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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">10.17586/2220-8054-2025-16-4-419-426</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-1432</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>Magnetically dependent photoluminescence of tetracene nanoparticles</article-title><trans-title-group xml:lang="ru"><trans-title>Магнито-зависимая фотолюминесценция нанокристаллов тетрацена</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8821-2427</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кучеренко</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kucherenko</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Оренбург 460018, Россия</p></bio><bio xml:lang="en"><p>Michael G. Kucherenko</p><p>Orenburg 460018, Russia </p></bio><email xlink:type="simple">clibph@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/0000-0002-8871-1012</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пеньков</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Penkov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Оренбург 460018, Россия</p></bio><bio xml:lang="en"><p>Sergey A. Penkov </p><p>Orenburg 460018, Russia </p><p> </p></bio><email xlink:type="simple">sapenkov.sci@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Оренбургский государственный университет, Центр лазерной и информационной биофизики</institution></aff><aff xml:lang="en"><institution>Orenburg State University, Centre of Laser and Information Biophysics</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>03</day><month>09</month><year>2025</year></pub-date><volume>16</volume><issue>4</issue><fpage>419</fpage><lpage>426</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kucherenko M.G., Penkov S.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кучеренко М.Г., Пеньков С.А.</copyright-holder><copyright-holder xml:lang="en">Kucherenko M.G., Penkov S.A.</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/1432">https://nanojournal.ifmo.ru/jour/article/view/1432</self-uri><abstract><p>Tetracene nanocrystals prepared by the reprecipitation method are investigated using magnetophotoluminescence, steady-state optical absorption and emission spectroscopies. The steady-state absorption spectra indicate that the tetracene nanoparticles possess a crystalline structure. The magnetic field dependence of photoluminescence for tetracene nanoparticles has a range almost 40 times smaller than that for tetracene macrocrystals. This result is interpreted within the framework of a theoretical model based on the solution of the diffusion equation for a restricted spherical volume. The calculations show that this decrease in magnetic field dependences of photoluminescence can be sensitive to the size of tetracene crystals. According to the theoretical model, the triplet-triplet annihilation rate increases in nanostructured tetracene.</p></abstract><trans-abstract xml:lang="ru"><p>Нанокристаллы тетрацена, полученные методом переосаждения, исследованы с использованием методов стационарного оптического поглощения и люминесценции, а также методом магниточувствительной фотолюминесценции. Спектры стационарного поглощения указывают на то, что наночастицы тетрацена обладают кристаллической структурой. Зависимость фотолюминесценции от магнитного поля для наночастиц тетрацена почти в 40 раз слабее, чем для макрокристаллов тетрацена. Этот результат интерпретируется в рамках теоретической модели, основанной на решении уравнения диффузии для ограниченного сферического объема. Расчеты зависимости фотолюминесценции от магнитного поля на основе теоретической модели показывают, что уменьшение магнитного эффекта зависит от размера сферического объема. Согласно теоретической модели, это уменьшение может быть связано с увеличением скорости триплет-триплетной аннигиляции в ограниченном нанообъеме.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нанокристаллы тетрацена</kwd><kwd>расщепление синглетного экситона на два триплетных</kwd><kwd>триплет-триплетная аннигиляция</kwd><kwd>магнито-зависимая фотолюминесценция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tetracene nanocrystals</kwd><kwd>singlet fission</kwd><kwd>triplet-triplet annihilation</kwd><kwd>magnetically dependent photoluminescence</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The authors express their gratitude to the Ministry of Science and Higher Education of the Russian Federation for funding [Grant No. FSGU-2023-0003, Grant No. 075-15-2024-550]. 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