title: Controllable synthesis of vertically aligned ZnO nanorod arrays in aqueous solution.
abstract: High-density well-aligned ZnO nanorod array was successfully synthesized on a large-area magnetron sputtering deposited Al doped ZnO film-coated Si (AZO/Si) substrate via a convenient solution method. X-ray diffraction and scanning electron microscopy show that the nanorods are well-oriented perpendicular to the substrate. The influences of the reaction temperature, time, on the size and shapes of the as-prepared ZnO nanorods (ZNs) samples have been studied. The length and diameter of the nanorods became bigger when a longer reaction time was used. When the temperature is elevated to 130 degrees C, a new conical ZNs was synthesized. Room-temperature photoluminescence (PL) spectra of all the ZnO products showed a strong ultraviolet (UV) emission. The photoluminescence from free excitons of the ZNs synthesized at higher temperature reflects the high purity and nearly defect free structure of nanorods. The well-aligned feature of the nanorod array is attributed to the nanorods' epitaxial growth from the AZO films.
authors.affiliation: Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Department of Physics and Center of Nanoscience and Nanotechnology Research, Wuhan University, P R China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Ma
authors.forename: Guojia
authors.initials: G
authors.lastname: Fang
authors.forename: Chun
authors.initials: C
authors.lastname: Li
authors.forename: Su
authors.initials: S
authors.lastname: Sheng
authors.forename: Linggang
authors.initials: L
authors.lastname: Fang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
authors.forename: Xing-Zhong
authors.initials: XZ
authors.lastname: Zhao
mesh_terms: D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012996:Solutions; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D012996:Solutions; D014867:Water; D015034:Zinc Oxide