Atomically stepped glass surface formed by nanoimprint

We investigated atomic-scale surface modifications of silicate glass by nanoimprint using an atomically stepped sapphire (alpha-A1(2)O(3) single crystal) plate as nanopattern mold. The sapphire mold had regularly arranged straight atomic steps, with uniform height and terrace width of about 0.2 and 80 nm, respectively. During pressing, vertical. positions of the sapphire mold and glass plate significantly affected the morphology of the imprinted glass surface. The nanopattern was transferred to the glass surface when the mold was set on the glass plate, while the nanowave pattern was formed on the glass surface when the glass plate was set on the mold.