Low Temperature Synthesis of ZnO Nanowires with Very High Aspect Ratio: The Effect of Solution Concentration on Nanowire Morphology Grown by Wet Chemical Technique.

Nguyen Q. Khánh ,  János Volk ,  István E. Lukács ,  András Deák ,  Zsolt E. Horváth ,  György Sáfrán ,  Robert Erdély ,  Anita Pongrácz 

Hungarian Academy of Sciences, Research Institute for Technical Physics and Materials Science, P.O.Box 49, Budapest H-1525, Hungary

Abstract

Single-crystalline ZnO nanowires with diameters of about 20 nm and lengths of over 2 µm (aspect ratio >100:1) have been successfully synthesized by a simple hydrothermal treatment of zincnitrate and hexamethylenetetramine aqueous solution at relatively low temperature, i.e. 95 oC. It has been found that solution concentrations of 5 mM or above were favourable for nanorod synthesis, while lower concentrations resulted in formation of thin nanowires. The mechanism of this kind of growth will be discussed and suggested for localization of the nanowire growth. The crystal structure, morphology and the electrical properties of the so grown ZnO nanowires will also be characterized by transmission electron microscopy, scanning electron microscopy and current-voltage measurement, respectively.

 

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Presentation: Oral at E-MRS Fall Meeting 2009, Symposium C, by Nguyen Q. Khánh
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-25 16:45
Revised:   2009-06-07 00:48