Liquid Phase Morphology Control of ZnO Nanowires, Ellipse Particles, Hexagonal Rods, and Particle in Aqueous Solutions

Yoshitake Masuda,Naoto Kinoshita,Kunihito Koumoto

doi:10.5402/2012/379510

Abstract

Liquid phase morphology control of ZnO crystals was realized with simple aqueous solution system. ZnO nanowires were successfully fabricated at 50∘C. They were over 50 μm in length and about 100 nm in width. Aspect ratio was estimated to be over 500. They had no branches and were obtained without aggregations. Curved nano-wires clearly indicated high flexibility and high mechanical strength. Additionally, ellipse particles, hexagonal rods and particles were fabricated in the solutions. Morphology, crystal growth speed, and preferred growth faces were well-controlled by precise adjustment of growth conditions.

Highlights

Metal oxides have been used for electronic devices, optoelectronic device, and so forth
Liquid phase morphology control of ZnO crystals was realized with simple aqueous solution system
Octadecyltrichlorosilane (OTS, C18H37SiCl3, Acros Organics), anhydrous toluene (Aldrich Chemical Co., Inc.), zinc acetate (Zn(CH3COO)2, Kishida Chemical Co., Ltd.), ammonia (28% solution, Kishida), NaOH, HCI, ethanol, and acetone were used as received

Summary

Introduction

Metal oxides have been used for electronic devices, optoelectronic device, and so forth. Expectations for metal oxide nanostructures have increased recently for future applications. Syntheses of novel metal oxide nanostructures and development of their applications are under intense investigation [1,2,3,4,5,6,7,8]. The nanowires have high electrical conductivity along the longer direction They have large surface area due to high aspect ratio of the shape. Hydrophobic surface of SAMs accelerated deposition of ZnO nanostructures rather than hydrophilic silanol group surfaces [35]. These studies contributed development of future ZnO devices.

Experimental Details

Results and Discussion

Conclusions