Large-area zinc oxide nanorod arrays templated by nanoimprint lithography: control of morphologies and optical properties
Author(s)
Zhang, Chen; Huang, Xiaohu; Liu, Hongfei; Chua, Soo Jin; Ross, Caroline A
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Vertically aligned, highly ordered, large area arrays of nanostructures are important building blocks for multifunctional devices. Here, ZnO nanorod arrays are selectively synthesized on Si substrates by a solution method within patterns created by nanoimprint lithography. The growth modes of two dimensional nucleation-driven wedding cakes and screw dislocation-driven spirals are inferred to determine the top end morphologies of the nanorods. Sub-bandgap photoluminescence of the nanorods is greatly enhanced by the manipulation of the hydrogen donors via a post-growth thermal treatment. Lasing behavior is facilitated in the nanorods with faceted top ends formed from wedding cakes growth mode. This work demonstrates the control of morphologies of oxide nanostructures in a large scale and the optimization of the optical performance.
Date issued
2016-11Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Nanotechnology
Publisher
IOP Publishing
Citation
Zhang, Chen et al. “Large-Area Zinc Oxide Nanorod Arrays Templated by Nanoimprint Lithography: Control of Morphologies and Optical Properties.” Nanotechnology 27, 48 (November 2016): 485604. © 2016 IOP Publishing Ltd
Version: Final published version
ISSN
0957-4484
1361-6528