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Single-crystal Copper–Phthalocyanine Nanorods Self-assembled by a Solvent Evaporation Method

Copper phthalocyanine (CuPc) nanorods were prepared on a Si substrate by a solvent evaporation method. The results of XRD indicate that the CuPc nanorods were beta-phase single crystals and grown along the [010] direction. The diameters of CuPc nanorods depend on the solution concentration, and the formation of CuPc nanorods is insensitive to the solvents and substrates. This implies that the growth of CuPc nanorods is dominated by the intrinsic pi-pi stacking between Pc rings. In addition, a p-n junction was formed between CuPc nanorod and Si substrate.