Sol-Gel Transition in Nanodiamond Aqueous Dispersions by Small-Angle Scattering

0507626 - ÚJF 2020 RIV US eng J - Journal Article
Tomchuk, O. V. - Avdeev, M. V. - Aleksenskii, A. E. - Vul, A. Y. - Ivankov, O. I. - Ryukhtin, Vasil - Fuzi, J. - Garamus, V. M. - Bulayin, L. A.
Sol-Gel Transition in Nanodiamond Aqueous Dispersions by Small-Angle Scattering.
Journal of Physical Chemistry C. Roč. 123, č. 29 (2019), s. 18028-18036. ISSN 1932-7447. E-ISSN 1932-7455
R&D Projects: GA MŠMT LM2015056
Institutional support: RVO:61389005
Keywords : small-angle scattering * ultrasmall-angle neutron scattering * nanodiamonds
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.189, year: 2019
Method of publishing: Limited access
https://doi.org/10.1021/acs.jpcc.9b03175

This paper reports the results of the comparative structural characterization of detonation nanodiamond particles and their aggregates in hydrosols and hydrogels by small-angle scattering (SAS) techniques. The data from different neutron and X-ray (synchrotron radiation) diffractometers cover a wide range of momentum transfer and show multilevel structure organizations at the size scale from 1 to 1000 nm and higher. For this purpose, in addition to the conventional SAS techniques the methods of very small-angle and ultrasmall-angle neutron scattering were applied. The fraction of nanodiamond particles in the aggregates is determined. A complex twostep mechanism of nanodiamond cluster association into a network during the sol gel transition is revealed. It is assumed that a reason for the reversibility of this process is a different compactness of the corresponding structural levels defined by different fractal organizations.
Permanent Link: http://hdl.handle.net/11104/0298608