fig1
Figure 1. Typical examples of natural PCs with different periodicity: (A) natural 1D-PC formed on the wings of Morpho Menelaus butterfly[47]; (B) natural 2D-PC formed on the Mosquito C. pipiens moth[48]; (C) natural 3D-PC formed on the body on weevil L. augustus[49]; (D-F) diagram illustrating the construction of corresponding colloidal PCs as the building blocks are spheres. PCs: Photonic crystals; 2D: Two-dimensional; 3D: Three-dimensional.
