We introduce an ultra-fine inkjet system as a powerful tool for nanotechnology research that allows the arrangement of dots with a minimum size of less than one micron. Diverse materials, such as conductive polymers, fine ceramics, metal particles etc., can be used as inks. Using an nano metal paste as an ink material, we achieved the direct printing of metallic wires of only a few micrometers in width without any pre-patterning treatment of the substrate. Direct forming of three-dimensional structures anywhere on a substrate has also been demonstrated, and is possible by taking advantage of the rapid drying of the small volume droplets printed. The process is simple and the entire setup can be carried out on a desktop, in an ambient environment, and at room temperature.
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