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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">10.17586/2220-8054-2021-12-2-218-223</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-368</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>NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>НАНОСИСТЕМЫ: ФИЗИКА, ХИМИЯ, МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>Study of stability of luminescence intensity of β-NaGdF4:Yb:Er nanoparticle colloids in aqueous solution</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование стабильности интенсивности люминесценции коллоидов наночастиц β-NaGdF4:Yb:Er в водном растворе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Kormshchikov</surname><given-names>I. D.</given-names></name><name name-style="western" xml:lang="en"><surname>Kormshchikov</surname><given-names>I. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Faculty of Chemistry, Moscow State University</p><p>Vavilov str, 38, Moscow, 119991 ,</p><p>Moscow, 119991 </p></bio><bio xml:lang="en"><p>Faculty of Chemistry, Moscow State University</p><p>Vavilov str, 38, Moscow, 119991 ,</p><p>Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Voronov</surname><given-names>V. V.</given-names></name><name name-style="western" xml:lang="en"><surname>Voronov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Vavilov str, 38, Moscow, 119991 </p></bio><bio xml:lang="en"><p>Vavilov str, 38, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Burikov</surname><given-names>S. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Burikov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Faculty of Physics</p><p>Moscow, 119991</p></bio><bio xml:lang="en"><p>Faculty of Physics</p><p>Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Dolenko</surname><given-names>T. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Dolenko</surname><given-names>T. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Faculty of Physics</p><p>Moscow, 119991 </p></bio><bio xml:lang="en"><p>Faculty of Physics</p><p>Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Kuznetsov</surname><given-names>S. V.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Vavilov str, 38, Moscow, 119991 </p></bio><bio xml:lang="en"><p>Vavilov str, 38, Moscow, 119991</p></bio><email xlink:type="simple">kouznetzovsv@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences;&#13;
Moscow State University</institution></aff><aff xml:lang="en"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences;&#13;
Moscow State University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Prokhorov General Physics Institute of the Russian Academy of Science</institution></aff><aff xml:lang="en"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Moscow State University</institution></aff><aff xml:lang="en"><institution>Moscow State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>28</day><month>07</month><year>2025</year></pub-date><volume>12</volume><issue>2</issue><fpage>218</fpage><lpage>223</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kormshchikov I.D., Voronov V.V., Burikov S.A., Dolenko T.А., Kuznetsov S.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Kormshchikov I.D., Voronov V.V., Burikov S.А., Dolenko T.А., Kuznetsov S.V.</copyright-holder><copyright-holder xml:lang="en">Kormshchikov I.D., Voronov V.V., Burikov S.A., Dolenko T.А., Kuznetsov S.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/368">https://nanojournal.ifmo.ru/jour/article/view/368</self-uri><abstract><p>Hexagonal modification e—NaGdF4:Yb:Er with a particle size of 24 nm was synthesized by the solvothermal technique. Concentrated aqueous colloids of nanoparticles were prepared using polyvinylpyrrolidone as the surfactant. The study of the luminescence characteristics for 25 days revealed that the luminescence intensity did not significantly change and hydrolysis of nanoparticles was not observed.</p></abstract><trans-abstract xml:lang="ru"><p>Сольвотермическим методом синтезирована гексагональная модификация β-NaGdF4:Yb:Er с размером частиц 24 нм. Концентрированные водные коллоиды наночастиц готовили с использованием поливинилпирролидона в качестве поверхностно-активного вещества. Изучение характеристик люминесценции в течение 25 сут показало, что интенсивность люминесценции существенно не изменилась и гидролиза наночастиц не наблюдалось.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нанофторид</kwd><kwd>ап-конверсионная люминесценция</kwd><kwd>стабильность люминесценции водного коллоида</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanofluoride</kwd><kwd>up-conversion luminescence</kwd><kwd>luminescence stability of the aqueous colloid</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">Wolfbeis O.S. An overwiew of nanoparticles commonly used in fluorescent bioimaging. Chem. Soc. Rev., 2015, 44, P. 4743–4768.</mixed-citation><mixed-citation xml:lang="en">Wolfbeis O.S. An overwiew of nanoparticles commonly used in fluorescent bioimaging. Chem. Soc. 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