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Quantum Size Effects in Zinc Oxide Nanoclusters Synthesized by Reactive Sublimation

Published online by Cambridge University Press:  25 February 2011

Jackie Y. Ying  and
Gregory Mcmahon
Jackie Y. Ying
Affiliation:
Dept. of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
Gregory Mcmahon
Affiliation:
Institut für Neue Materialien, Universität des Saarlandes, 6600 Saarbrücken, Germany
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Abstract

Nanostructured ZnO materials were synthesized by a novel reactive sublimation process, followed by cluster consolidation. The zinc oxide nanometer-sized grains were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoacoustic Fourier-transform infrared spectroscopy (PA-FTIR). These techniques illustrate the crystallization and grain growth of the ZnO nanostructured materials in a sequence of heat treatments. Peak sharpening and red-shifting of the phonon band in PA-FTIR spectra of ZnO nanoclusters demonstrate the reduction of finite crystal size effects during annealing. The high surface area and adsorbed species in ZnO nanoclusters were eliminated after sintering at a low temperature of 800 °C. The nanometer-sized ZnO particles have promising electronic and optical properties associated with the quantum size effects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 286: Symposium J – Nanophase and Nanocomposite Materials , 1992 , 73
Copyright
Copyright © Materials Research Society 1993

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