title: Morphological modifications and surface amorphization in ZnO sonochemically treated nanoparticles.
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 20nm 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 10nm thick was observed in the ultrasonically treated sample, and a large reduction in particle size and changes in the lattice parameters were also observed.
authors.affiliation: POSMAT - Programa de Pós-Graduação em Ciência e Tecnologia de Materiais UNESP, Bauru, Brazil.
authors.forename: Larisa B
authors.initials: LB
authors.lastname: Arruda
authors.forename: Marcelo O
authors.initials: MO
authors.lastname: Orlandi
authors.forename: Paulo Noronha
authors.initials: PN
authors.lastname: Lisboa-Filho