Morphological modifications and surface amorphization in ZnO sonochemically treated nanoparticles

Ultrasonics Sonochemistry Volume: 20 Issue: 3 Pages: 799-804 Published: 2013

(a) Selected TEM images of the ZnO-S sample showing a sintering process due to the sonication. (b) Magnified image confirming the coalescence of the sonicated particles.

Writers: Larisa B. Arruda; Marcelo O. Orlandi; Paulo Noronha Lisboa-Filho

Keywords: Semiconductors; Nanoparticles; ZnO; Amorphous; Electron microscopy

Abstract: Application of nanoscale materials in photovoltaic and photocatalysis devices and photosensors are dramatically affected by surface morphology of nanoparticles, which plays a fundamental role in the understanding of the physical and chemical properties of nanoscale materials. Zinc oxide nanoparticles with an average size of 20 nm were obtained by the use of a sonochemical technique. X-ray diffraction (XRD) associated to Rietveld refinements and transmission electron microscopy (TEM) were used to study structural and morphological characteristics of the samples. An amorphous shell approximately 10 nm thick was observed in the ultrasonically treated sample, and a large reduction in particle size and changes in the lattice parameters were also observed.

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DOI: 10.1016/j.ultsonch.2012.11.013

Robson Lima
Sobre Robson Lima 87 Artigos
Atua no Centro de Desenvolvimento de Materiais Funcionais.