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

Study on Structure, Thermal Behavior, and Viscoelastic Properties of Nanodiamond-Reinforced Poly (vinyl alcohol) Nanocomposites

“…It was evident that the ND agglomerates were well dispersed in the PVA matrix. The size of the agglomerates observed with FE-SEM was in good agreement with the TEM measurement ( Figure 5 ) and the USAXS measurements [ 61 ], both of which showed agglomerate sizes around 60 nm. The increase in the ND concentration in PVA-ND/3 ( Figure 6 b) was obvious in comparison with PVA-ND/1 ( Figure 6 a).…”

“…Moreover, the SAXS profiles of the nanocomposites did not differ substantially from the scattering profiles of the initial NDs dispersions used for the preparation of the films prepared in this work. These dispersions were studied in our previous work [ 61 ]. Thus, the structure of the ND aggregates did not substantially change after the addition into the PVA.…”

“…The fractal dimension of the agglomerates, d f , was approximately 1.9–2.0, based on the model fitting. In our previous work on ND dispersions, the second Guinier knee, corresponding to the agglomerates, was observed in Ultra-Small-Angle X-ray Scattering (USAXS) profiles (obtained at the APS synchrotron) [ 61 ]. The same ND dispersions were used for the preparation of the PVA-ND nanocomposites in this work.…”

“…The PVA-ND nanocomposites were prepared by a solution casting method. NDs were prepared according to the synthesis protocol previously published by Kovářík et al [ 61 ]. The light scattering studies of ND dispersions revealed that the mean size of ND aggregates in the dispersions was between ~61 and 73 nm and that the mean size did not show any systematic dependence on the ND concentration [ 61 ].…”

“…NDs were prepared according to the synthesis protocol previously published by Kovářík et al [ 61 ]. The light scattering studies of ND dispersions revealed that the mean size of ND aggregates in the dispersions was between ~61 and 73 nm and that the mean size did not show any systematic dependence on the ND concentration [ 61 ]. The NDs were heat treated (annealing at 450 °C for 3 h in an air atmosphere) to supply them with a negative surface charge to activate the surface chemistry.…”