Size and nitrogen inhomogeneity in detonation and laser synthesized primary nanodiamond particles revealed via salt-assisted deaggregation

0541737 - FZÚ 2022 RIV US eng J - Journal Article
Stehlík, Štěpán - Henych, Jiří - Štenclová, Pavla - Král, Robert - Zemenová, Petra - Pangrác, Jiří - Vaňek, O. - Kromka, Alexander - Rezek, B.
Size and nitrogen inhomogeneity in detonation and laser synthesized primary nanodiamond particles revealed via salt-assisted deaggregation.
Carbon. Roč. 171, Jan (2021), s. 230-239. ISSN 0008-6223. E-ISSN 1873-3891
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110; GA ČR(CZ) GJ18-11711Y
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271 ; RVO:61388980
Keywords : detonation nanodiamond * salt-assisted ultrasonic deaggregation * size distribution * colloidal solution * nitrogen * inhomogeneity * surface chemistry
OECD category: Nano-materials (production and properties); Inorganic and nuclear chemistry (UACH-T)
Impact factor: 11.307, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.carbon.2020.09.026

Here we innovated the salt-assisted ultrasonic deaggregation (SAUD) by employing NaHCO3 (a milling agent with relatively low solubility) followed by dialysis (a purification step) and processed two DND and one laser-synthesized (LND) commercial powders. The obtained ND colloids were separated to single-digit supernatant with the yield of 57-65% and sediment fractions by centrifugation and analysed separately. By thermal analysis we evidenced chemical sensitization of the SAUD-processed DNDs manifested by significantly lower combustion temperatures. By correlation of spectroscopic, microscopic, and thermal analysis techniques we revealed a size and shape inhomogeneity of primary DND particles, also affecting strength of aggregation. By elemental analysis of the fractions we also show that nitrogen content is systematically higher in the smaller primary DND particles. Those features are inherent to all the three ND samples.
Permanent Link: http://hdl.handle.net/11104/0319266