najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2023-14-3-334-341najo-310Research ArticlePHYSICSФИЗИКАAgglomeration of magnetite nanoparticles with citrate shell in an aqueous magnetic fluidАгломерация наночастиц магнетита с цитратной оболочкой в водной магнитной жидкостиhttps://orcid.org/0000-0002-6707-6216ПлешаковИ. В.PleshakovI. V.

Ivan V. Pleshakov

26 Politechnicheskaya str., St. Petersburg, 194021

ivanple@yandex.ruhttps://orcid.org/0000-0002-0546-1805РыжовВ. А.RyzhovV. A.

Vyacheslav A. Ryzhov

Gatchina, 188300

varyzhov@yandex.ruhttps://orcid.org/0000-0002-7923-2175МарченкоЯ. Я.MarchenkoYa. Yu.

Yaroslav Yu. Marchenko

Gatchina, 188300

046_slava@mail.ruhttps://orcid.org/0009-0000-5368-6788АлексеевА. А.AlekseevA. A.

Arseniy A. Alekseev

29 Polytechnicheskaya str., St. Petersburg, 195251

arseniy.alekseev98@gmail.comhttps://orcid.org/0000-0002-4416-9380КарсееваЭ. К.KarseevaE. K.

Elina K. Karseeva

29 Polytechnicheskaya str., St. Petersburg, 195251

elina.nep@gmail.comhttps://orcid.org/0000-0002-7661-9155НеведомскийВ. Н.NevedomskiyV. N.

Vladimir N. Nevedomskiy

26 Politechnicheskaya str., St. Petersburg, 194021

nevedom@mail.ioffe.ruhttps://orcid.org/0009-0009-7894-1947ПрокофьевА. В.Prokof’evA. V.

Andrey V. Prokof’ev

26 Politechnicheskaya str., St. Petersburg, 194021

andrey.prokofyev@algo-spb.comIoffe InstituteRussian FederationPetersburg Nuclear Physics Institute named by B. P. Konstantinov of National Research Centre “Kurchatov Institute”Russian FederationPeter the Great St. Petersburg Polytechnic UniversityRussian Federation202330062025143334341Copyright © Pleshakov I.V., Ryzhov V.A., Marchenko Y.Y., Alekseev A.A., Karseeva E.K., Nevedomskiy V.N., Prokof’ev A.V., 20252025Плешаков И.В., Рыжов В.А., Марченко Я.Я., Алексеев А.А., Карсеева Э.К., Неведомский В.Н., Прокофьев А.В.Pleshakov I.V., Ryzhov V.A., Marchenko Y.Y., Alekseev A.A., Karseeva E.K., Nevedomskiy V.N., Prokof’ev A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/310

In this work, the aggregation of nanoparticles in an aqueous colloidal solution of magnetite, stabilized by creating a citrate shell on the particle surface is studied. Electron microscopy and laser correlation spectroscopy were used as experimental methods. Optical measurements were carried out both at zero external magnetic field and in the fields differently oriented relative to the probing laser beam. It is shown that the samples tend to form large aggregates even without the application of the field, and in the case of its presence the behavior of these structures has features that distinguish them from other magnetic fluids.

В данной работе изучается агрегация наночастиц в водном коллоидном растворе магнетита, стабилизированном путем создания цитратной оболочки на поверхности частиц. В качестве экспериментальных методов использовались электронная микроскопия и лазерная корреляционная спектроскопия. Оптические измерения проводились как при нулевом внешнем магнитном поле, так и в полях, по-разному ориентированных относительно зондирующего лазерного луча. Показано, что образцы имеют тенденцию образовывать крупные агрегаты даже без приложения поля, а в случае его присутствия поведение этих структур имеет особенности, отличающие их от других магнитных жидкостей.

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The authors declare that there are no conflicts of interest present.