Single-crystalline BaTiO3 nanocubes were synthesized by hydrothermal method using water-soluble titanium complex and surfactants. The highly-ordered assemblies of BaTiO3 nanocubes were directly fabricated on the substrates with micro-patterns by the dip coating method with a low upstroke operation rate. The micro-patterns which had micro-trenches parallel to the upstroke operating direction affected the formation of nanocube assemblies and enabled to fabricate assemblies with average size of about 40 μm in length and width of 2 μm. The micro-patterned polyimide substrate affected the capillary force and enhanced the ordering degree and density of the nanocube packing. This method has an advantage to suppress generation of micro-cracks and to form micro-patterning the BaTiO3 nanocube assemblies.
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