Metastable copper-phthalocyanine single-crystal nanowires and their use in fabricating high-performance field-effect transistors

This paper describes a simple, vapor-phase route for the synthesis of metastable α-phase copper-phthalocyanine (CuPc) single-crystal nanowires through control of the growth temperature. The influence of the growth temperature on the crystal structures, morphology, and size of the CuPc nanostructures is explored using X-ray diffraction (XRD), optical absorption, and transmission electron microscopy (TEM). α-CuPc nanowires are successfully incorporated as active semiconductors in field-effect transistors (FETs). Single nanowire devices exhibit carrier mobilities and current on/off ratios as high as 0.4cm² V^-1 s^-1 and >10⁴, respectively.