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Journal of Nanomaterials
Volume 2007, Article ID 73824, 4 pages
Research Article

Diameter Control and Photoluminescence of ZnO Nanorods from Trialkylamines

Department of Applied Physics and Applied Mathematics, Materials Research Science and Engineering Center, Columbia University, 500 W 120th Street, New York, NY 10027, USA

Received 16 February 2007; Accepted 25 April 2007

Academic Editor: Ping Xiao

Copyright © 2007 Tamar Andelman et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel solution method to control the diameter of ZnO nanorods is reported. Small diameter (2-3 nm) nanorods were synthesized from trihexylamine, and large diameter (50–80 nm) nanorods were synthesized by increasing the alkyl chain length to tridodecylamine. The defect (green) emission of the photoluminescence (PL) spectra of the nanorods varies with diameter, and can thus be controlled by the diameter control. The small ZnO nanorods have strong green emission, while the large diameter nanorods exhibit a remarkably suppressed green band. We show that this observation supports surface oxygen vacancies as the defect that gives rise to the green emission.