Nanoparticles of superconducting {gamma}-Mo{sub 2}N and {delta}-MoN

Journal Article · Mon Jan 15 04:00:00 EST 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.10.020· OSTI ID:21015649

Gomathi, A ^[1]; Sundaresan, A ^[1]; Rao, C N.R. , ^[1]

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1. Chemistry and Physics of Materials Unit, DST Unit on Nanoscience and CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064 (India)

We have been able to prepare nanoparticles ({approx}4 nm diameter) of cubic {gamma}-Mo{sub 2}N by a simple procedure involving the reaction of MoCl{sub 5} with urea at 873 K. The nanoparticles show a superconducting transition around 6.5 K. The {gamma}-Mo{sub 2}N nanoparticles are readily transformed to nanoparticles of {delta}-MoN with a slightly larger diameter on heating in a NH{sub 3} atmosphere at 573 K. Phase-pure {delta}-MoN obtained by this means shows a superconducting transition around 5 K. - Graphical abstract: TEM image of the {gamma}-Mo{sub 2}N particles with the inset showing the resistivity of the sample as a function of temperature.

• OSTI ID: 21015649
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIA
MOLYBDENUM CHLORIDES
MOLYBDENUM NITRIDES
NANOSTRUCTURES
PARTICLES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
TRANSMISSION ELECTRON MICROSCOPY
UREA