Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014)
    Nanomaterials Monday Sessions
       Session NM-MoM

Paper NM-MoM8
Positioning of Catalyst-Free Vapor-Solid Growth of Highly Crystalline ZnO Nanowires by Inkjet-Printing.

Monday, December 8, 2014, 11:00 am, Room Hau

Session: Nano Fabrication
Presenter: PaulinaR. Martinez-Alanis, Universitat de Barcelona
Authors: P.R. Martinez-Alanis, Universitat de Barcelona
F. Güell, Universitat de Barcelona
S. Khachadorian, Technische Universität Berlin
A. Franke, Technische Universität Berlin
M.R. Wagner, Institut Catala de Nanotecnologia
A. Hoffmann, Technische Universität Berlin
G. Santana, Universidad Nacional Autónoma de México
J.R. Morante, Institut de Recerca en Energia de Catalunya
Correspondent: Click to Email
High-density arrays of uniform ZnO nanowires, with a high crystal quality have been synthesized by a catalyst-free vapor-transport method. First, a ZnO thin film on a Si substrate was used as the nucleation site. In a second approach we demonstrate spatially selective, mask-less ZnO nanowires growth using ZnO inkjet-printed patterned islands as the nucleation sites on a SiO2/Si substrate. Raman spectroscopy measurements were performed to characterize the ZnO nanowires, which reveals the high crystal quality of the grown nanowires and a tensile stress was observed in the inkjet-printed nanowires. Photoluminescence measurements demonstrate that only the ZnO nanowires were emitting and there is no contribution from the ZnO thin film or the ZnO inkjet-printed patterned islands. Two emission bands were observed at room-temperature, one strong and narrow peak in the ultraviolet region associated with the near band-edge transition, and a reduced broad band in the green-yellow visible region.