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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">10.17586/2220-8054-2018-9-6-783-788</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-861</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>CHEMISTRY AND MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>Spectral-kinetic properties of LaF3 nanoparticles doped with Ce3+ and Sm3+ ions after microwave treatment and in core-shell structure</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Madirov</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><email xlink:type="simple">ed.madirov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Lukinova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Nizamutdinov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Pudovkin</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Korableva</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Semashko</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>18, Kremlevskaja str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="en">Kazan Federal University, Institute of Physics<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>14</day><month>08</month><year>2025</year></pub-date><volume>9</volume><issue>6</issue><elocation-id>783–788</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Madirov E.I., Lukinova E.V., Nizamutdinov A.S., Pudovkin M.S., Korableva S.L., Semashko V.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Madirov E.I., Lukinova E.V., Nizamutdinov A.S., Pudovkin M.S., Korableva S.L., Semashko V.V.</copyright-holder><copyright-holder xml:lang="en">Madirov E.I., Lukinova E.V., Nizamutdinov A.S., Pudovkin M.S., Korableva S.L., Semashko V.V.</copyright-holder><license 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/861">https://nanojournal.ifmo.ru/jour/article/view/861</self-uri><abstract><p>Crystalline LaF3:Sm3+ and LaF3:Ce3+ nanoparticles were fabricated via a co-precipitation method. The obtained nanoparticles were 15 – 20 nm and had good crystallinity. Spectral-kinetic properties of crystalline LaF3 nanoparticles activated with 5 % Sm3+ and 12 % Ce3+ ions were studied. Various duration of the microwave treatment as well as core-shell structure were studied as possible ways to control quenching in the nanoparticles. In case of the LaF3:Sm3+ nanoparticles, the additional microwave treatment increased the average luminescence lifetime by 6 % and addition of the LaF3 shell increased it by 18 %. In case of the LaF3:Ce3+ sample, microwave treatment increased the average lifetime by up to 20 %. The observed effects of varying the synthetic conditions and composite core-shell structure on luminescence properties of nanoparticles provide a means to manage the energy loss in the nanoparticles due to the quenching factors.</p></abstract><kwd-group xml:lang="en"><kwd>nanoparticle</kwd><kwd>rare-earth ions</kwd><kwd>fluoride</kwd><kwd>samarium</kwd><kwd>cerium</kwd></kwd-group><funding-group xml:lang="en"><funding-statement>Studies were carried out in the frame of the state assignment in the sphere of scientific activities (Projects No. 3.1156.2017/4.6 and No. 3.5835.2017/6.7). Authors are grateful to specialists of Interdisciplinary Center of Analytical Microscopy of Kazan Federal University for microscopy studies.</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">Kuznetsov S.V., Morozov O.A., et al. 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