|
|||||
|
|
SANS analysis of aqueous dispersions of Eu- and Gd-grafted nanodiamond particles |
|
| Authors: | Oleksandr V. Tomchuk Vasyl Ryukhtin Oleksandr Ivankov Aleksandr Ya. Vul’ Aleksandr E. Aleksenskii Leonid A. Bulavin |
| Affiliation: | 1. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia;2. Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine;3. tomchuk@jinr.ru;5. Neutron Physics Department, Nuclear Physics Institute, ASCR, v.v.i, ?e?, Czechia;6. Institute for Safety Problems of Nuclear Power Plants, Chornobyl, Ukraine;7. Moscow Institute of Physics and Technology, Dolgoprudny, Russia;8. Ioffe Physical-Technical Institute, St. Petersburg, Russia;9. Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine |
| Abstract: | AbstractThe structure of detonation nanodiamond aqueous dispersions grafted by europium or gadolinium atoms was investigated by small-angle neutron scattering over a wide size scale from 1 to 3000?nm. Similar to the previous studies of nanodiamond suspensions, a strong association of the particle into developed aggregates was revealed. While the characteristic aggregate size depends on the modification of the dispersions and varies in a wide interval of 35–1500?nm, the fractal character of clusters of nanodiamond particles (packed in a specialized branched form with a fractal dimension of 2.4) remains unchanged independent of the cluster size. The effect of the aggregate size increase upon grafting is considered as a basis for the stability reduction mechanism at the microstructural level. |
| Keywords: | Nanodiamond surface grafting small-angle neutron scattering |