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Controllable Synthesis of ZnO Nanonails by Vapor-Solid Process: Growth Mechanism and Structural and Optical Properties

Published online by Cambridge University Press:  01 February 2011

Ahmad Umar ,
Q. Ahsanul Haq ,
Sang Hoon Kim ,
Yeon Ho Im  and
Yoon Bong Hahn
Ahmad Umar
Affiliation:
ybhahn@chonbuk.ac.kr, Chonbuk National University, Department of chemical Engineering and Technology, Jeonju 561-756, Korea, Republic of
Q. Ahsanul Haq
Affiliation:
ybhahn@chonbuk.ac.kr, Chonbuk National University, Department of chemical Engineering and Technology, Jeonju, 561-756, Korea, Republic of
Sang Hoon Kim
Affiliation:
ybhahn@chonbuk.ac.kr, Chonbuk National University, Department of chemical Engineering and Technology, Jeonju, 561-756, Korea, Republic of
Yeon Ho Im
Affiliation:
ybhahn@chonbuk.ac.kr, Chonbuk National University, Department of chemical Engineering and Technology, Jeonju, 561-756, Korea, Republic of
Yoon Bong Hahn
Affiliation:
ybhahn@chonbuk.ac.kr, Chonbuk National University, Department of chemical Engineering and Technology, Jeonju, 561-756, Korea, Republic of
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Abstract

Single-crystalline with good optical properties aligned ZnO nanonails were grown on steel alloy substrate without the use of metal catalyst or additives by the thermal evaporation process using high purity metallic zinc powder and oxygen as source materials for zinc and oxygen, respectively. Detailed morphological studies by FESEM revealed that the obtained nanonails are grown in a high density over the whole substrate surface and are exhibiting perfect hexagonal-shaped caps. The diameters of the nanonails at their tops and bases are ranges from 120∼160nm and 50∼70 nm, respectively. The detailed structural characterizations confirmed that the synthesized nanostructures are single-crystalline and grown along the c-axis direction. Raman scattering and room-temperature photoluminescence studies demonstrated the wurtzite hexagonal phase and good optical properties, respectively for the grown nanonails.

Keywords

nanostructuresemiconductingcrystal growth
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 957: Symposium K – Zinc Oxide and Related Materials , 2006 , 0957-K07-30
Copyright
Copyright © Materials Research Society 2007

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