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Comparative structure analysis of magnetic fluids at interface with silicon by neutron reflectometry
Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Reg, Russia..
Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Reg, Russia.;Kyiv Taras Shevchenko Natl Univ, Kiev, Ukraine..
Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Reg, Russia.;Kyiv Taras Shevchenko Natl Univ, Kiev, Ukraine..
Kyiv Taras Shevchenko Natl Univ, Kiev, Ukraine..
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2015 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 352, 49-53 p.Article in journal, Meeting abstract (Refereed) Published
Abstract [en]

The adsorption of surfactant coated magnetic nanoparticles from highly stable magnetic fluids on crystalline functionalized silicon is studied by neutron reflectometry. Two types of magnetic fluids based on nanomagnetite dispersed and stabilized in non-polar organic solvent (deuterated benzene) and strongly polar solvent (heavy water) are considered. In both cases the interface shows the formation of just one well-defined adsorption layer of nanoparticles, which is insensitive to the effect of the external magnetic field. Still, the particle concentration in the benzene-based fluid is higher in the vicinity to the silicon surface as compared to the bulk distribution. Despite the presence of an aggregate fraction in the water-based system the width of the adsorption layer is consistent with the size of separated particles, thus showing the preferable adsorption of non-aggregated particles.

Place, publisher, year, edition, pages
2015. Vol. 352, 49-53 p.
Keyword [en]
Magnetic fluids, Ferrofluids, Neutron reflectometry, Nanoparticles adsorption, Structure of layer
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-264599DOI: 10.1016/j.apsusc.2015.02.170ISI: 000361212200011OAI: oai:DiVA.org:uu-264599DiVA: diva2:866070
Conference
10th International Conference on Physics of Advanced Materials (ICPAM), SEP 22-28, 2014, Iasi, ROMANIA
Available from: 2015-10-30 Created: 2015-10-15 Last updated: 2017-12-01Bibliographically approved

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Vorobiev, Alexey A.

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