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Sol-gel synthesis and optical properties of ZnO powder

A. MATEI1,2,* , L. DUMITRESCU2, I. CERNICA1, V. SCHIOPU1, A. DINESCU1, M. DANILA1, I. MIHALACHE1, I. MANCIULEA2

Affiliation

  1. National Institute for Research and Development in Microtehnologies Bucharest, Erou Iancu Nicolae Street, 126A, 077190, Romania
  2. Transilvania University of Brasov, B-dul Eroilor 29, 500036, Romania

Abstract

Zinc oxide (ZnO) powders with various morphologies present unique properties and can be used in technological applications, such as optics, electronics, ceramics, coatings, biology and many other areas. This paper presents the synthesis and characterization of ZnO powder by sol-gel method using different types of solvents. After drying process, the samples were annealed at 500°C to obtain nanocrystalline ZnO powders. The morphology, composition and optical properties of the obtained powders were investigated by using scanning electronic microscopy (SEM), X-ray diffractometry (XRD), Fourier transformed infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX) and photoluminescence (PL). The characterization reveals that the ZnO samples consist of a mixture of nanoparticles and nanorods with different size and shape. The X-ray diffraction also determined the ZnO nanoparticles have a high purity, wurtzite crystalline structure. Based on these results, the properties of the ZnO samples were correlated with their morphology and structure..

Keywords

Zinc oxide, Nanopowder, Sol-gel method, Characterization.

Submitted at: March 25, 2013
Accepted at: July 11, 2013

Citation

A. MATEI, L. DUMITRESCU, I. CERNICA, V. SCHIOPU, A. DINESCU, M. DANILA, I. MIHALACHE, I. MANCIULEA, Sol-gel synthesis and optical properties of ZnO powder, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 703-706 (2013)