AFM images were obtained with
a Nanocute (SII Nano Technology Inc). Angular-dependent reflectance
spectra were recorded on the spectrophotometer V650 (JASCO) equipped
with the absolute reflectance measurement unit ARSV732 (JASCO). The
spectrophotometer was calibrated before the sample measurement. By
covering the entrance of the integrating sphere with a black paper,
dark measurement was done. After that, the water in a cell was measured
as the baseline with the observing angle α = 180° (
= 10–40° (
was measured on a Rigaku NANOPIX with CuKα radiation.