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Effect of power and treatment time of ultrasonic irradiation on the microstructure, local disorder and point defects of additive free ZnO particles

DOI: 10.1016/j.jallcom.2024.173795 DOI Help

Authors: Maria A. Gomes (Federal University of Sergipe) , Lorena F. A. Domingos (Federal University of Sergipe) , Naiara S. Santos (Federal University of Sergipe) , Adriano B. Andrade (Federal University of Sergipe) , David M. Pickup (University of Kent) , Alan V. Chadwick (University of Kent) , Mário Ernesto G. Valerio (Federal University of Sergipe) , Zélia S. Macedo (Federal University of Sergipe)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Alloys And Compounds , VOL vol. 22

State: Published (Approved)
Published: February 2024
Diamond Proposal Number(s): 14239

Abstract: The present work investigates the influence of ultrasonic irradiation on the properties of ZnO nanostructures. Slurries of ZnO prior formed by co-precipitation were irradiated by low-power ultrasound for different times. The properties of the samples were characterized by X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), Fourier transformed infrared (FTIR) absorption, scanning electron microscopy (SEM) and photoluminescence (PL). Ultrasonic waves induced significant variation in morphology of the particles. Needles, rods, rice-like and fragmented particles were detected in different treated samples. The irradiation also led to the formation of different types of point defects in the ZnO structure, varying in nature and density, which in turn affected the structural local ordering and luminescent efficiency. A possible growth mechanism of the particles is presented, and the type and origin of the formed point defects are discussed.

Journal Keywords: ultrasonic; synthesis; ZnO; properties

Subject Areas: Materials

Instruments: B18-Core EXAFS

Added On: 07/02/2024 09:39

Discipline Tags:

Materials Science Nanoscience/Nanotechnology

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS)