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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">techusgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета. Серия: Техника и технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University. Series: Engineering and Technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1528</issn><publisher><publisher-name>Юго-Западный государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21869/2223-1528-2024-14-3-105-119</article-id><article-id custom-type="elpub" pub-id-type="custom">techusgu-265</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Моделирование отклика магнитной полимеросомы в неоднородном магнитном поле</article-title><trans-title-group xml:lang="en"><trans-title>Simulation of the response of a magnetic polymersome  in an inhomogeneous magnetic field</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4584-1113</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыжков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryzhkov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рыжков Александр Владимирович, кандидат физико-математических наук, научный  сотрудник</p><p>ул. Акад. Королева, д. 1, г. Пермь 614013</p><p>Researcher ID: D-6534-2015 </p></bio><bio xml:lang="en"><p>Aleksandr V. Ryzhkov, Candidate of Sciences (Physics and Mathematics), Researcher</p><p>1 Akademika Koroleva Str., Perm 614013</p><p>Researcher ID: D-6534-2015 </p></bio><email xlink:type="simple">ryzhkov.a@icmm.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт механики сплошных сред Уральского отделения Российской академии наук –    филиал Федерального государственного бюджетного учреждения науки Пермского федерального    исследовательского центра Уральского отделения Российской академии наук</institution></aff><aff xml:lang="en"><institution>Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>24</day><month>09</month><year>2024</year></pub-date><volume>14</volume><issue>3</issue><fpage>105</fpage><lpage>119</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рыжков А.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Рыжков А.В.</copyright-holder><copyright-holder xml:lang="en">Ryzhkov A.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://techusgu.elpub.ru/jour/article/view/265">https://techusgu.elpub.ru/jour/article/view/265</self-uri><abstract><sec><title>Цель</title><p>Цель. Выявить особенности поведения магнитной полимеросомы, помещенной в неоднородное поле точечного диполя, с помощью моделирования методом крупнозернистой молекулярной динамики.</p></sec><sec><title>Методы</title><p>Методы. Исследуемая система представляется в виде набора взаимодействующих частиц двух типов: полимерные частицы, имитирующие двойной слой амфифильной мембраны, и магнитные наночастицы, расположенные в мембранном слое. Полимерные частицы взаимодействуют посредством упругих потенциалов, призванных сохранять равновесную сферическую везикулярную геометрию. Магнитные наночастицы взаимодействуют между собой и внешними полями как точечные диполи. Исключенный объем и стерическое взаимодействие магнитных частиц с полимерными стенками моделируется в форме мягкого отталкивания. Вся система находится в изотермических условиях, и модельные параметры выбраны в соответствии с типичными энергиями взаимодействий относительно тепловых колебаний. Рассматривается модельная полимеросома диаметра около 100 нм в водном растворе при 25°C. Неоднородное магнитное поле создается расположенным на фиксированном расстоянии диполе неизменного направления. Динамика системы отслеживается численным интегрированием уравнений движения частиц с введенными взаимодействиями и наложенными условиями.</p></sec><sec><title>Результаты</title><p>Результаты. В численных экспериментах получен ответ полимеросомы на магнитное поле для трех значений параметра, описывающего неоднородность поля. Рассмотрена задача при постепенном росте напряженности (и ее градиента) магнитного поля вблизи полимеросомы. Показано изменение намагниченности системы, проанализировано перераспределение концентрации наночастиц. Проведено моделирование ситуации, когда центр полимеросомы в начальный момент времени помещен в точку с фиксированным значением магнитного поля для трех случаев неоднородности поля. Обнаружена значительная перестройка магнитного слоя везикулы, совмещенная с перемещением всей капсулы. По смещению объекта сделаны оценки о развиваемой средней скорости.</p></sec><sec><title>Заключение</title><p>Заключение. Модель позволяет оценить особенности комбинированного магнитного, структурного и механического отклика полимеросомы на неоднородное поле в канве потенциальных приложений для управляемой доставки содержимого внутрь клеток.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose</title><p>Purpose. Identification of the behavior of a magnetic polymersome placed in an inhomogeneous field of a point dipole using coarse-grained molecular dynamics simulations.</p></sec><sec><title>Methods</title><p>Methods. The system under the study is represented as a set of interacting particles of two types: polymeric particles simulating a double layer of an amphiphilic membrane, and magnetic nanoparticles located in the membrane layer. Polymeric particles interact through elastic potentials designed to maintain an equilibrium spherical vesicular geometry. Magnetic nanoparticles interact with each other and external fields as point dipoles. The excluded volume and steric interaction of magnetic particles with polymeric walls are modeled in the form of soft repulsion. The entire system is under isothermal conditions, and the model parameters are chosen according to typical interaction energies relative to thermal fluctuations. A model polymersome with a diameter of about 100 nm in an aqueous solution at 25°C is considered. An inhomogeneous magnetic field is created by a dipole of constant direction located at a fixed distance. The dynamics of the system is monitored by numerical solution of the equations of particles motion with introduced interactions and imposed conditions.</p></sec><sec><title>Results</title><p>Results. In numerical experiments, the response of the polymersome to a magnetic field was obtained for three values of the parameter describing the inhomogeneity of the field. The problem with a gradual increase in the strength (and its gradient) of the magnetic field near the polymersome is considered. Changes in the magnetization of the system are shown, and the redistribution of the concentration of nanoparticles is analyzed. A simulation of the situation when the center of the polymersome at the initial moment was placed at a point with a fixed value of the magnetic field for three cases of inhomogeneity of the field was carried out. A significant restructuring of the magnetic layer of the vesicle combined with movement of the entire capsule was detected. Estimates are made about the average velocity based on the displacement of the object.</p></sec><sec><title>Conclusion</title><p>Conclusion. The model allows to evaluate the features of the combined magnetic, structural and mechanical response of the polymersome to an inhomogeneous field in the context of potential applications for controlled delivery of contents into cells.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>магнитная полимеросома</kwd><kwd>магнитная везикула</kwd><kwd>магнитные наночастицы</kwd><kwd>мягкое магнитное вещество</kwd><kwd>доставка лекарств</kwd><kwd>молекулярная динамика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic polymersome</kwd><kwd>magnetic vesicle</kwd><kwd>magnetic nanoparticles</kwd><kwd>magnetic soft matter</kwd><kwd>drug delivery</kwd><kwd>molecular dynamics</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания, номер регистрации темы:  АААА-А20-120020690030-5.</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of a state assignment, topic registration number: АААА-А20120020690030-5</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Polymersomes: tough vesicles made from diblock copolymers / B. 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