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Updated: May 18, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
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NbN and NaNbN2 particles: selective solid state synthesis and conduction performance.

Liangbiao Wang1, Yongchun Zhu, Liang Shi

  • 1Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, PR China.

Journal of Nanoscience and Nanotechnology
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

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New synthesis methods selectively produce cubic niobium nitride (NbN) and hexagonal sodium niobium nitride (NaNbN2) using metallic reductants. NbN exhibits superconductivity at 17 K, while NaNbN2 is a semiconductor.

Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Inorganic Synthesis

Background:

  • Niobium nitride (NbN) and sodium niobium nitride (NaNbN2) are compounds with interesting electronic properties.
  • Developing selective synthesis routes for these materials is crucial for exploring their applications.

Purpose of the Study:

  • To selectively synthesize cubic NbN and hexagonal NaNbN2.
  • To investigate the influence of metallic reductants (magnesium and aluminum) on the synthesis outcome.
  • To characterize the structural, morphological, and electrical properties of the synthesized materials.

Main Methods:

  • Synthesis of NbN and NaNbN2 via solid-state reaction in a stainless steel autoclave.
  • Utilizing niobium pentoxide (Nb2O5), sodium azide (NaN3), and metallic reductants (Mg or Al).

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  • Characterization using X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and field emission-scanning electron microscopy (FE-SEM).
  • Measurement of electric resistivity to determine superconducting or semiconducting behavior.

    • Main Results:

    • Selective synthesis of cubic NbN at 400°C for 10h using magnesium as a reductant.
    • Selective synthesis of hexagonal NaNbN2 at 700°C for 40h using aluminum as a reductant.
    • NbN particles averaged 100 nm; NaNbN2 particles averaged 500 nm.
    • NbN demonstrated superconductivity with a transition temperature of 17 K.
    • NaNbN2 exhibited semiconductor properties.

    Conclusions:

    • The choice of metallic reductant and reaction conditions allows for selective synthesis of NbN and NaNbN2.
    • Synthesized NbN is a superconductor, and NaNbN2 is a semiconductor, highlighting their distinct electronic characteristics.
    • This work provides a pathway for controlled synthesis of these niobium-based nitrides for potential electronic applications.