Abstract

An array of 10 µm sized microlenses was fabricated from the adhesion of a silicasol on a polysilane film patterned by UV-light irradiation. This was achieved by increase in wettability to the aqueous sol–gel solution induced by the UV-photodecomposition of polysilane. By simply soaking the UV-patterned polysilane film into the sol–gel solution, a convex xerogel layer adhered only to the UV-exposed polysilane, and then was cured to form a ‘glass’. The protuberant xerogel functioned as a condensing lens.