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Published in: Journal of Nanoparticle Research 2/2020

01-01-2020 | Research Paper

Particle size analysis and characterization of nanodiamond dispersions in water and dimethylformamide by various scattering and diffraction methods

Authors: Tomáš Kovářík, Petr Bělský, David Rieger, Jan Ilavsky, Věra Jandová, Michael Maas, Pavol Šutta, Michal Pola, Rostislav Medlín

Published in: Journal of Nanoparticle Research | Issue 2/2020

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Abstract

Over the past few decades, detonation nanodiamonds (NDs) have gained increased attention due to their unique physicochemical properties. Various methods for preparation of ND suspensions have been introduced. This paper presents thermally annealed nanodiamonds dispersed via sonication and separated by centrifugation in deionized water and dimethylformamide in five weight concentrations ranging from 0.05 to 1 wt%. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were applied to study the thermal behavior of NDs. Crystallographic properties of air-annealed and dispersed NDs were examined by means of X-ray diffraction (XRD). Nanodiamond dispersions were analyzed by static light scattering (SLS), dynamic light scattering (DLS), ultra-small- and small-angle X-ray scattering (USAXS/SAXS), and high-resolution transmission electron microscopy (HRTEM). SLS and DLS give similar results of ND aggregates mean size between ~ 61 and 73 nm, regardless of solvent type and nanoparticle concentration. For dispersions with increasing concentrations of NDs, neither increased aggregate size nor different kinetics of separation during sonication and centrifugation were observed. USAXS/SAXS provided the aggregates size (2Rg) in the range from 57 to 65 nm and size of primary particles from 5.4 to 5.8 nm. HRTEM also showed presence of larger aggregates with tens of nanometers in size in both water and DMF dispersions, and size of primary particles ranging from 5.5 to 6 nm in very good agreement with SAXS.

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Appendix
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Literature
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Metadata
Title
Particle size analysis and characterization of nanodiamond dispersions in water and dimethylformamide by various scattering and diffraction methods
Authors
Tomáš Kovářík
Petr Bělský
David Rieger
Jan Ilavsky
Věra Jandová
Michael Maas
Pavol Šutta
Michal Pola
Rostislav Medlín
Publication date
01-01-2020
Publisher
Springer Netherlands
Published in
Journal of Nanoparticle Research / Issue 2/2020
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-020-4755-3

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