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Oriented Mn-doped CuO nanowire arrays.

Dongqiang Han1, Zhaofeng Wu, Zhihe Wang

  • 1Department of Physics, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China.

Nanotechnology
|February 20, 2016
PubMed
Summary
This summary is machine-generated.

Oriented nanowire arrays of manganese-doped copper oxide (Mn-CuO) were successfully fabricated. These magnetic semiconductor nanostructures exhibit ferromagnetic properties, showing potential for spintronics applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Diluted magnetic semiconductors (DMS) are crucial for spintronics.
  • Controlling the morphology and properties of DMS materials at the nanoscale is essential for device integration.
  • Manganese-doped copper oxide (Mn-CuO) is a promising DMS material.

Purpose of the Study:

  • To fabricate oriented nanowire arrays of Mn-doped CuO using anodic aluminum oxide membranes.
  • To investigate the structural, morphological, and magnetic properties of the synthesized Mn-CuO nanowires.
  • To assess the potential of these nanostructures for spintronics applications.

Main Methods:

  • Fabrication of oriented Mn-doped CuO nanowire arrays using anodic aluminum oxide membranes as nanoreactors.
  • Synthesis employing manganese nitrate hydrate and copper nitrate hydrate as precursors.
  • Characterization using X-ray diffraction (XRD) for purity analysis.
  • Morphological analysis via scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
  • Magnetic property evaluation through low-temperature magnetic measurements.

Main Results:

  • High-purity oriented nanowire arrays of Mn-doped CuO were successfully synthesized.
  • The nanowires exhibited uniform morphology with a diameter of approximately 170 nm and a high aspect ratio (several tens of micrometers in length).
  • Ferromagnetic properties were observed in the Mn-doped CuO nanowire arrays with a critical temperature around 80 K.

Conclusions:

  • Anodic aluminum oxide membranes effectively serve as nanoreactors for controlled synthesis of oriented Mn-doped CuO nanowires.
  • The synthesized Mn-doped CuO nanowires possess desirable structural and morphological characteristics for advanced applications.
  • The observed ferromagnetism at a notable critical temperature highlights the potential of these nanostructures in future spintronic devices.