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Condens. Matter 2016, 1(1), 10;

Neutron Study of Multilevel Structures of Diamond Gels

Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
Ioffe Institute, 194021 St. Petersburg, Russia
Authors to whom correspondence should be addressed.
Academic Editors: Augusto Marcelli and Antonio Bianconi
Received: 9 November 2016 / Revised: 5 December 2016 / Accepted: 12 December 2016 / Published: 14 December 2016
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The structure of a hydrogel consisting of diamond nanoparticles formed by the explosion method has been studied. Small angle neutron scattering has been used as a method for characterization of the gel. Joint approaches for data analysis in reciprocal and direct space have been developed to restore a multilevel structure. The pristine hydrogel of positively charged diamond particles (~5 nm in size, concentration ~5 wt %), even by four-fold dilution below its formation critical point, (C* ~ 4 wt %) retains practically the original structure where single particles are joined into small groups integrated into chain fractal-type aggregates creating a network. This indicates a local stability of the gel and means a transformation of continuous gel into a system of micro-domains suspended in water. A perfection of the diamond crystals’ facets was revealed that is of principal importance for the configuration of potentials, inducing the diamonds’ electrostatic attraction due to different electric charges of facets. It is distinguished from the results for the suspensions of diamonds in graphene shells that showed a deviation of scattering from Porod’s law. View Full-Text
Keywords: nanodiamond; hydrogel; structure; neutron scattering nanodiamond; hydrogel; structure; neutron scattering

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Lebedev, V.; Kulvelis, Y.; Kuklin, A.; Vul, A. Neutron Study of Multilevel Structures of Diamond Gels. Condens. Matter 2016, 1, 10.

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