We report a swell-defined, organic, hexagonal nanopillar array on a gold surface. The array was prepared from a cyanuric acid-melamine complex by means of sequential mixing on the gold surface. These nanopillars had uniform diameters of 200-400 nm and were 1 mu m in length. They were well faceted with hexagonal cross sections. The nanopillars had a crystalline structure, and the pillars exhibited at layered texture in the longitudinal direction.