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Title: Large-area zinc oxide nanorod arrays templated by nanoimprint lithography: Control of morphologies and optical properties
Authors: Zhang C. 
Huang X. 
Liu H. 
Chua S.J. 
Ross C.A.
Keywords: II-VI semiconductors
Optical properties
Screw dislocations
Zinc oxide
Control of morphology
lasing behavior
Morphology control
Multifunctional devices
Solution synthesis
Two-dimensional nucleation
Zinc oxide nanorod arrays
ZnO nanorod
Nanoimprint lithography
Issue Date: 2016
Publisher: Institute of Physics Publishing
Citation: Zhang C., Huang X., Liu H., Chua S.J., Ross C.A. (2016). Large-area zinc oxide nanorod arrays templated by nanoimprint lithography: Control of morphologies and optical properties. Nanotechnology 27 (48) : 485604. ScholarBank@NUS Repository.
Abstract: 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. © 2016 IOP Publishing Ltd.
Source Title: Nanotechnology
ISSN: 0957-4484
DOI: 10.1088/0957-4484/27/48/485604
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