Title: Synthesis and random laser application of ZnO nano-walls: a review

Authors: L. Miao, S. Tanemura, H.Y. Yang, S.P. Lau

Addresses: Key Laboratory of Renewable Energy and Gas Hydrate, Gangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2, Nengyuan Rd., Wushan, Tianhe District, Guangzhou, 510640, PR China. ' Materials R&D Laboratory, Japan Fine Ceramics Centre, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan. ' School of Electrical and Electronic Engineering, Nanyang Technological University, Block S2, Nanyang Avenue, 639798 Singapore. ' School of Electrical and Electronic Engineering, Nanyang Technological University, Block S2, Nanyang Avenue, 639798 Singapore

Abstract: This review paper summarises briefly some important achievements of our recent research on the synthesis and novel applications of nanostructure ZnO such as honeycomb shaped 3-D (dimension) nano random-walls. A chemical reaction/vapour transportation deposition technique was employed to fabricate this structure on ZnO/SiO₂/Si substrate without any catalyst and additive in a simple tube furnace to aim the low-cost and high qualified samples. Random laser action with strong coherent feedback at the wavelength between 375 nm and 395 nm has been firstly observed under 355 nm optical excitation with threshold pumping intensity of 0.38 MW/cm².

Keywords: ZnO; zinc oxide; nanowall structures; synthesis; vapour transportation deposition; random laser action; low threshold pumping; nanostructures; nanotechnology.

DOI: 10.1504/IJNT.2009.025310

International Journal of Nanotechnology, 2009 Vol.6 No.7/8, pp.723 - 734

Published online: 18 May 2009 *

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