Babunts, Roman A.Uspenskaya, Yulia A.Romanov, Nikolai G.Orlinskii, Sergei B.Mamin, Georgy V.Shornikova, Elena V.Yakovlev, Dmitri R.Bayer, M.Işık, FurkanShendre, S.Delikanlı, SavaşDemir, Hilmi Volkan2024-03-202024-03-202023-02-201936-0851https://hdl.handle.net/11693/115016Semiconductor colloidal nanoplatelets based of CdSe have excellent optical properties. Their magneto-optical and spin-dependent properties can be greatly modified by implementing magnetic Mn2+ ions, using concepts well established for diluted magnetic semiconductors. A variety of magnetic resonance techniques based on high-frequency (94 GHz) electron paramagnetic resonance in continuous wave and pulsed mode were used to get detailed information on the spin structure and spin dynamics of Mn2+ ions in core/shell CdSe/(Cd,Mn)S nanoplatelets. We observed two sets of resonances assigned to the Mn2+ ions inside the shell and at the nanoplatelet surface. The surface Mn demonstrates a considerably longer spin dynamics than the inner Mn due to lower amount of surrounding Mn2+ ions. The interaction between surface Mn2+ ions and 1H nuclei belonging to oleic acid ligands is measured by means of electron nuclear double resonance. This allowed us to estimate the distances between the Mn2+ ions and 1H nuclei, which equal to 0.31 ± 0.04, 0.44 ± 0.09, and more than 0.53 nm. This study shows that the Mn2+ ions can serve as atomic-size probes for studying the ligand attachment to the nanoplatelet surface.en-USCC BY-NC-ND 4.0 Deed (Attribution-NonCommercial-NoDerivs 4.0 International)https://creativecommons.org/licenses/by-nc-nd/4.0/Colloidal nanocrystalsCdSe nanoplateletsDiluted magnetic semiconductorsElectron paramagnetic resonanceElectron nuclear double resonanceArticle10.1021/acsnano.2c101231936-086X