Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.21883/PSS.2022.14.54331.147
Ключевые слова: pulsed laser ablation, nanoparticles, colloidal solutions, magnetite, magnetic circular dichroism
Аннотация: The structure, optical and magneto-optical properties of colloidal solutions of iron oxide nanoparticles obtained by pulsed ablation in distilled water, both without additives and with various functional additives: gold-hydrochloric acid, silicon oxide, and polyvinylpyrrolidone, have been studied. It is shown that the main magneticПоказать полностьюphase is magnetite Fe3O4. The size distribution of nanoparticles and the degree of their agglomeration depend on the additives. In the absence of the latter, a very wide of size distributions and strong agglomeration of particles are observed. The narrowest distribution curve with a maximum corresponding to ~ 7 nm and an almost complete absence of agglomeration are observed for particles synthesized in the presence of polyvinylpyrrolidone. The shape of the spectral dependence of magnetic circular dichroism, which generally corresponds to the spectrum of magnetite, undergoes some modifications for various additives, which is associated with defects in the distribution of iron ions between different positions in the crystal.
Журнал: Physics of the Solid State
Выпуск журнала: Т.64, №14
Номера страниц: 2334-2341
ISSN журнала: 10637834
Место издания: Санкт-Петербург
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)