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Preparation of Copper Nitride (Cu3N) Nanoparticles in Long-Chain Alcohols at 130–200 °C and Nitridation Mechanism
journal contribution
posted on 2014-01-21, 00:00 authored by Takashi Nakamura, Hiromichi Hayashi, Taka-aki Hanaoka, Takeo EbinaIn
our laboratory, we are studying copper nitride (Cu3N) nanoparticles
as a novel conductive ink that is stable to oxidation and can be metallized
at low temperature. In this study, Cu3N nanoparticles prepared
via the reaction of copper(II) acetate monohydrate with ammonia gas
in long-chain alcohol solvents were characterized by X-ray diffraction
analysis, transmission electron microscopy, Fourier transform infrared
spectroscopy, and elemental analysis. In addition, we used thermogravimetry–differential
thermal analysis to compare the thermal decomposition properties of
the prepared Cu3N particles and commercially available
Cu3N particles. The decomposition temperature of the prepared
particles was more than 170 °C lower than that of the commercial
particles. We also examined the influences of the reaction temperature
and the alkyl chain length of the alcohol solvent on the product distribution
of the reaction and the morphology of the particles. Our results indicated
that increasing the solvent hydrophobicity and eliminating water from
the reaction system by increasing the temperature affected the product
distribution. On the basis of an observation of chromatic change of
the reaction solvent and an analysis of the byproducts in the alcohol
solvent after the reaction, we propose a mechanism for the formation
of Cu3N.