Study of the structural features of ε-Co nanoparticles synthesized by cobalt carbonyl decomposition in the presence of surfactant

Journal Article · Wed Nov 15 00:00:00 EST 2017 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774517060128· OSTI ID:22758319

Nikolaichik, V. I. ^[1]; Volkov, V. V.; Avilov, A. S. ^[2]; Gubin, S. P. ^[3]

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1. Russian Academy of Sciences, Institute of Microelectronics Technology and High Purity Materials (Russian Federation)
2. Russian Academy of Sciences, Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Scientific Research Center (Russian Federation)
3. Russian Academy of Sciences, Kurnakov Institute of General and Inorganic Chemistry (Russian Federation)

Cobalt nanoparticles (3–7 nm in size) obtained by cobalt carbonyl decomposition in 1,2-dichlorobenzene in the presence of surfactants (trioctylphosphine oxide and oleic acid) have been studied by a complex of structural methods: small-angle X-ray scattering, electron diffraction, and transmission electron microscopy. The nanoparticles synthesized are found to consist of the cubic ε-Со phase; their crystal structure is described within the sp. gr. P4{sub 1}32, a = 6.097 Å. Using small-angle X-ray scattering, the size and shape of nanoparticles have been determined directly in the liquid dispersion. Most of the particles have a spherical shape; their average size is ≈3.5 ± 0.5 nm, which agrees with the electron microscopy data. Possible factors causing the ε-phase formation during synthesis of metallic Co nanoparticles are discussed.

• OSTI ID: 22758319
• Journal Information: Crystallography Reports, Vol. 62, Issue 6; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBONYLS
COBALT
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTRON DIFFRACTION
LIQUIDS
NANOPARTICLES
OLEIC ACID
SHAPE
SMALL ANGLE SCATTERING
SPHERICAL CONFIGURATION
SURFACTANTS
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
TRIOCTYLPHOSPHINE OXIDE
X-RAY DIFFRACTION