Синтез и исследование морфологии кобальтсодержащих наночастиц

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Синтез и исследование морфологии кобальтсодержащих наночастиц
ISSN 1812-3368. Вестник МГТУ им. Н.Э. Баумана. Сер. Естественные науки. 2017. № 2 93
Abstract Keywords
The aim of this work is to develop methods of synthesis of
stable monodisperse cobalt sol by the method of chemical
reduction and obtain cobalt thin films on a silicon substrate,
investigate their morphology and geometrical characteristics.
Cobalt acetate was used as a precursor in this study, ascorbic
acid was used as a reducing agent, the synthesis was carried
out in an alcoholic medium. The resulting sol was studied by
the method of photon correlation spectroscopy. Analysis of
the data of the photon correlation spectroscopy revealed the
presence of two fractions in a sample with an average hydro-
dynamic radius of the smaller fraction of about 3.9 nm and the
larger one — 278 nm. Thin cobalt films were obtained by the
method of drying the sol and method of rotating substrate
coating. The obtained films were studied by the methods of
energy dispersive analysis and atomic force microscopy.
Analysis of AFM images of the film surface allowed us to
make the conclusion about the shape and size of cobalt nano-
particles. Investigation of the morphology of nanoparticles
deposited on the silicon substrate Co showed that the cobalt
particles obtained by the method of drying sol films have a
form of an elongated semi-ellipsoid with average typical
dimensions of 50 to 350 nm and a height of 150 to 900 nm.
The films obtained by method of deposition on a rotating
substrate formed by particles have a shape of ellipsoidal sector
with typical dimensions of 200 to 450 nm and a height of 10 to
50 nm
Cobalt nanoparticles, chemical re-
duction method, atomic force mi-
croscopy, thin films, photon correla-
tion spectroscopy, energy dispersive
analysis
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