Reading the charge state of hydrogenated nanodiamonds: the 1330 cm-1 Fano feature as an interfacial probe
- 1Institute of Physics
- 2Czech Academy of Sciences
Abstract
Hydrogenated nanodiamonds combine unusual electrokinetic charging with electronic properties that are highly sensitive to their surrounding environment, yet the relationship between molecular adsorption, interfacial charge and carrier state remains poorly understood. Here, a homologous series of anionic and cationic surfactants with C3–C16 alkyl chains is used as a controlled molecular perturbation of oxidized and hydrogenated detonation (DND) and high-pressure high-temperature (HPHT) nanodiamonds. By combining ζ-potential measurements, FTIR spectroscopy and electrical transport, we examine how surfactant polarity and chain length affect these chemically and structurally distinct interfaces. Particular attention is given to the ~1330 cm-1 Fano-type infrared feature of HPHT H-ND, which we establish here as a spectroscopic probe of changes in its interfacial electronic state. The comparison reveals a marked contrast between the comparatively electrostatically hard H-DND interface and the electronically responsive HPHT H-ND surface, where molecular interactions can substantially modify the charge-transfer state. More broadly, the results show that molecular adsorption, electrokinetic charge and electronic carrier response need not evolve in parallel, supporting the Fano-type feature as a sensitive readout of molecularly regulated hydrogenated nanodiamond interfaces.
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BibTeX
@misc{sharma2026reading,
title = {{Reading the charge state of hydrogenated nanodiamonds: the 1330 cm-1 Fano feature as an interfacial probe}},
author = {Neha Sharma and Ondrej Szabo and Katerina Kolarova and Stepan Stehlik},
howpublished = {ChemRxiv},
year = {2026},
month = sep,
doi = {10.26434/chemrxiv.15009575/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009575/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Reading the charge state of hydrogenated nanodiamonds: the 1330 cm-1 Fano feature as an interfacial probe
AU - Neha Sharma
AU - Ondrej Szabo
AU - Katerina Kolarova
AU - Stepan Stehlik
PY - 2026
DA - 2026/09/28
PB - ChemRxiv
DO - 10.26434/chemrxiv.15009575/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009575/v1
AB - Hydrogenated nanodiamonds combine unusual electrokinetic charging with electronic properties that are highly sensitive to their surrounding environment, yet the relationship between molecular adsorption, interfacial charge and carrier state remains poorly understood. Here, a homologous series of anionic and cationic surfactants with C3–C16 alkyl chains is used as a controlled molecular perturbation of oxidized and hydrogenated detonation (DND) and high-pressure high-temperature (HPHT) nanodiamonds. By combining ζ-potential measurements, FTIR spectroscopy and electrical transport, we examine how surfactant polarity and chain length affect these chemically and structurally distinct interfaces. Particular attention is given to the ~1330 cm-1 Fano-type infrared feature of HPHT H-ND, which we establish here as a spectroscopic probe of changes in its interfacial electronic state. The comparison reveals a marked contrast between the comparatively electrostatically hard H-DND interface and the electronically responsive HPHT H-ND surface, where molecular interactions can substantially modify the charge-transfer state. More broadly, the results show that molecular adsorption, electrokinetic charge and electronic carrier response need not evolve in parallel, supporting the Fano-type feature as a sensitive readout of molecularly regulated hydrogenated nanodiamond interfaces.
ER -