Inroad to modification of detonation nanodiamond

Preparation and Behavior of Brownish, Clear Nanodiamond Colloids

“…However, no additional feature in the spectrum was uncovered, indicating an inherently featureless spectrum, as observed for various kinds of brown diamonds. [27,28] At this stage, it is difficult to attribute the intrinsic absorption [16] to either the graphitic partial surface [29][30][31] reported previously, [32] nitrogen defects from the explosives, or other color centers such as dislocations, [28] whereas no characteristic FTIR absorption of amber centers have been observed. [27,33] Compared with high-pressure and high-temperature synthesis, the extremely fast crystallization of detonation nanodiamonds [34,35] during propagation of shock waves can cause frequent occurrence of dislocations giving rise to energy levels in the band gap.…”

“…This finding affords us access to the individual primary diamond nanoparticles and their surfaces, providing the most important step toward utilization in various applications, such as quantum dots, [13] diamonds casting/coating, and mechanical reinforcement of other materials, [14,15] as well as toward chemical functionalization of surfaces [16,17] for biological and medical applications. Here, we report the dispersion properties of de-agglutinated detonation nanodiamonds in various nonaqueous solvents, and the pH-dependent dispersion-precipitation behavior of the hydrosols, in addition to a new, facile de-agglutination method via high-power sonication.…”

Structural heterogeneity of diamond-containing detonation material

“…Figure 1 shows the Raman spectrum of a UDDG sample (detonation soot). The broad band at 1312 cm −1 is likely to be a superposition of several contributions [5][6][7]; one of them is the phonon mode of F 2g symmetry (1333 cm…”

Covalent and noncovalent functionalisation and solubilisation of nanodiamond

“…One of the methods employed for covalent surface modification is to treat nanodiamond with acids or oxidising agents to create carboxyl and hydroxyl groups on the surface [1,6,7]. Reaction with fluorine, ammonia and such gases has also been carried out to produce chemical changes on the surfaces [8,9]. Other reactions used are the reaction of silanes with hydroxylated nanodiamonds or reaction of halogenated nanodiamonds with amines and Grignard reagents [8,10].…”