Facile synthesis of superconducting NbN nanoparticles

Xianguo Liu; Guiping Zhou; Siu Wing Or; Songlin Ran; Yuping Sun

doi:10.1016/j.ceramint.2014.08.053

Facile synthesis of superconducting NbN nanoparticles

Xianguo Liu, Guiping Zhou, Siu Wing Or, Songlin Ran, Yuping Sun

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

4 Citations (Scopus)

Abstract

Face-centered cubic NbN (δ-NbN) nanoparticles have been synthesized by arc-discharging Nb ingot in a mixture of H2, Ar and N2. The presence of δ-NbN is attributed to the high surface energy of nanoparticles and the nonequilibrium condition during the arc-discharging process. NbN nanoparticles are of irregular spherical shape, and the diameter distribution is from 5 to 15 nm. The critical temperature of superconducting transition in NbN nanoparticles is determined to be 15.1 K, which is slightly less than that for the bulk counterpart. The difference is attributed to the fact that the size of NbN nanoparticles is comparable with the coherence length of NbN.

Original language	English
Pages (from-to)	849-852
Number of pages	4
Journal	Ceramics International
Volume	41
Issue number	1
DOIs	https://doi.org/10.1016/j.ceramint.2014.08.053
Publication status	Published - 1 Jan 2014

Keywords

Magnetic
Nanoparticles
NbN
Superconducting

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2014.08.053

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title = "Facile synthesis of superconducting NbN nanoparticles",

abstract = "Face-centered cubic NbN (δ-NbN) nanoparticles have been synthesized by arc-discharging Nb ingot in a mixture of H2, Ar and N2. The presence of δ-NbN is attributed to the high surface energy of nanoparticles and the nonequilibrium condition during the arc-discharging process. NbN nanoparticles are of irregular spherical shape, and the diameter distribution is from 5 to 15 nm. The critical temperature of superconducting transition in NbN nanoparticles is determined to be 15.1 K, which is slightly less than that for the bulk counterpart. The difference is attributed to the fact that the size of NbN nanoparticles is comparable with the coherence length of NbN.",

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AU - Liu, Xianguo

AU - Zhou, Guiping

AU - Or, Siu Wing

AU - Ran, Songlin

AU - Sun, Yuping

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Face-centered cubic NbN (δ-NbN) nanoparticles have been synthesized by arc-discharging Nb ingot in a mixture of H2, Ar and N2. The presence of δ-NbN is attributed to the high surface energy of nanoparticles and the nonequilibrium condition during the arc-discharging process. NbN nanoparticles are of irregular spherical shape, and the diameter distribution is from 5 to 15 nm. The critical temperature of superconducting transition in NbN nanoparticles is determined to be 15.1 K, which is slightly less than that for the bulk counterpart. The difference is attributed to the fact that the size of NbN nanoparticles is comparable with the coherence length of NbN.

AB - Face-centered cubic NbN (δ-NbN) nanoparticles have been synthesized by arc-discharging Nb ingot in a mixture of H2, Ar and N2. The presence of δ-NbN is attributed to the high surface energy of nanoparticles and the nonequilibrium condition during the arc-discharging process. NbN nanoparticles are of irregular spherical shape, and the diameter distribution is from 5 to 15 nm. The critical temperature of superconducting transition in NbN nanoparticles is determined to be 15.1 K, which is slightly less than that for the bulk counterpart. The difference is attributed to the fact that the size of NbN nanoparticles is comparable with the coherence length of NbN.

KW - Magnetic

KW - Nanoparticles

KW - NbN

KW - Superconducting

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DO - 10.1016/j.ceramint.2014.08.053

M3 - Journal article

SN - 0272-8842

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EP - 852

JO - Ceramics International

JF - Ceramics International

IS - 1

ER -

Facile synthesis of superconducting NbN nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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