Electrical switching property of single CuTCNQ nanowire

CuTCNQ nanowires were prepared by solution method.The morphology and structure were characterized via X-ray diffraction (XRD) and scanning electron microscopy (SEM).The results show that the as-obtained nanowires are phase I single-crystal,with lengths ranging from 1 to 8μm,and diameters ranging from 50 to 300nm.The electrical switching characteristics of single nanowire were studied.Current-voltage characteristics of CuTCNQ exhibited a clear reversible switching thresh-old from high resistance to low resistance state with on-off ratio of three orders of magnitude.The resistance of the nanowire increases with decreasing temperature.Negative resistance effect occurs when temperature is below 160K.