Электронный каталог

Статья

Savilov, S.V.
Influence of Content and Type of Lanthanide on the Structure of Ln&sub(2)O&sub(3)-Covered Carbon Nanoflakes: the EPR and XPS Study / S.V.Savilov, G.A.Chelkov, [a.o.]. – Text : electronic // Nanomaterials. – 2025. – Vol. 15, No. 13. – P. 1016. – URL: https://doi.org/10.3390/nano15131016. – Bibliogr.: 57.

Synthesized Ln&sub(2)O&sub(3) (Ln = La, Nd or Gd) nanoparticles with sizes of 1–3 nm, 5–6 nm and 10–15 nm were stabilized by carbon nanoflakes (CNFs). The weight content of Ln&sub(2)O&sub(3) in the Ln&sub(2)O&sub(3)/CNF composites was 20–50 wt. %, which makes these composites potentially suitable for practical use as computed tomography and magnetic resonance imaging contrast agents. The structure of CNFs and Ln&sub(2)O&sub(3)/CNF composites was investigated by X-ray diffraction data, X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR). The EPR spectra of raw CNFs were silent. The oxidation of the CNF surface resulted in the appearance of paramagnetic centers associated with two types of unpaired electrons in the carbon support. After impregnation of the CNFs with the Ln&sub(3+) ion solution, the number of unpaired electrons was reduced, presumably due to the formation of C–O–Ln bonds. All Ln&sub(3+) ions changed the composites’ EPR spectra by reducing the number of unpaired electrons in the CNF structure.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 33 а - Нанофизика. Нанотехнология$
Спец.(статьи,препринты) = С 332.8 - Синхротронное излучение. Лазеры на свободных электронах. Получение и использование рентгеновских лучей
Бюллетени = 33/025