Effect of oxygen partial pressure on the growth of zinc micro and nanostructures

Yuvaraj, D and Rao, K Narasimha and Nanda, KK (2009) Effect of oxygen partial pressure on the growth of zinc micro and nanostructures. In: Journal of Crystal Growth, 311 (18). pp. 4329-4333.

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Abstract

Zinc micro and nanostructures were synthesized in vacuum by condensing evaporated zinc on Si substrate at different gas pressures. The morphology of the grown Zn structures was found to be dependent on the oxygen partial pressure. Depending on oxygen partial pressure it varied from two-dimensional microdisks to one-dimensional nanowire. The morphology and structural properties of the grown micro and nanostructures were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Transmission electron microscopy (TEM) studies on the grown Zn nanowires have shown that they exhibit core/shell-like structures, where a thin ZnO layer forms the shell. A possible growth mechanism behind the formation of different micro and nanostructures has been proposed. In addition, we have synthesized ZnO nanocanal-like structures by annealing Zn nanowires in vacuum at 350 °C for 30 min.

Item Type:	Journal Article
Publication:	Journal of Crystal Growth
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Zinc nanowires;Microdisks;Thermal evaporation;ZnO nanocanals.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics Division of Chemical Sciences > Materials Research Centre
Date Deposited:	29 Oct 2009 08:27
Last Modified:	19 Sep 2010 05:52
URI:	http://eprints.iisc.ac.in/id/eprint/24823

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