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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-2102</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Оптические свойства и параметр порядка жидкокристаллической p-n-ундецилоксибензойной кислоты, допированной наночастицами ZnO</article-title><trans-title-group xml:lang="en"><trans-title>Effect of ZnO Nanoparticles Dispersed in p-n-Undecyloxy Benzoic Acid Liquid Crystalline Compounds: Optical and Order Parameter Studies</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>Jayaprada</surname><given-names>P.</given-names></name><name name-style="western" xml:lang="en"><surname>Jayaprada</surname><given-names>P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виджаявада</p></bio><bio xml:lang="en"><p>Department of Physics</p><p>Vijayawada</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>Manepalli</surname><given-names>R.K. N.R.</given-names></name><name name-style="western" xml:lang="en"><surname>Manepalli</surname><given-names>R.K. N.R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Раджамандри</p></bio><bio xml:lang="en"><p>Department of Physics</p><p>Rajahmundry</p></bio><email xlink:type="simple">prof.mrnrao@andhrauniversity.edu.in</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Rao</surname><given-names>K. K.</given-names></name><name name-style="western" xml:lang="en"><surname>Rao</surname><given-names>K. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ситарампурам, Нарасапур</p></bio><bio xml:lang="en"><p>Department of Physics</p><p>Seetharampuram, Narasapur</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>Rao</surname><given-names>M. C.</given-names></name><name name-style="western" xml:lang="en"><surname>Rao</surname><given-names>M. C.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виджаявада</p></bio><bio xml:lang="en"><p>Department of Physics</p><p>Vijayawada</p></bio><email xlink:type="simple">raomc72@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Satyanarayana</surname><given-names>T.</given-names></name><name name-style="western" xml:lang="en"><surname>Satyanarayana</surname><given-names>T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Факультет физики</p><p>Милаварам</p></bio><bio xml:lang="en"><p>Division of Physics, Freshman Engineering Department</p><p>Mylavaram</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Subbareddy</surname><given-names>Y.</given-names></name><name name-style="western" xml:lang="en"><surname>Subbareddy</surname><given-names>Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Факультет химии</p><p>Милаварам</p></bio><bio xml:lang="en"><p>Division of Chemistry, Freshman Engineering Department</p><p>Mylavaram</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Rani</surname><given-names>N. U.</given-names></name><name name-style="western" xml:lang="en"><surname>Rani</surname><given-names>N. Usha</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виджаявада</p></bio><bio xml:lang="en"><p>Department of FED</p><p>Vijayawada</p></bio><xref ref-type="aff" rid="aff-6"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Koutavarapu</surname><given-names>R.</given-names></name><name name-style="western" xml:lang="en"><surname>Koutavarapu</surname><given-names>Ravindranadh</given-names></name></name-alternatives><bio xml:lang="ru"><p>Раджам, Андхра-Прадеш</p></bio><bio xml:lang="en"><p>Physics Division, Department of Basic Sciences and Humanities </p><p>Rajam, Andhra Pradesh</p></bio><xref ref-type="aff" rid="aff-7"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Kumar</surname><given-names>M. T.</given-names></name><name name-style="western" xml:lang="en"><surname>Kumar</surname><given-names>M. Tanooj</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кафедра CSE</p><p>Виджаявада</p></bio><bio xml:lang="en"><p>Department of CSE</p><p>Vijayawada</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Инженерно-технологический институт Дханекула</institution></aff><aff xml:lang="en"><institution>Dhanekula Institute of Engineering and Technology</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Государственный колледж</institution></aff><aff xml:lang="en"><institution>Government College</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Инженерно-технологический колледж Сварнандхра</institution></aff><aff xml:lang="en"><institution>Swarnandhra College of Engineering &amp; Technology</institution></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Колледж Андхра Лойола</institution></aff><aff xml:lang="en"><institution>Andhra Loyola College</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Инженерный колледж Лакиредди Бали Редди</institution></aff><aff xml:lang="en"><institution>Lakireddy Bali Reddy College of Engineering</institution></aff></aff-alternatives><aff-alternatives id="aff-6"><aff xml:lang="ru"><institution>Технологический институт Сиддхартхи</institution></aff><aff xml:lang="en"><institution>PVP Siddhartha Institute of Technology</institution></aff></aff-alternatives><aff-alternatives id="aff-7"><aff xml:lang="ru"><institution>Технологический институт GMR</institution></aff><aff xml:lang="en"><institution>GMR Institute of Technology</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>22</day><month>01</month><year>2026</year></pub-date><volume>93</volume><issue>1</issue><fpage>149</fpage><lpage>149</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Jayaprada P., Manepalli R.N., Rao K.K., Rao M.C., Satyanarayana T., Subbareddy Y., Rani N.U., Koutavarapu R., Kumar M.T., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Jayaprada P., Manepalli R.N., Rao K.K., Rao M.C., Satyanarayana T., Subbareddy Y., Rani N.U., Koutavarapu R., Kumar M.T.</copyright-holder><copyright-holder xml:lang="en">Jayaprada P., Manepalli R.N., Rao K.K., Rao M.C., Satyanarayana T., Subbareddy Y., Rani N.U., Koutavarapu R., Kumar M.T.</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://zhps.ejournal.by/jour/article/view/2102">https://zhps.ejournal.by/jour/article/view/2102</self-uri><abstract><p>Исследованы оптические свойства и параметр порядка смеси жидкокристаллической p-n-ундецилоксибензойной кислоты (11OBA) с включением наночастиц оксида цинка в различных концентрациях (0.5–2 мас.%). Выраженный максимум поглощения наблюдался при »235 нм как для чистых, так и для нанодисперсных жидкокристаллических образцов. Спектры фотолюминесценции демонстрируют два отчетливых максимума при 367 и 618 нм, тогда как наночастицы ZnO, диспергированные в 11OBA, показали один максимум при 392 нм. Максимум при 367 нм относится к излучению свободных экситонов вблизи края запрещенной зоны, максимум при 618 нм указывает на излучение с глубоких уровней, обусловленное точечными дефектами, такими как вакансии и междоузлия в запрещенной зоне. Рассчитаны параметры порядка для смеси 11OBA с наночастицами ZnO с использованием модели Кучински, экстраполяции Галлера, эффективной геометрии и модели Вукса в стабилизированной нематической области в видимом диапазоне на длинах волн 460, 500, 570 и 635 нм.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents the optical and order parameter studies of a mixture of liquid crystalline (LC) materials, such as p-n-undecyloxy benzoic acid (11OBA), including the incorporation of zinc oxide (ZnO) nanoparticles (NPs) at different weight concentrations (0.5–2 wt.%). Studies, including optical absorption, photoluminescence (PL), birefringence, refractive indices, and order parameters, were undertaken on the prepared samples. A prominent absorption peak was observed approximately at 235 nm for both the pure and nano-dispersed liquid crystal samples. The PL spectra exhibit two distinct peaks, located at 367 and 618 nm, whereas ZnO NPs dispersed 11OBA showed a single peak at 392 nm. The peak observed at 367 nm is attributed to near-band-edge emission of free excitons, whereas the peak at 618 nm is indicative of deep-level emission, resulting from point defects such as vacancies and interstitials within the bandgap. The order of parameter values are also calculated for the mixture of the 11OBA LC compound dispersed with ZnO NPs using different models like Kuczynksi, Haller extrapolation, effective geometry, and Vuks at a stabilized nematic region in the visible range at 460, 500, 570, and 635 nm wavelengths.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>11OBA</kwd><kwd>наночастицы ZnO</kwd><kwd>УФ-видимый диапазон</kwd><kwd>фотолюминесценция</kwd><kwd>показатель преломления</kwd><kwd>параметр порядка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>11OBA</kwd><kwd>zinc oxide nanoparticles</kwd><kwd>UV-visible</kwd><kwd>photoluminescence</kwd><kwd>refractive index</kwd><kwd>order parameter</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">P. G. De Gennes, J. Prost, The Physics of Liquid Crystals, Clarendon, Oxford (1993).</mixed-citation><mixed-citation xml:lang="en">P. G. 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