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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">techusgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета. Серия: Техника и технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University. Series: Engineering and Technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1528</issn><publisher><publisher-name>Юго-Западный государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">techusgu-97</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Свойства наноразмерных пигментов Zn(1-x)CoхO</article-title><trans-title-group xml:lang="en"><trans-title>Properties of Nanoscale Zn(1-x)CoхO Pigments</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6335-0230</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бузько</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Buz’ko</surname><given-names>V. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бузько Владимир Юрьевич, кандидат хими- ческих наук, доцент кафедры радиофизики и  нанотехнологий</p><p>ул. Ставропольская 149, г. Краснодар 350040</p><p>Scopus Author ID: 57223668439</p><p>РИНЦ AuthorID: 138793</p><p>ул. Московская 2, г. Краснодар 350072</p></bio><bio xml:lang="en"><p>Vladimir Y. Buz’ko, Сand. of Sci. (Chemistry), Associate Professor of the Department of Radiophysics and Nanotechnology</p><p>149 Stavropolskaya str., Krasnodar 350040</p><p>Scopus Author ID: 57223668439</p><p>РИНЦ AuthorID: 138793</p></bio><email xlink:type="simple">buzkonmr@mail.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/0000-0002-0027-2925</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мамелин</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamelin</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мамелин Юрий Валерьевич, аспирант  кафедры радиофизики и нанотехнологий</p><p>ул. Ставропольская 149, г. Краснодар 350040</p><p>Scopus Author ID: 57205284231 </p><p>РИНЦ AuthorID: 933699</p></bio><bio xml:lang="en"><p>Yuri V. Mamelin, Post-Graduate Student of the Department of Radiophysics and Nanotechnology </p><p>149 Stavropolskaya str., Krasnodar 350040</p><p>Scopus Author ID: 57205284231</p><p>РИНЦ AuthorID: 933699 </p></bio><email xlink:type="simple">ymamelin@bk.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9352-5970</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванин</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanin</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иванин Сергей Николаевич, кандидат химических наук, инженер-исследователь НОЦ «Диагностика структуры и свойств наноматериалов»</p><p>ул. Ставропольская 149, г. Краснодар 350040</p><p>Scopus Author ID: 57205188719</p><p>РИНЦ AuthorID: 1058391 </p></bio><bio xml:lang="en"><p>Sergey N. Ivanin, Сand. of Sci. (Chemistry), Research Engineer, REC "Diagnostics of the Structure and Properties of Nanomaterials</p><p>149 Stavropolskaya str., Krasnodar 350040</p><p>Scopus Author ID: 57205188719</p><p>РИНЦ AuthorID: 1058391 </p></bio><email xlink:type="simple">ivanin18071993@mail.ru</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>Копытов</surname><given-names>Г. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Kopytov</surname><given-names>G. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Копытов Геннадий Филипович, доктор  физико-математических наук, профессор,  заведующий кафедрой радиофизики и  нанотехнологий</p><p>ул. Ставропольская 149, г. Краснодар 350040</p><p>Scopus Author ID: 57205188719 </p><p>РИНЦ AuthorID: 75767 </p></bio><bio xml:lang="en"><p>Gennady F. Kopytov, Dr. of Sci. (Physics and  Mathematics),  Professor, Head of the Department of Radiophysics and Nanotechnology</p><p>149 Stavropolskaya str., Krasnodar 350040</p><p>Scopus Author ID: 57205188719</p><p>РИНЦ AuthorID: 75767 </p></bio><email xlink:type="simple">g137@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0920-7043</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Морозкина</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Morozkina</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Морозкина Елена Анатольевна, кандидат  педагогических наук, доцент, заведующая  кафедрой декоративно-прикладного искусства и дизайна</p><p>ул. Ставропольская 149, г. Краснодар 350040</p><p>РИНЦ AuthorID: 555823</p></bio><bio xml:lang="en"><p>Elena A. Morozkina, Сand. of Sci. (Pedagogical), Associate Professor, Head of the Department of Decorative and Applied Arts and Design</p><p>149 Stavropolskaya str., Krasnodar 350040</p><p>РИНЦ AuthorID: 555823</p></bio><email xlink:type="simple">morozkinaelena@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Кубанский государственный университет; Кубанский государственный технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kuban State University; Kuban Technological State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Кубанский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kuban State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2023</year></pub-date><volume>11</volume><issue>3</issue><fpage>125</fpage><lpage>138</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бузько В.Ю., Мамелин Ю.В., Иванин С.Н., Копытов Г.Ф., Морозкина Е.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Бузько В.Ю., Мамелин Ю.В., Иванин С.Н., Копытов Г.Ф., Морозкина Е.А.</copyright-holder><copyright-holder xml:lang="en">Buz’ko V.Y., Mamelin Y.V., Ivanin S.N., Kopytov G.F., Morozkina E.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://techusgu.elpub.ru/jour/article/view/97">https://techusgu.elpub.ru/jour/article/view/97</self-uri><abstract><p>Цель исследования – характеризация микроструктурных, оптических и электронных свойств синтезированных образцов наноразмерных неорганических пигментов состава Zn(1-x)CoxO (x = 0.02-0.15). </p><sec><title>Методы</title><p>Методы. Неорганические порошкообразные пигменты с общей формулой Zn(1-x)CoxO (x = 0.02-0.15) были синтезированы пирохимическим нитрат-мочевинным методом с использованием кристаллогидратов нитратов металлов и мочевины. Исходные реактивы в необходимом стехиометрическом отношении тщательно перемешивались с порошком мочевины в керамической ступке, затем производился термолиз реакционной смеси в керамических тиглях с разложением нитратных солей с образованием окрашенных порошков зеленого цвета разной интенсивности. Микроструктура порошков пигментов была исследована с использованием сканирующего электронного микроскопа «JEOL JSM – 7500F». Состав пигментов исследовался методом энергодисперсионного микроанализа с использованием приставки Inca X Sight EDX Spectrometer. Оптические спектры диффузного отражения порошков синтезированных пигментов измеряли на спектрофотометре «Hitachi U-3900» с двухканальной интегрирующей сферой в области спектра 300 до 900 нм. </p></sec><sec><title>Результаты</title><p>Результаты. Анализ гранулометрии синтезированных пигментов Zn(1-x)CoxO выявил, что они являются нанопорошками со средним размером наночастиц от 20 до 45 нм и с различной степенью агломерации. Спектры диффузного отражения от пигментов, допированных разным количеством ионов кобальта, в области спектра от 300 до 900 нм показывают систематическое возрастание интенсивности зеленой окраски с ростом содержания кобальта. Все исследованные образцы синтезированных пигментов  Zn(1-x)CoxO являются полупроводниковыми соединениями с наличием нескольких оптических прямых переходов. </p></sec><sec><title>Заключение</title><p>Заключение. Для исследованных неорганических пигментов зеленого цвета с общей формулой Zn(1-x)CoxO с увеличением процентного соотношения частиц кобальта в составе наблюдается снижение отражательной способности во всей исследуемой области спектра, а в особенности на участке от 600 до 680 нм. Различие в цветовых параметрах для исследованных неорганических пигментов состава Zn(1-x)CoxO преимущественно связано как с изменением долей хромогенных ионов кобальта в них, так и с изменением в ближайшей координации атомов кислорода в координационном полиэдре Co-On, влияющей на параметры электронных переходов иона Co2+. Рассчитанные параметры цвета в цветовом пространстве CIE L*a*b* позволяют ориентироваться на выбор состава пигментов Zn(1-x)CoxO для достижения желаемой окраски. </p></sec></abstract><trans-abstract xml:lang="en"><p>Purpose of research - characterization of microstructural, optical and electronic properties of synthesized samples of nanosized inorganic pigments of the composition Zn(1-x)CoxO (x = 0.02-0.15). </p><sec><title>Methods</title><p>Methods. Inorganic powder pigments with the general formula Zn(1-x)CoxO (x = 0.02-0.15) were synthesized by the pyrochemical nitrate-urea method using crystalline hydrates of metal nitrates and urea. The initial reagents in the required stoichiometric ratio were thoroughly mixed with urea powder in a ceramic mortar and then thermolysis of the reaction mixture was carried out in ceramic crucibles with the decomposition of nitrate salts with the formation of colored green powders of varying color intensity. The microstructure of the prepared pigment powders was investigated using a JEOL JSM-7500F scanning electron microscope. The composition of the pigments was studied by energy dispersive microanalysis using an Inca X Sight EDX Spectrometer attachment. Optical diffuse reflectance spectra of synthesized pigment powders were measured on a Hitachi U-3900 spectrophotometer with a two-channel integrating sphere in the wavelength range from 300 to 900 nm. </p></sec><sec><title>Results</title><p>Results. By means of particle SEM analysis of the synthesized Zn(1-x)CoxO pigments, it was taken into account that they are nanopowders with an average nanoparticle size from 20 to 45 nm and with varying degrees of nanoparticle agglomeration. The diffuse reflectance spectra of pigments doped with different amounts of cobalt ions in the wavelength range from 300 to 900 nm show a systematic increase in the intensity of the green color with an increase in the cobalt content. All studied samples of the synthesized pigments Zn(1-x)CoxO are semiconducting compounds with several direct-gap electronic transitions. </p></sec><sec><title>Conclusion</title><p>Conclusion. With an increase in the percentage of cobalt particles in the composition of the investigated green inorganic pigments with the general formula Zn(1-x)CoxO a decrease in reflectivity was observed in the entire investigated optical range, and especially in the range from 600 to 680 nm. The difference in color parameters for the studied inorganic oxide pigments of the composition Zn(1-x)CoxO is mainly associated with both a change in the fraction of chromogenic cobalt ions in them and a change in the nearest coordination of oxygen atoms in the Co-On coordination polyhedron, which affects the parameters of electronic transitions ion Co +. The calculated color parameters in the CIE Lab color space allow you to guide the selection of the composition of Zn(1-x)CoxO pigments to achieve the desired color. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>оксид-цинковые пигменты</kwd><kwd>наночастицы</kwd><kwd>спектры</kwd><kwd>диффузное отражение</kwd><kwd>электронные характеристики</kwd></kwd-group><kwd-group xml:lang="en"><kwd>zinc oxide pigments</kwd><kwd>nanoparticles</kwd><kwd>diffuse</kwd><kwd>reflectance spectra</kwd><kwd>electronic characteristics</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">Facile synthesis of three kobolds: introducing students to the structure of pigments and their characterization / P. Martin-Ramos, M. Susano, P. S. Pereira da Silva [et al.] // J. Chem. Educ. 2018. Vol. 95, is. 8, P. 1340–1344. http://doi.org/10.1021/acs.jchemed.7b00402.</mixed-citation><mixed-citation xml:lang="en">Martin-Ramos P., Susano M., Pereira da Silva P. S., eds. Facile Synthesis of three kobolds: introducing students to the structure of pigments and their characterization. J. Chem. 	Educ., 	2018, 	vol. 	95, 	is. 	8, 	pp. 	1340–1344. http://doi.org//10.1021/acs.jchemed.7b00402.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Synthesis of green cool pigments (CoxZn1-xO) for application in NIR radiation reflectance / J. Oliveira Primo, K. W. Borth, D. C. Peron [et al.] // Journal of Alloys and Compounds. 2019. Vol. 780. P. 17–24. http://doi.org/10.1016/j.jallcom.2018.11.358.</mixed-citation><mixed-citation xml:lang="en">Oliveira Primo J., Borth K. W., Peron  D. C., eds. Synthesis of green cool pigments (CoxZn1-xO) for application in NIR radiation reflectance. Journal of Alloys and Compounds, 2019, vol. 780, pp. 17–24. http://doi.org//10.1016/j.jallcom.2018.11.358.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">A review of near infrared reflectance properties of metal oxide nanostructures / V. Fang, J. Kennedy, J. Futter, J. Manning // GNS Science Report. 2013. Vol. 39. P. 1–20.</mixed-citation><mixed-citation xml:lang="en">Fang V., Kennedy J., Futter J., Manning J. A review of near infrared reflectance properties of metal oxide nanostructures. GNS Science Report, 2013, vol. 39, pp. 1–20.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Pigment compendium: a dictionary and optical microscopy of historical pigments / N. Eastaugh, V. Walsh, T. Chaplin [et al.]. Oxford: Butterworth-Heinemann, 2008. 958 p.</mixed-citation><mixed-citation xml:lang="en">Eastaugh, N., Walsh, V., Chaplin, T., eds. Pigment compendium: a dictionary and optical microscopy of historical pigments. Oxford, Butterworth-Heinemann, 2008. 958 p.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Photoluminescence in ZnO:Co2+ (0,01%−5%) nanoparticles, nanowires, thin films, and single crystals as a function of pressure and temperature: Exploring Electron−Phonon Interactions / C. Renero-Lecuna, R. Martin-Rodriguez, J. A. Gonzalez [et al.] // Chem. Mater. 2014. Vol. 26. P. 1100−1107. http://doi.org/10.1021/cm403371n.</mixed-citation><mixed-citation xml:lang="en">Renero-Lecuna C., Martin-Rodriguez R., Gonzalez J. A., eds. Photoluminescence in ZnO:Co2+ (0.01%−5%) nanoparticles, nanowires, thin films, and single crystals as a function of pressure and temperature: exploring electron−phonon interactions. Chem. Mater., 2014,  vol. 26, pp. 1100−1107. http://doi.org/10.1021/cm403371n.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Djurisic A. B., Chen X. Y., Leung Y. H. Recent progress in hydrothermal synthesis of zinc oxide nanomaterials // Recent Patents on Nanotechnology. 2012. Vol. 6. P. 124–134. http://doi.org/10.2174/187221012800270180.</mixed-citation><mixed-citation xml:lang="en">Djurisic A. B., Chen X. Y., Leung Y. H. Recent progress in hydrothermal synthesis of zinc oxide nanomaterials. Recent Patents on Nanotechnology, 2012, vol. 6, pp. 124–134. http://doi.org/10.2174/187221012800270180.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Synthesis and characterization of Zn1-xCoxO green pigments with low content cobalt oxide / N. Zhou, Y. Zhang, S. Nian [et al.] // Journal of Alloys and Compounds. 2017. Vol. 711. P. 406–413. http://doi.org/10.1016/j.jallcom.2017.04.015</mixed-citation><mixed-citation xml:lang="en">Zhou N., Zhang Y., Nian S., eds. Synthesis and characterization of Zn1-xCoxO green pigments with low content cobalt oxide. Journal of Alloys and Compounds, 2017, vol. 711, pp. 406–413. http://doi.org/10.1016/j.jallcom.2017.04.015.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Franco A., Pessoni H. V. S. Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders // Physica B: Condensed Matter. 2015. Vol. 476. P. 12–18. http://doi.org/10.1016/j.physb.2015.07.004.</mixed-citation><mixed-citation xml:lang="en">Franco A., Pessoni H. V. S. Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders. Physica B: Condensed Matter, 2015, vol. 476, pp. 12–18. http://doi.org/10.1016/j.physb.2015.07.004.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Design, synthesis, and application of colored cobalt pigments (pink, blue, green) / F. J. Anaissi, D. F. L. Horsth, J. Dalastra [et al.] // J. Braz. Chem. Soc. 2020. Vol. 31, is. 11. P. 2265–2273. http://doi.org/10.21577/0103-5053.20200078.</mixed-citation><mixed-citation xml:lang="en">Anaissi F. J., Horsth D. F. L., Dalastra J., eds. Design, synthesis, and application of colored cobalt pigments (Pink, Blue, Green). J. Braz. Chem. Soc., 2020, vol. 31, is. 11,  pp. 2265–2273. http://doi.org/10.21577/0103-5053.20200078.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Study of structural, optical and magnetic properties of cobalt doped ZnO nanorods / A. Chanda, S. Gupta, M. Vasundhara [et al.] // RSC Adv. 2017, Vol. 7, is. 80. P. 50527– 50536. http://doi.org/10.1039/C7RA08458G.</mixed-citation><mixed-citation xml:lang="en">Chanda A., Gupta S., Vasundhara M., eds. Study of structural, optical and magnetic properties of cobalt doped ZnO. RSC Adv., 2017, vol. 7, is. 80, pp. 50527–50536. http://doi.org/10.1039/C7RA08458G.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Jakani M., Campet G., Claverie J. Photoelectrochemical Properties of Zinc Oxide Doped with 3d Elements // Journal of solid-state chemistry. 1985. Vol. 56, is. 3. P. 269–277. http://doi.org/10.1016/0022-4596(85)90176-8.</mixed-citation><mixed-citation xml:lang="en">Jakani M., Campet G., Claverie J. Photoelectrochemical properties of zinc oxide doped with 3D elements. Journal of Solid-State Chemistry, 1985, vol. 56, is. 3, pp. 269–277. http://doi.org/10.1016/0022-4596(85)90176-8.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Исследование возможности имитирования оптических характеристик естественно-стареющих листьев / Ю. В. Мамелин, В. Ю. Бузько, А. С. Данилов, А. С. Мамелина // Инженерный вестник Дона. 2020. № 11. С. 72–81.</mixed-citation><mixed-citation xml:lang="en">Mamelin Y. V., Kopytov G. F., Buz’ko V. Y. Issledovaniye vozmozhnosti imitirovaniya opticheskikh kharakteristik yestestvenno-stareyushchikh list'yev [Investigation of the possibility of imitating the optical characteristics of naturally aging leaves]. Inzhenernyy vestnik Dona = Don's Engineering Herald, 2020, no. 11, рр. 72–81.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Мамелин Ю. В., Бузько В. Ю., Копытов Г. Ф. Оптические характеристики неорганических зелёных пигментов с общей формулой Zn(1-X)CoXO // Научные исследования и разработки: новое и актуальное: материалы X Международной научнопрактической конференции. Ростов н/Д: Южный федер. ун-т, 2021. С. 179–183.</mixed-citation><mixed-citation xml:lang="en">Mamelin Y. V., Kopytov G. F., Buz’ko V. Y. Opticheskiye kharakteristiki neorganicheskikh zelonykh pigmentov s obshchey formuloy [Optical characteristics of inorganic green pigments with a general formula]. Nauchnyye issledovaniya i razrabotki: novoye i aktual'noye. Materialy X Mezhdunarodnoy nauchno-prakticheskoy konferentsii [Scientific research and development: new and relevant. Materials of the X International Scientific and Practical Conference]. Rostov-on-Don, South Federal Univ. Publ., 2021, pp. 179–183.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Mamelin Y. V., Kopytov G. F., Buzko V. Y. Studying optical characteristics of diffused light reflecting from naturally senescing leaves of deciduous trees // Herald of the (1-x)CoxO Bauman Moscow State Technical University. Series Natural Sciences. 2020. Vol. 92, is. 5. P. 72–82. http://doi.org/10.18698/1812-3368-2020-5-72-82.</mixed-citation><mixed-citation xml:lang="en">Mamelin Y. V., Kopytov G. F., BuzkoV. Y. Studying optical characteristics of diffused light reflecting from naturally senescing leaves of deciduous trees. Herald of the Bau(1-x)CoxO man Moscow State Technical University. Series Natural Sciences, 2020, vol. 92, is. 5, pp. 72–82. http://doi.org/10.18698/1812-3368-2020-5-72-82.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Hapke B. Theory of reflectance and emittance spectroscopy. Cambridge: Cambridge University Press, 2012. Vol. 5. 513 p. http://doi.org/10.1017/CBO9780511524998.</mixed-citation><mixed-citation xml:lang="en">Hapke, B. Theory of Reflectance and Emittance Spectroscopy. Cambridge, Cambridge University Press, 2012, vol. 5. 513 p. http://doi.org/10.1017/CBO9780511524998.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Anandhi J. T., Rayer S. L., Chithambarathanu T. Synthesis, FTIR studies and optical properties of aluminium doped chromium oxide nanoparticles by microwave irradiation at different concentrations // Chemical and Materials Engineering. 2017. Vol. 5, is. 2. P. 43–54. http://doi.org/10.13189/cme.2017.050204.</mixed-citation><mixed-citation xml:lang="en">Anandhi J. T., Rayer S. L., Chithambarathanu T. Synthesis, FTIR studies and optical properties of aluminium doped chromium oxide nanoparticles by microwave irradiation at different concentrations. Chemical and Materials Engineering, 2017, vol. 5, is. 2, pp.  43–54. http://doi.org/10.13189/cme.2017.050204.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Optical bandgap of semiconductor nanostructures: Methods for experimental data analysis / R. Raciti, R. Bahariqushchi, C. Summonte [et. al] // Journal of Applied Physics. 2017. Vol. 121, is. 23. P. e234304. http://doi.org/10.1063/1.4986436.</mixed-citation><mixed-citation xml:lang="en">Raciti R., Bahariqushchi R., Summonte С., eds. Optical bandgap of semiconductor nanostructures: Methods for experimental data analysis. Journal of Applied Physics, 2017,  vol. 121, is. 23, pp. e234304. http://doi.org/10.1063/1.4986436.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">White W. B., McCarthy G. J., Sheetz B. E. Optical spectra of chromium, nickel and cobalt-containing pyroxenes // The American Mineralogist. 1971. Vol. 56. P. 72–89.</mixed-citation><mixed-citation xml:lang="en">White W. B., McCarthy G. J., Sheetz B. E. Optical spectra of chromium, nickel and cobalt-containing pyroxenes. The American Mineralogist, 1971, vol. 56, pp. 72–89.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Umadevi Godavarti, Mote V. D., Madhavaprasad Dasari. Role of cobalt doping on the electrical conductivity of ZnO nanoparticles // Journal of Asian Ceramic Societies. 2017. Vol. 5, is. 4. P. 391–396. https://doi.org/10.1016/j.jascer.2017.08.002.</mixed-citation><mixed-citation xml:lang="en">Godavarti U., Mote V. D., Dasari M. Role of cobalt doping on the electrical conductivity of ZnO nanoparticles. Journal of Asian Ceramic Societies, 2017, Vol. 5, is. 4, pp. 391– 396. https://doi.org/10.1016/j.jascer.2017.08.002.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Structural and optical properties of pure and copper doped zinc oxide nanoparticles / M. Sajjad, I. Ullah, M. I. Khan, J. Khan, M. Y. Khan, M. T. Qureshi // Results in Physics. 2018. Vol. 9. P. 1301–1309. http://doi.org/10.1016/j.rinp.2018.04.010.</mixed-citation><mixed-citation xml:lang="en">Sajjad M., Ullah, I., Khan M. I., Khan J., Khan M. Y., Qureshi M. T. Structural and optical properties of pure and copper doped zinc oxide nanoparticles. Results in Physics, 2018, vol. 9, pp. 1301–1309. https://doi.org/10.1016/j.rinp.2018.04.010.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Structural and optical properties of ZnO and co doped ZnO thin films prepared by Sol-Gel / A. R. Khantoul, M. Sebais, B. Rahal // Acta Physica Polonica A. 2018. Vol. 133, is. 1. P. 114–117.</mixed-citation><mixed-citation xml:lang="en">Khantoul A. R., Sebais M., Rahal B. Structural and optical properties of ZnO and Co Doped ZnO thin films prepared by Sol-Gel. Acta Physica Polonica. A, 2018, vol. 133, is. 1, pp. 114–117.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Kapil Y., Salkar R. B., Tangsali R. S. Preparation characterization and magnetic Properties of Zn(1-X)CoxO nanoparticle dilute magnetic semiconductors // Superlattices and Microstructures. 2019. Vol. 126. P. 158–173. http://doi.org/10.1016/j.spmi.2018.12.013.</mixed-citation><mixed-citation xml:lang="en">Kapil Y., Salkar R. B., Tangsali R. S. Preparation characterization and magnetic properties of Zn(1-X)CoxO nanoparticle dilute magnetic semiconductors. Superlattices and Microstructures, 2019, vol. 126, pp. 158–173. http://doi.org/10.1016/j.spmi.2018.12.013.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
