The paper examines the structure of porous Fe3O4 + NaCl condensates and analyzes the phase and chemical composition and sizes of Fe3O4 nanoparticles produced by electron beam evaporation and vacuum condensation. It is shown that Fe3O4 nanoparticles in a porous salt matrix are highly adsorptive to air oxygen. The adsorptivity decreases when iron concentration in the condensate increases. Thermogravimetric analysis is used to study the kinetics of variation in the weight of porous NaCl and Fe3O4 + NaCl condensates during heating to 650°C and cooling in air. The results are considered in terms of physical and chemical adsorption. Stabilized colloidal systems of magnetite nanoparticles are obtained. Photon correlation spectroscopy is used to determine their quantitative size distribution in an aqueous solution of surface active agents. The physical method for obtaining nanoparticles in electron beam vacuum setups is highly efficient and competitive with previous methods for synthesis of nanoparticles.
Similar content being viewed by others
References
G. B. Sergeev, Nanochemistry [in Russian], Izd. Mosk. Univ., Moscow (2007), p. 336.
B. E. Paton, B. O. Movchan, and Yu. A. Kurapov, Methods for Producing Nanoparticles for Magnetic Liquids by Electron Beam Evaporation and Vacuum Condensation, Method for Producing Magnetic Liquid and Associated Magnetic Liquid [in Ukrainian], Ukrainian Patent 87177, Bulletin No. 7, Publ. June 25 (2009), p. 2.
B. A. Movchan, Yu. A. Kurapov, and S. M. Romanenko, “Magnetic liquids obtained by electron beam evaporation and condensation of Fe3O4 in vacuum,” in: Proc. Int. Conf. HighMatTech (October 15–19, 2007, Kiev, Ukraine), Kiev (2007), p. 275.
G. A. Ozin, “Nanochemistry⎯synthesis in diminishing dimensions,” Adv. Mater., 4, No. 10, 612–649 (1992).
B. J. Winter, E. K. Parks, and S. J. Riley, “Copper clusters: The interplay between electronic and geometrical structure,” J. Chem. Phys., 94, 8618–8621 (1991).
Yu. A. Kurapov, G. G. Didikin, S. M. Romanenko, et al., “Magnetite nanoparticles obtained by condensation of molecular beams in vacuum,” Sovrem. Électrometall., No. 3(96), 26–28 (2009).
A. D. Lebedev, Yu. N. Levchuk, A. V. Lomakin, et al., Laser Correlation Spectroscopy and Biology [in Russian], Naukova Dumka, Kiev (1987), p. 256.
A. D. Lebedev, A. V. Lomakin, V. A. Noskin, et al., “Use of laser correlation spectroscopy for electrophoresis of biological entities in solutions,” in: Instrumented Methods in Physiology and Biophysics [in Russian], Nauka, Leningrad (1987), pp. 90–95.
A. V. Demchishin and B. A. Movchan, “Structure and some properties of thick vacuum titanium condensates,” Fiz. Khim. Obrab. Mater., No. 1, 45–50 (1967).
M. M. Maiorov, “Measuring the viscosity of ferromagnetic fluid in the magnetic fields,” Magn. Gidrodin., No. 4, 11–18 (1980).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Poroshkovaya Metallurgiya, Vol. 50, No. 3–4 (478), pp. 56–63, 2011.
Rights and permissions
About this article
Cite this article
Movchan, B.A., Kurapov, Y.A., Didikin, G.G. et al. Control of the composition and structure of Fe–O nanoparticles during Fe3O4 electron beam evaporation. Powder Metall Met Ceram 50, 167 (2011). https://doi.org/10.1007/s11106-011-9314-0
Received:
Published:
DOI: https://doi.org/10.1007/s11106-011-9314-0