Liquid Phase Patterning and Morphology Control of Metal Oxides and Colloidal Crystals

摘要

Liquid Phase Patterning (LPP) of metal oxide thin films was developed to fabricate nano/mierostructures of metal oxide such as TiO2, Fe3O4, ZnO, Y2O3:Eu, etc.[1]. Several conceptual processes for LPP using self-assembled monolayers (SAMs) as templates were proposed, and nano/micropatterns of ceramic thin films were successfully fabricated. Molecular recognition of SAMs was effectively used to achieve high site-selectivity. These processes can be used for the fabrication of various metal oxide devices under environment-friendly conditions. We also developed a self-assembly process of particles to fabricate desired patterns of colloidal crystals[2]. A mieropattern of colloidal methanol prepared on a SAM in hexane was used as a mold for particle patterning, and slow dissolution of methanol into hexane caused shrinkage of molds to form micropatterns of close-packed particle assemblies. This result is a step toward the realization of narto/miero periodic structures for next-generation photonic devices by a self-assembly process.