Синтез гибридных золотосодержащих наночастиц CuFe2O4/Au и CuO/Au с использованием метода анионообменного осаждения

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Гибридные наночастицы на основе оксидов цветных металлов и золота вызывают интерес с точки зрения их применения в катализе и в биомедицине, в частности для проведения магнитной гипертермии и адресной доставки лекарственных препаратов. В данной работе описаны методы получения оксидных ядер (CuO, CuFe2O4) и гибридных наночастиц (CuO/Au, CuFe2O4/Au), поверхность которых покрыта нанокластерами золота размером ~2 нм. Гибридные наночастицы были синтезированы с использованием аминокислоты – L-метионина, выполняющей функции восстановителя и “якоря” между оксидным ядром и золотыми кластерами. Предложенный в работе метод получения оксидных ядер СuO и CuFe2O4 – анионообменное осаждение – является простым, быстрым и легко воспроизводимым в обычных лабораторных условиях. Показано, что в ходе анионообменного осаждения Сu2+ без полисахарида формируются наночастицы оксида меди(II) вытянутой формы длиной 85 ± 3 нм и толщиной 15.1 ± 0.3 нм, а при анионообменном осаждении Cu2+ и Fe3+ в присутствии полисахарида (декстрана-40) и при последующей температурной обработке (850°С) прекурсора стехиометрического состава формируются наночастицы феррита меди с размером 18.3 ± 0.4 нм. Оценка биосовместимости всех синтезированных материалов (СuO, CuFe2O4, CuO/Au, CuFe2O4/Au) на тест-микроорганизмах Escherichia coli, Bacillus subtilis показала, что наличие золота на поверхности наночастиц повышает их биосовместимость и делает подходящими для использования в биомедицинских целях.

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Sobre autores

А. Павликов

Сибирский федеральный университет

Autor responsável pela correspondência
Email: apavlikov98@mail.ru
Rússia, Свободный пр., 79, Красноярск, 660041

С. Сайкова

Сибирский федеральный университет; Институт химии и химической технологии Сибирского отделения Российской академии наук – обособленное подразделение Красноярского научного центра Сибирского отделения Российской академии наук

Email: apavlikov98@mail.ru
Rússia, Свободный пр., 79, Красноярск, 660041; Академгородок, 50/24, Красноярск, 660036

Д. Карпов

Сибирский федеральный университет; Институт химии и химической технологии Сибирского отделения Российской академии наук – обособленное подразделение Красноярского научного центра Сибирского отделения Российской академии наук

Email: apavlikov98@mail.ru
Rússia, Свободный пр., 79, Красноярск, 660041; Академгородок, 50/24, Красноярск, 660036

А. Самойло

Сибирский федеральный университет

Email: apavlikov98@mail.ru
Rússia, Свободный пр., 79, Красноярск, 660041

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2. Fig. 1. SEM image (a), electron microdiffraction (b), and size distribution diagrams of CuFe2O4 NPs (c).

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3. Fig. 2. X-ray radiographs of CuFe2O4 (a) and CuO (b) (black lines), the results of Rietveld profile refinement (red lines) and the difference curve (light grey lines).

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4. Fig. 3. SEM image (a), electron microdiffraction (b), as well as diagrams of CuO NA distribution along the length (c) and thickness (d).

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5. Fig. 4. Overview XRD spectrum (a), XRD spectra of S 2p (b) and Au 4f (c) of CuFe2O4/Au NAs.

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6. Fig. 5. SEM images (a, c, e) and electron microdiffraction patterns (b, d, f) of CuFe2O4/Au (a, b) and CuO/Au wafers without CuO calcination (c, d) and after CuO calcination (e, f).

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7. Fig. 6. EDRS of CuO/Au LFs without CuO calcination (a) and after CuO calcination (b).

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8. Fig. 7. X-ray radiographs of CuFe2O4/Au (a) and CuO/Au without CuO calcination (b), after CuO calcination (c), as well as the results of Rietveld profile refinement (red lines) and the difference curve (light grey lines).

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9. Fig. 8. Growth inhibition zones of test cultures of B. subtilis (a-e) and E. coli (e-k) by CuFe2O4 (a, f), CuFe2O4/Au (b, g), CuO (c, h), CuO/Au (d, i) and CuO (e, k) after calcination: 1 - 100, 2 - 50, 3 - 25, 4 - 12.5 mg/ml.

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10. Fig. 9. Antibacterial activity of CuFe2O4, CuFe2O4/Au, CuO, CuO/Au and CuO nanoparticles (after calcination) on test cultures of B. subtilis and E. coli.

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