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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Computational nanotechnology</journal-id><journal-title-group><journal-title xml:lang="en">Computational nanotechnology</journal-title><trans-title-group xml:lang="kk"><trans-title>Computational nanotechnology</trans-title></trans-title-group><trans-title-group xml:lang="pt"><trans-title>Computational nanotechnology</trans-title></trans-title-group><trans-title-group xml:lang="ru"><trans-title>Computational nanotechnology</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>Computational nanotechnology</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-223X</issn><issn publication-format="electronic">2587-9693</issn><publisher><publisher-name xml:lang="en">YUR-VAK</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">545847</article-id><article-id pub-id-type="doi">10.33693/2313-223X-2023-10-1-128-137</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>NANOTECHNOLOGY AND NANOMATERIALS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>НАНОТЕХНОЛОГИИ И НАНОМАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Atomic and electronic structure of quantum dots on the basis of CdSe</article-title><trans-title-group xml:lang="ru"><trans-title>Атомная и электронная структура квантовых точек на основе CdSe</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zavodinsky</surname><given-names>Victor G.</given-names></name><name xml:lang="ru"><surname>Заводинский</surname><given-names>Виктор Григорьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Physics and Mathematics, Professor; leader-researcher at the Khabarovsk Department of the Institute of Applied Mathematicks of the Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, профессор; ведущий научный сотрудник Института материаловедения ХНЦ ДВО РАН</p></bio><email>vzavod@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorkusha</surname><given-names>Olga A.</given-names></name><name xml:lang="ru"><surname>Горкуша</surname><given-names>Ольга Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate of Physics and Mathematics; senior researcher at the Khabarovsk Department of Institute of Applied Mathematics of the Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук; старший научный сотрудник Хабаровского отделения Института прикладной математики ДВО РАН</p></bio><email>o_garok@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Applied Mathematics of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Хабаровское отделение Института прикладной математики ДВО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2023</year></pub-date><volume>10</volume><issue>1</issue><issue-title xml:lang="en">VOL 10, NO1 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 10, №1 (2023)</issue-title><fpage>128</fpage><lpage>137</lpage><history><date date-type="received" iso-8601-date="2023-07-11"><day>11</day><month>07</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Yur-VAK</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Юр-ВАК</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Yur-VAK</copyright-holder><copyright-holder xml:lang="ru">Юр-ВАК</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://journals.eco-vector.com/2313-223X/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/2313-223X/article/view/545847">https://journals.eco-vector.com/2313-223X/article/view/545847</self-uri><abstract xml:lang="en"><p>Within the framework of the density functional theory, comparative calculations of the total energy and electronic states of Cd<italic><sub>n</sub></italic>Se<italic><sub>n</sub></italic> nanoparticles with a structure of three types: wurtzite, sphalerite and NaCl were performed. It has been shown that for <italic>n</italic> ≤ 72, the formation of a NaCl type structure is energetically favorable. However, extrapolation of the energy values per Cd–Se atom pair shows that for <italic>n</italic> &gt; 130 (corresponding to a size of about 2 nm), wurtzite-type particles can be more advantageous than particles with the NaCl structure. The electronic structure of Cd<italic><sub>n</sub></italic>Se<italic><sub>n</sub></italic>, Cd<italic><sub>n</sub></italic>S<italic><sub>n</sub></italic>, and Zn<italic><sub>n</sub></italic>S<italic><sub>n</sub></italic> nanoparticles, as well as CdSe/CdS and CdSe/CdS/ZnS quantum dots, has been studied. It is shown that the ZnS shell not only increases the band gap of a quantum dot, but also significantly increases the intensity of its emission due to the appearance of electronic states near the band gap.</p></abstract><trans-abstract xml:lang="ru"><p>В рамках теории функционала плотности выполнены сравнительные расчеты полной энергии и электронных состояний наночастиц Cd<italic><sub>n</sub></italic>Se<italic><sub>n</sub></italic> со структрой трех типов: вюрцит, сфалерит и NaCl. Показано, что при <italic>n</italic> ≤ 72 энергетически выгодно формирование структуры типа NaCl. Однако экстраполяция величин энергии, приходящейся на пару атомов Cd–Se, показывает, что при <italic>n</italic> &gt; 130 (что соответствует размеру около 2 нм) частицы со структурой типа «вюрцит» могут быть более выгодны, чем частицы со структурой NaCl. Исследована электронная структура наночастиц Cd<italic><sub>n</sub></italic>Se<italic><sub>n</sub></italic>, Cd<italic><sub>n</sub></italic>S<italic><sub>n</sub></italic> и Zn<italic><sub>n</sub></italic>S<italic><sub>n</sub></italic>, а также квантовых точек CdSe/CdS и CdSe/CdS/ZnS. Показано, что оболочка ZnS не только увеличивает ширину запрещенной зоны квантовой точки, но и существенно повышает интенсивность ее излучения за счет появления электронных состояний вблизи запрещенной зоны.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nanoparticles</kwd><kwd>cadmium selenide</kwd><kwd>quantum dots</kwd><kwd>energy gap</kwd><kwd>luminescence</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>наночастицы</kwd><kwd>селенид кадмия</kwd><kwd>квантовые точки</kwd><kwd>энергетическая щель</kwd><kwd>люминесценция</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Имамов Э.З., Муминов Р.А., Рахимов Р.Х. Анализ эффективности солнечного элемента с наноразмерными гетеропереходами // Computational Nanotechnology. 2021. Т. 8. № 4. С. 42–50.</mixed-citation><mixed-citation xml:lang="ru">Rani S., Thanka Rajan S., Shanthi J. et al. 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