Milled Nanodiamonds Overproduce Solvated Electrons while Scavenging Hydroxyl Radicals under Gamma Irradiation
Florent Ducrozet, Émilie Brun, Hugues A. Girard, Jean‐Charles Arnault, Cécile Sicard‐Roselli
Abstract
Among the different nanodiamonds, milled nanodiamonds (MNDs) from high-pressure high-temperature synthesis exhibit a crystalline quality close to that of the bulk diamond, making it a serious candidate for quantum or energy-related fields. In this study, MND aqueous suspensions with oxidized (MND-Ox) and hydrogenated (MND-H) surface chemistries were irradiated with gamma-rays. Using optimized nanoparticle-compatible methods, we revealed that MNDs in suspension enhance the production of solvated electrons under irradiation, with a higher yield for MND-H. Also, for the first time, a surface-chemistry-dependent scavenging effect of hydroxyl radicals was highlighted for this type of nanodiamonds.