Patterning of a Colloidal Crystal Film on a Modified Hydrophilic and Hydrophobic Surface This work was supported in part by the Japan Society for the Promotion of Science and the Kanagawa Prefecture Joint-Research Project from the Regional Intensive, Japan Science and Technology Corporation.

The unique photochemical properties of TiO2 provides a stepwise approach for the easy and precise patterning of colloidal crystal films. In this approach patterns of hydrophobic and hydrophilic areas are formed on a TiO2 surface and then a colored film of monodispersed polystyrene spheres is deposited on to the hydrophilic region (fish-shaped pattern in the example shown).