Fine Structure of Multi-particle Layered Organization for Organo-modified Zirconium Dioxides Fabricated by the Langmuir-Blodgett Technique

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Formation and structure of organo-modified zirconium dioxides of multi-particle layered organization were investigated by out-of plane and in-plane X-ray diffraction (XRD) and atomic force microscopy (AFM). The surface modification of zirconia particle was performed by several long-chain carboxylic acids with different lengths. Langmuir monolayers of these particles were extremely condensed on the water surface. Multi-particle layered organization was constructed by the Langmuir-Blodgett (LB) technique. From the results of out-of plane XRD measurement of the multilayers of oleic acid-modified ZrO2 particles, a sharp peak was clearly observed at 52 Å. AFM image at mesoscopic scales of this single particle layer show particle assembly at 50 nm diameters. However, fine particles at about 5 nm diameters are confirmed in the case of high-resolution AFM observation to the mono-particle films transferred at low surface pressure region. Therefore, it is found that regular periodic structure along the c-axis and a hierarchical aggregated particle form were fabricated by Langmuir and LB technique.
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