Jump to main content
Jump to site search

Issue 19, 2010
Previous Article Next Article

Tuning the lateral density of ZnO nanowire arrays and its application as physical templates for radial nanowire heterostructures

Author affiliations

Abstract

The lateral density of ZnO nanowire arrays grown with pulsed laser deposition (PLD) can be tuned from 1 to 10−2 μm−2 by introducing a ZnO nucleation layer and optimizing the distance between the substrate and the ablated target. High-density (∼10 μm−2) nanowire arrays can be grown on sapphire substrates with or without gold catalysts. However, if a ZnO wetting layer was adopted, the density of ZnO nanowires could be controlled with high reproducibility. The decreasing growth density is attributed to a competition between the two-dimensional film epitaxy and one-dimensional nanowire growth. The dependence of nanowire density on the substrate–target distance mainly arises from the expansion dynamics of the plasma plume and the chamber geometry. Using low-density nanowires as templates, a general PLD route was developed to grow radial nanowire heterostructures. Here we demonstrate MgZnO/ZnO/MgZnO nanowire quantum wells and ZnO/ZnO:P core–shell nanowire p–n junctions.

Graphical abstract: Tuning the lateral density of ZnO nanowire arrays and its application as physical templates for radial nanowire heterostructures

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Dec 2009, accepted on 24 Feb 2010 and first published on 26 Mar 2010


Article type: Paper
DOI: 10.1039/B926475B
Citation: J. Mater. Chem., 2010,20, 3848-3854
  •   Request permissions

    Tuning the lateral density of ZnO nanowire arrays and its application as physical templates for radial nanowire heterostructures

    B. Q. Cao, J. Zúñiga–Pérez, C. Czekalla, H. Hilmer, J. Lenzner, N. Boukos, A. Travlos, M. Lorenz and M. Grundmann, J. Mater. Chem., 2010, 20, 3848
    DOI: 10.1039/B926475B

Search articles by author

Spotlight

Advertisements