Hydrothermal preparation of hydrophobic and hydrophilic nanoparticles of iron oxide and a modification with CM-dextran

0395148 - FZÚ 2014 RIV NL eng J - Journal Article
Repko, A. - Nižňanský, D. - Matulková, Irena - Kalbáč, Martin - Vejpravová, Jana
Hydrothermal preparation of hydrophobic and hydrophilic nanoparticles of iron oxide and a modification with CM-dextran.
Journal of Nanoparticle Research. Roč. 15, č. 7 (2013), s. 1-9. ISSN 1388-0764. E-ISSN 1572-896X
Institutional support: RVO:68378271 ; RVO:61388955
Keywords : superparamagnetism * magnetite * carboxymethyl dextran * hydrothermal synthesis * nanocrystals
Subject RIV: BM - Solid Matter Physics ; Magnetism; CF - Physical ; Theoretical Chemistry (UFCH-W)
Impact factor: 2.278, year: 2013

Hydrophobic and hydrophilic particles of iron oxide (magnetite/maghemite) with diameter of 6–10 nm were prepared by hydrothermal hydrolysis of iron oleate in water/pentanol/oleic acid system at 180 °C. The hydrophobic/hydrophilic nature of resulting particles was controlled by the presence of sodium oleate and by manipulating the ionic strength (with NaCl). The final particle size was controlled by additional organic solvent (octanol or toluene) and by seed growth. Hydrophilic particles (6 nm) were further modified by carboxymethyl-dextran in water to obtain stable and well-dispersed superparamagnetic nanoparticles suitable for biomedical application. The prepared particles were characterized by transmission electron microscopy, thermogravimetry, Fourier-transform infrared spectroscopy, magnetic measurements, Mössbauer spectroscopy, dynamic light scattering, and zeta-potential measurement.
Permanent Link: http://hdl.handle.net/11104/0223255