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Pb(core)/ZnO(shell) nanowires obtained by microwave-assisted method.

F Solis-Pomar1, Mf Meléndrez, R Esparza

  • 1Laboratorio de Nanociencias y Nanotecnología CICFiM (FCFM), Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 66450, México. eduardo.pereztj@uanl.edu.mx.

Nanoscale Research Letters
|October 12, 2011
PubMed
Summary

Researchers developed a novel method to create lead-filled zinc oxide nanowires (Pb/ZnO). This microwave-assisted synthesis yields core-shell structures with potential applications in nanotechnology.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Chemistry

Background:

  • Zinc oxide (ZnO) nanowires are versatile nanomaterials with diverse applications.
  • Core-shell nanostructures offer enhanced properties compared to their single-component counterparts.
  • Lead (Pb) incorporation can modify the electronic and optical properties of ZnO.

Purpose of the Study:

  • To synthesize novel lead-filled ZnO nanowires (Pb/ZnO) using a simple, one-step method.
  • To characterize the structural and morphological properties of the synthesized Pb/ZnO nanowires.
  • To investigate the synthesis mechanism of these core-shell nanostructures.

Main Methods:

  • Microwave-assisted decomposition of zinc ferrite in a conventional oven.
  • One-step vapor transport and condensation technique.
  • High-resolution transmission electron microscopy (HRTEM) for structural analysis.

Main Results:

  • Successful synthesis of Pb-filled ZnO nanowires with a Pb core and ZnO shell.
  • Pb core exhibits a face-centered cubic (fcc) structure, growing preferentially in the [111] direction.
  • ZnO shell displays a hexagonal wurtzite structure, growing along the [001] direction.
  • Synthesized nanowires exceed 5 μm in length, with average shell and core diameters of 21.00 ± 3.00 nm and 4.00 ± 1.00 nm, respectively.

Conclusions:

  • A facile and novel microwave-assisted synthesis route for Pb/ZnO core-shell nanowires has been established.
  • The structural analysis confirms the formation of distinct Pb core and ZnO shell components with specific crystallographic orientations.
  • The study provides insights into the experimental conditions, structural details, and synthesis mechanism of these promising nanomaterials.