Geodesic
The effect of microtube formation with walls, containing Fe$_3$O$_4$ nanoparticles, via gas-solution interface technique by hydrolysis of the FeCl$_2$ and FeCl$_3$ mixed solution with gaseous ammonia
Nanosistemy: fizika, himiâ, matematika, Tome 8 (2017) no. 4, pp. 471-475.

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In this work, microtubes with walls, containing Fe$_3$O$_4$ nanoparticles, obtained by “rolling up” of the interfacial films, were synthesized by the gas-solution interface technique (GSIT), using a mixture of aqueous solutions of FeCl$_2$ and FeCl$_3$ and gaseous ammonia. The synthesized microtubes were characterized by Scanning Electronic Microscopy (SEM), Energy-Dispersive X-ray spectroscopy (EDX), X-Ray Diffraction analysis (XRD) and magnetization measurements. It was established that under optimal synthetic conditions the microtube diameter ranged from 5 to 10 $\mu$m, the length was up to 120 $\mu$m and the thickness of walls was about 0.6 m, the walls themselves being formed by nanoparticles with a size of about 10 nm. The reversible hysteresis behavior, the low coercive force, the low remanence magnetization and the approaching of M$_r$/M$_s$ to zero, confirmed the superparamagnetic nature of the synthesized microtubes. A hypothesis on the formation of microtubes by the gas-solution interface technique was proposed.
Keywords: Fe$_3$O$_4$, magnetic behavior, superparamagnetic
Mots-clés : microtubes, Gas-Solution Interface, GSIT. 
@article{NANO_2017_8_4_a8,
     author = {V. E. Gurenko and V. P. Tolstoy and L. B. Gulina},
     title = {The effect of microtube formation with walls, containing {Fe}$_3${O}$_4$ nanoparticles, via gas-solution interface technique by hydrolysis of the {FeCl}$_2$ and {FeCl}$_3$ mixed solution with gaseous ammonia},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {471--475},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2017_8_4_a8/}
}
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V. E. Gurenko; V. P. Tolstoy; L. B. Gulina. The effect of microtube formation with walls, containing Fe$_3$O$_4$ nanoparticles, via gas-solution interface technique by hydrolysis of the FeCl$_2$ and FeCl$_3$ mixed solution with gaseous ammonia. Nanosistemy: fizika, himiâ, matematika, Tome 8 (2017) no. 4, pp. 471-475. http://geodesic.mathdoc.fr/item/NANO_2017_8_4_a8/