Abstract
Microstructures with densely assembled TiO2 nanoparticles were found to be obtained by femtosecond laser irradiation in liquid. Although laser direct fabrication is a powerful tool for fine fabrication, there is strong limitation of materials because adequate absorption is essential for laser interaction. The nanoparticles were effectively assembled around Ag microparticles, precipitated by femtosecond laser reduction, in diluted AgNO3 solution. The nanoparticle layer was as thick as several micrometer in spite of laser spot diameter of 2 m. Direct laser writing of assembled TiO2 nanoparticles were successfully performed.
