title: Zinc Oxide Nanorods Shielded with an Ultrathin Nickel Layer: Tailoring of Physical Properties.
abstract: We report on the development of Ni-shielded ZnO nanorod (NR) structures and the impact of the Ni layer on the ZnO NR properties. We developed nickel-capped zinc oxide nanorod (ZnO/Ni NR) structures by e-beam evaporation of Ni and the subsequent annealing of the ZnO/Ni core/shell nanostructures. The core/shell NRs annealed at 400 °C showed superior crystalline and emission properties. More interestingly, with the increase of annealing temperature, the crystallinity of the Ni shells over the ZnO NRs gradually changed from polycrystalline to single crystalline. The presence of the Ni layer as a polycrystalline shell completely hindered the light emission and transmission of the ZnO NR cores. Further, the band gap of ZnO NRs continuously decreased with the increase of annealing temperature.
authors.affiliation: Department of Nanobio-Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 500712, Republic of Korea.
authors.forename: Devika
authors.initials: D
authors.lastname: Mudusu
authors.affiliation: Department of Nanobio-Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 500712, Republic of Korea.|Department of Physics, School of Engineering and Technology, BML Munjal University, Sidhrawali, Gurgaon-122413, Haryana, India.
authors.forename: Koteeswara Reddy
authors.initials: KR
authors.lastname: Nandanapalli
authors.affiliation: Department of Physics and Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Sreekantha Reddy
authors.initials: SR
authors.lastname: Dugasani
authors.affiliation: Department of Physics and Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Sung Ha
authors.initials: SH
authors.lastname: Park
authors.affiliation: Department of Nanobio-Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 500712, Republic of Korea.|Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, CA 92093-0407, USA.
authors.forename: Charles W
authors.initials: CW
authors.lastname: Tu
mesh_terms: D049329:Nanostructures / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D055585:Physical Phenomena; D013696:Temperature; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D009532:Nickel; C028007:nickel monoxide; D015034:Zinc Oxide