Trimming of aqueous chemically grown ZnO nanorods into ZnO nanotubes and their comparative optical properties

Israr, M. Q.; Sadaf, J. R.; Yang, L. L.; Nur, O.; Willander, M.; Palisaitis, J.; Persson, P. O. Å.
August 2009
Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p073114
Academic Journal
Highly oriented ZnO nanotubes were fabricated on a silicon substrate by aqueous chemical growth at low temperature (<100 °C) by trimming of ZnO nanorods. The yield of nanotubes in the sample was 100%. Photoluminescence spectroscopy of the nanotubes reveals an enhanced and broadened ultraviolet (UV) emission peak, compared with the initial nanorods. This effect is attributed to whispering gallery mode resonance. In addition, a redshift of the UV emission peak is also observed. Enhancement in the deep defect band emission in the nanotubes compared to nanorods was also manifested as a result of the increased surface area.


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