Structure analysis of aqueous ferrofluids at interface with silicon: neutron reflectometry data

3rd International Conference on Small Angle Neutron Scattering dedicated to the 80 anniversary of Yu.M. Ostanevich

Gapon, I.V.^1,2 ; Petrenko, V.I.^1,2 ; Bulavin, L.A.^2 ; Balasoiu, M.^1,3 ; Kubovcikova, M.^4 ; Zavisova, V.^4 ; Koneracka, M.^4 ; Kopcansky, P.^4 ; Chiriac, H.^5 ; Avdeev, M.V.^1

Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia^1

Taras Shevchenko National University of Kyiv, Kyiv, Ukraine^2

National Institute of Physics and Nuclear Engineering, Bucharest, Romania^3

Institute of Experimental Physics, SAS, Kosice, Slovakia^4

National Institute of Research, Development for Technical Physics, Iasi, Romania^5

关键词: Adsorption characteristic;    Adsorption of nanoparticles;    Aqueous ferrofluids;    Cobalt ferrite nanoparticles;    Crystalline silicons;    Magnetic nano-particles;    Neutron reflectometry;    Structure analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/848/1/012015/pdf
DOI  :  10.1088/1742-6596/848/1/012015

来源: IOP

【 摘 要 】

Adsorption of nanoparticles from aqueous ferrofluids (FFs) on solid surface (crystalline silicon) was studied by neutron reflectometry (NR). Two kinds of FFs were considered. First kind was heavy water-based ferrofluids with magnetite nanoparticles coated by double layer of sodium oleate. Second one FF was cobalt ferrite nanoparticles stabilized by lauric acid/sodium n-dodecylsulphate layer and dispersed in water. It was obtained only a single adsorption layer for two types of ferrofluids. The impact of the magnetic nanoparticles concentration and geometry was considered in frame of the adsorption characteristic of FFs.