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Updated: Mar 9, 2026

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Hydroxyl radical production induced by plasma hydrogenated nanodiamonds under X-ray irradiation
Magdalena Kurzyp1, Hugues A Girard1, Yannis Cheref2
1CEA, LIST, Diamond Sensors Laboratory, F-91191 Gif-sur-Yvette, France. magdalena.kurzyp@cea.fr jean-charles.arnault@cea.fr.
Abstract:
For the first time, overproduction of hydroxyl radicals (HO˙) induced by plasma hydrogenated detonation nanodiamonds (H-NDs) under X-ray irradiation is reported. Using coumarin (COU) as a fluorescent probe, we reveal a significant increase of 40% of the HO˙ production in the presence of H-NDs (6-100 μg ml-1) compared with water alone. This effect is related to the negative electron affinity of the hydrogenated nanodiamonds and illustrates the ability of H-NDs to produce reactive oxygen species probably via electron emission in water under X-ray irradiation.
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