title: Large scale synthesis and enhanced field emission properties from hybrid CuO/ZnO nanorod.
abstract: Upper-directionally grown nanorods were synthesized on a large scale by a simple method of direct heating of Cu foil in air. Hybrid CuO/ZnO nanorods were fabricated by ZnO thin film coating using magnetron sputtering. Field emission (FE) measurements of CuO and hybrid CuO/ZnO nanorod films show that they have turn-on field of 3.81 and 3.24 V/microm and a current density of 0.39 and 1.1 microA/cm2 under an applied field of about 6.6 V/microm, respectively. By comparing X-ray photoelectron spectroscopy analysis and the FE properties of two types of samples, we concluded that the narrowing of band gap due to the change of electron binding energy of hybrid CuO/ZnO nanorods effectively improved FE.
authors: The Research Institute for Natural Sciences and Department of Chemistry, Hanyang University, Haengdang-dong 17, Sungdong-ku, Seoul, 133-791, Korea.
authors: Jungwoo
authors: J
authors: Lee
authors: Eunkyung
authors: E
authors: Park
authors: Taehee
authors: T
authors: Park
authors: Jongtaek
authors: J
authors: Lee
authors: Myungmo
authors: M
authors: Sung
authors: Whikun
authors: W
authors: Yi