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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2024-15-3-346-351</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-99</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="en"><subject>PHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group></article-categories><title-group><article-title>Effect of laser radiation on magnetite nanoparticles in deposited ferrofluid</article-title><trans-title-group xml:lang="ru"><trans-title>Действие лазерного излучения на наночастицы магнетита в осаждаемой феррожидкости</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6707-6216</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плешаков</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pleshakov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194021; Политехническая, 26; Санкт-Петербург</p></bio><bio xml:lang="en"><p>Ivan V. Pleshakov</p><p>194021; Politechnicheskaya 26; St. Petersburg</p></bio><email xlink:type="simple">ivanple@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-5368-6788</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Alekseev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>195251; Политехническая, 29; Санкт-Петербург</p></bio><bio xml:lang="en"><p>Arseniy A. Alekseev</p><p>195251; Politechnicheskaya 29; St. Petersburg</p></bio><email xlink:type="simple">arseniy.alekseev98@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4063-2697</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бибик</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Bibik</surname><given-names>E. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>190013; Московский пр., 26; Санкт-Петербург</p></bio><bio xml:lang="en"><p>Efim E. Bibik</p><p>190013; Moskovsky Ave., 26; St. Petersburg</p></bio><email xlink:type="simple">eefimovich@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7809-0630</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ильичев</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ilichev</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194021; Политехническая, 26; Санкт-Петербург</p></bio><bio xml:lang="en"><p>Igor V. Ilichev</p><p>194021; Politechnicheskaya 26; St. Petersburg</p></bio><email xlink:type="simple">iiv@mail.ioffe.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-7894-1947</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прокофьев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Prokof’ev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>194021; Политехническая, 26; Санкт-Петербург</p></bio><bio xml:lang="en"><p>Andrey V. Prokof’ev</p><p>194021; Politechnicheskaya 26; St. Petersburg</p></bio><email xlink:type="simple">Andrey.prokofyev@algo-spb.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Физико-технический институт имени А. Ф. Иоффе РАН</institution></aff><aff xml:lang="en"><institution>Ioffe Institute</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский политехнический университет Петра Великого</institution></aff><aff xml:lang="en"><institution>Peter the Great St. Petersburg Polytechnic University</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный технологический институт</institution></aff><aff xml:lang="en"><institution>St. Petersburg State Institute of Technology (Technical University)</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>01</day><month>06</month><year>2025</year></pub-date><volume>15</volume><issue>3</issue><fpage>346</fpage><lpage>351</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Pleshakov I.V., Alekseev A.A., Bibik E.E., Ilichev I.V., Prokof’ev A.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Плешаков И.В., Алексеев А.А., Бибик Е.Е., Ильичев И.В., Прокофьев А.В.</copyright-holder><copyright-holder xml:lang="en">Pleshakov I.V., Alekseev A.A., Bibik E.E., Ilichev I.V., Prokof’ev 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://nanojournal.ifmo.ru/jour/article/view/99">https://nanojournal.ifmo.ru/jour/article/view/99</self-uri><abstract><p>   The processes in a system of nanoparticles of a concentrated colloidal solution of magnetite induced by laser light with a wavelength of 650 µm have been studied. It was found that radiation focused on a drying drop of this substance, under certain conditions, leads to the formation of large accumulations of particles, in some cases strongly protruding above the surface of the sediment or, on the contrary, to their displacement from the illuminated area. A qualitative discussion of possible mechanisms of the observed phenomena is carried out.</p></abstract><trans-abstract xml:lang="ru"><p>   Исследованы процессы в системе наночастиц концентрированного коллоидного раствора магнетита, индуцированные лазерным излучением с длиной волны 650 мкм. Установлено, что излучение, сфокусированное на высыхающей капле этого вещества, при определенных условиях приводит к образованию больших скоплений частиц, в некоторых случаях сильно выступающих над поверхностью осадка или, наоборот, к их вытеснению из освещаемой области. Проводится качественное обсуждение возможных механизмов наблюдаемых явлений.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерный луч</kwd><kwd>оптическая сила</kwd><kwd>магнитная жидкость</kwd><kwd>феррожидкость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser beam</kwd><kwd>optical force</kwd><kwd>magnetic fluid</kwd><kwd>ferrofluid</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Socoliuc V., Avdeev M., Kuncser V., Turcu R., Tomb´acz E., Vekas L. Ferrofluids and bio-ferrofluids: looking back and stepping forward. Nanoscale, 2022, 14, P. 4786–4886.</mixed-citation><mixed-citation xml:lang="en">Socoliuc V., Avdeev M., Kuncser V., Turcu R., Tomb´acz E., Vekas L. Ferrofluids and bio-ferrofluids: looking back and stepping forward. 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