Electrical and colloidal properties of hydrogenated nanodiamonds: Effects of structure, composition and size

0585214 - FZÚ 2025 RIV NL eng J - Článek v odborném periodiku
Stehlík, Štěpán - Szabó, Ondrej - Shagieva, Ekaterina - Miliaieva, Daria - Kromka, Alexander - Němečková, Zuzana - Henych, Jiří - Kozempel, J. - Ekimov, E. - Rezek, B.
Electrical and colloidal properties of hydrogenated nanodiamonds: Effects of structure, composition and size.
Carbon Trends. Roč. 14, Mar (2024), č. článku 100327. E-ISSN 2667-0569
Grant CEP: GA MŠMT(CZ) LM2023066
Výzkumná infrastruktura: CzechNanoLab II - 90251
Institucionální podpora: RVO:68378271 ; RVO:61388980
Klíčová slova: nanodiamond * hydrogenation * positive zeta potential * conductivity * FTIR
Obor OECD: Nano-materials (production and properties); Inorganic and nuclear chemistry (UACH-T)
Způsob publikování: Open access

This study shows how the ND synthesis process and ND size are reflected in their different colloidal/hydration and electronic properties. We employ three different ND types: detonation ND (DND), topdown high-pressure high-temperature ND (TD_HPHT ND) prepared by milling of HPHT monocrystals, and bottom-up high-pressure high-temperature ND (BU_HPHT ND) prepared by HPHT synthesis from chloroadamantane. Zeta potential measurements and Fourier transform infrared spectroscopy analysis (FTIR) reveal the best colloidal stability in neutral to basic pH and the strongest affinity to water for DND. Electrical and FTIR measurements connected with an annealing treatment show a steep increase of electrical conductivity in BU_HPHT ND above 2 nm and reveal different contribution of transfer doping in BU_HPHT ND and TD_HPHT ND despite similar conductivity values. We also confirm the correlation of the ND conductivity with IR transmission at the phonon frequency of the diamond.
Trvalý link: https://hdl.handle.net/11104/0352975