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Morphological modifications and surface amorphization in ZnO sonochemically treated nanoparticles.

Larisa B Arruda¹, Marcelo O Orlandi, Paulo Noronha Lisboa-Filho

¹POSMAT - Programa de Pós-Graduação em Ciência e Tecnologia de Materiais UNESP, Bauru, Brazil.

Ultrasonics Sonochemistry

|January 1, 2013

Summary

Sonochemical treatment produced 20nm zinc oxide nanoparticles with an amorphous shell. This technique altered particle size and lattice parameters, impacting material properties for applications.

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Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Nanoscale materials' surface morphology is crucial for photovoltaic, photocatalysis, and photosensor device performance.
Understanding nanoparticle physical and chemical properties necessitates detailed surface morphology analysis.

Purpose of the Study:

To synthesize zinc oxide nanoparticles using a sonochemical technique.
To characterize the structural and morphological properties of the synthesized nanoparticles.

Main Methods:

Sonochemical synthesis of zinc oxide nanoparticles.
X-ray diffraction (XRD) with Rietveld refinements for structural analysis.
Transmission electron microscopy (TEM) for morphological characterization.

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Main Results:

Zinc oxide nanoparticles with an average size of 20nm were successfully synthesized.
An amorphous shell approximately 10nm thick was observed on ultrasonically treated nanoparticles.
Significant reduction in particle size and alterations in lattice parameters were detected.

Conclusions:

Sonochemical treatment effectively modifies zinc oxide nanoparticle morphology and structure.
The observed amorphous shell and reduced particle size are key outcomes of the sonochemical process.
These structural changes have implications for the performance of nanoscale materials in various applications.