<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">10.17586/2220-8054-2024-15-6-902-909</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-195</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>SERS substrates based on opal films with gold coating</article-title><trans-title-group xml:lang="ru"><trans-title>Подложки для спектроскопии ГКР на основе опаловых пленок с золотым покрытием</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>Астафуров</surname><given-names>М. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Astafurov</surname><given-names>M. O.</given-names></name></name-alternatives><bio xml:lang="en"><p>Mikhail O. Astafurov</p><p>119991 Leninskie gory 1, bld. 3, Moscow</p></bio><email xlink:type="simple">mihast0707@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/0000-0002-1489-6747</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Переведенцева</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Perevedentseva</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Elena V. Perevedentseva</p><p>Leninskii prospekt 53, 119991, Moscow</p></bio><email xlink:type="simple">perevedencevaev@lebedev.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/0000-0002-0212-9903</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мельник</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Melnik</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="en"><p>Nikolay N. Melnik</p><p>Leninskii prospekt 53, 119991, Moscow</p></bio><email xlink:type="simple">melniknn@lebedev.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/0000-0002-2378-7446</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баранчиков</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Baranchikov</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="en"><p>Alexander E. Baranchikov</p><p>Leninskii prospekt 31, 119071, Moscow</p></bio><email xlink:type="simple">a.barantchikov@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3820-4853</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дорофеев</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Dorofeev</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>Sergey G. Dorofeev</p><p>119991 Leninskie gory 1, bld. 3, Moscow</p></bio><email xlink:type="simple">dorofeev@inorg.chem.msu.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/0000-0001-6221-3093</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ежов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ezhov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Alexander A. Ezhov</p><p>119991 Leninskie gory 1, bld. 3, Moscow</p></bio><email xlink:type="simple">alexander-ezhov@yandex.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/0000-0001-6102-9024</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Григорьева</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Grigorieva</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Anastasia V. Grigorieva</p><p>119991 Leninskie gory 1, bld. 3, Moscow</p></bio><email xlink:type="simple">anastasia@inorg.chem.msu.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/0000-0001-6102-1305</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Климонский</surname><given-names>С. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Klimonsky</surname><given-names>S. O.</given-names></name></name-alternatives><bio xml:lang="en"><p>Sergey O. Klimonsky</p><p>119991 Leninskie gory 1, bld. 3, Moscow</p></bio><email xlink:type="simple">klimonskyso@my.msu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>P. N. Lebedev Physical Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-3"><institution>Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>05</day><month>06</month><year>2025</year></pub-date><volume>15</volume><issue>6</issue><fpage>902</fpage><lpage>909</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Astafurov M.O., Perevedentseva E.V., Melnik N.N., Baranchikov A.E., Dorofeev S.G., Ezhov A.A., Grigorieva A.V., Klimonsky S.O., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Астафуров М.О., Переведенцева Е.В., Мельник Н.Н., Баранчиков А.Е., Дорофеев С.Г., Ежов А.А., Григорьева А.В., Климонский С.О.</copyright-holder><copyright-holder xml:lang="en">Astafurov M.O., Perevedentseva E.V., Melnik N.N., Baranchikov A.E., Dorofeev S.G., Ezhov A.A., Grigorieva A.V., Klimonsky S.O.</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/195">https://nanojournal.ifmo.ru/jour/article/view/195</self-uri><abstract><p>Substrates for Surface-Enhanced Raman Spectroscopy (SERS) were fabricated by gold sputtering onto surface of synthetic opal films and their characteristics were studied at wavelengths λ = 532 and 785 nm. Synthetic opal films were fabricated by self-assembly of spherical SiO2 particles on vertical substrates. It was found that at the concentration of the analyte methylene blue equal to 10−5 M the intensity of SERS at the wavelength of 785 nm increased with increasing amount of sputtered gold up to a certain optimal thickness exceeding 35 nm, while at the concentration of 10−6 M this dependence was not observed. It is assumed that this is due to the complex amount-dependent morphology of the sputtered gold coating and the presence of “hot spots” of different strengths. For the best samples at a wavelength of λ = 785 nm, the SERS enhancement factor was of 7·104 and a detection limit for methylene blue reached 3·10−7 M that exceeds the results published for similar substrates previously. The SERS parameters obtained for λ = 532 nm were less attractive, despite the additional enhancement due to this wavelength was at the edge of the photonic stop-band.</p></abstract><trans-abstract xml:lang="ru"><p>Подложки для гигантского комбинационного рассеяния (ГКР) были сформированы с помощью напыления золота на поверхность пленки синтетического опала, и их свойства были изучены при длине волны λ = 532 и 785 нм. Пленки синтетического инвертированного опала были сформированы методом самосборки сферических частиц на вертикально SiO2 ориентированных подложках. Было обнаружено, что при концентрации аналита метиленового синего порядка 10-5 M интенсивность ГКР при длине волны возбуждающего лазера 785 нм растет с увеличением количества нанесенного золота до определенной оптимальной толщины, превышающей 35 нм, в то время как при концентрации аналита 10-6 M такой зависимости не наблюдается. Предполагается, что это связано со сложной морфологией нанесеннего золотого покрытия, зависящей от количества вещества, и присутствия «горячих точек» различной силы. Для лучших образцов на длине волны λ = 785 нм коэффициент усиления ГКР составлял 7∙104 и предел обнаружения метиленового синего  составлял 3∙10-7 M, что превышает результаты, опубликованные ранее для подобных подложек. Параметры ГКР для длины волны λ = 532 нм были менее яркими, несмотря на дополнительное усиление за счет попадания длины волны лазера в край фотонной стоп-зоны.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>опал диоксида кремния</kwd><kwd>покрытие золота</kwd><kwd>микроструктура</kwd><kwd>«горячие точки»</kwd><kwd>гигантское комбинационное рассеяние</kwd></kwd-group><kwd-group xml:lang="en"><kwd>silica opal</kwd><kwd>gold coating</kwd><kwd>Surface-Enhanced Raman spectroscopy</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The authors are grateful to the Russian Science Foundation for financial support of the present research (Grant No. 23-23-00252). This work was partially performed using the scanning probe microscope NT-MDT NTEGRA Prima upgraded up to NT-MDT NTEGRA II by Nova SPb from Program for the Development of Moscow State University. Scanning electron microscopy was performed using the equipment of the JRC PMR IGIC RAS. The authors also thank Daniil Kozlov for assistance with electron microscopy.</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">Liang L., Zhao X., Wen J., Liu J., Zhang F., Guo X., Zhang K., Wang A., Gao R., Wang Y., Zhang Y. Flexible SERS Substrate with a Ag–SiO2 Cosputtered Film for the Rapid and Convenient Detection of Thiram. Langmuir, 2022, 38, P. 13753–13762.</mixed-citation><mixed-citation xml:lang="en">Liang L., Zhao X., Wen J., Liu J., Zhang F., Guo X., Zhang K., Wang A., Gao R., Wang Y., Zhang Y. Flexible SERS Substrate with a Ag–SiO2 Cosputtered Film for the Rapid and Convenient Detection of Thiram. Langmuir, 2022, 38, P. 13753–13762.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Varasteanu P., Bujor A.M., Pachiu C., Craciun G., Mihalache I., Tucureanu V., Romanitan C., Pascu R., Boldeiu A. Close-packed small nanocubes assemblies as efficient SERS substrates. J. of Molecular Structure, 2023, 1294, 136441.</mixed-citation><mixed-citation xml:lang="en">Varasteanu P., Bujor A.M., Pachiu C., Craciun G., Mihalache I., Tucureanu V., Romanitan C., Pascu R., Boldeiu A. Close-packed small nanocubes assemblies as efficient SERS substrates. J. of Molecular Structure, 2023, 1294, 136441.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Zha Z., Liu R., Yang W., Li C., Gao J., Shafi M., Fan X., Li Z., Du X., Jiang S. Surface-enhanced Raman scattering by the composite structure of Ag NP-multilayer Au films separated by Al2O3. Optics Express, 2021, 29 (6), P. 8890–8901.</mixed-citation><mixed-citation xml:lang="en">Zha Z., Liu R., Yang W., Li C., Gao J., Shafi M., Fan X., Li Z., Du X., Jiang S. Surface-enhanced Raman scattering by the composite structure of Ag NP-multilayer Au films separated by Al2O3. Optics Express, 2021, 29 (6), P. 8890–8901.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Cai Z., Yan Y., Liu L., Lin S., Hu X. Controllable fabrication of metallic photonic crystals for ultra-sensitive SERS and photodetectors. RSC Adv., 2017, 7, P. 55851–55858.</mixed-citation><mixed-citation xml:lang="en">Cai Z., Yan Y., Liu L., Lin S., Hu X. Controllable fabrication of metallic photonic crystals for ultra-sensitive SERS and photodetectors. RSC Adv., 2017, 7, P. 55851–55858.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">He L., Huang J., Xu T., Chen L., Zhang K., Han S., He Y., Lee S.T. Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate. J. Mater. Chem., 2012, 22, P. 1370–1374.</mixed-citation><mixed-citation xml:lang="en">He L., Huang J., Xu T., Chen L., Zhang K., Han S., He Y., Lee S.T. Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate. J. Mater. Chem., 2012, 22, P. 1370–1374.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Martynova N.A., Goldt A.E., Grigorieva A.V. Au-Au composites with inverse opal structure for surface-enhanced Raman spectroscopy. Gold Bulletin, 2018, 51, P. 57–64.</mixed-citation><mixed-citation xml:lang="en">Martynova N.A., Goldt A.E., Grigorieva A.V. Au-Au composites with inverse opal structure for surface-enhanced Raman spectroscopy. Gold Bulletin, 2018, 51, P. 57–64.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Zhu A., Zhao X., Cheng M., Chen L., Wang Y., Zhang X., Zhang Y., Zhang X. Nanohoneycomb Surface-Enhanced Raman Spectroscopy-Active Chip for the Determination of Biomarkers of Hepatocellular Carcinoma. ACS Appl. Mater. Interfaces, 2019, 11, P. 44617–44623.</mixed-citation><mixed-citation xml:lang="en">Zhu A., Zhao X., Cheng M., Chen L., Wang Y., Zhang X., Zhang Y., Zhang X. Nanohoneycomb Surface-Enhanced Raman Spectroscopy-Active Chip for the Determination of Biomarkers of Hepatocellular Carcinoma. ACS Appl. Mater. Interfaces, 2019, 11, P. 44617–44623.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Guo H., Qian K., Cai A., Tang J., Liu J. Ordered gold nanoparticle arrays on the tip of silver wrinkled structures for single molecule detection. Sensors &amp; Actuators: B. Chemical, 2019, 300, 126846.</mixed-citation><mixed-citation xml:lang="en">Guo H., Qian K., Cai A., Tang J., Liu J. Ordered gold nanoparticle arrays on the tip of silver wrinkled structures for single molecule detection. Sensors &amp; Actuators: B. Chemical, 2019, 300, 126846.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Ke X., Chen J., Chang L., Zhou Z., Zhang W. Casting liquid PDMS on self-assembled bilayer polystyrene nanospheres to prepare a SERS substrate with two layers of nanopits for detection of p-nitrophenol. Anal. Methods, 2023, 15, P. 4582–4590.</mixed-citation><mixed-citation xml:lang="en">Ke X., Chen J., Chang L., Zhou Z., Zhang W. Casting liquid PDMS on self-assembled bilayer polystyrene nanospheres to prepare a SERS substrate with two layers of nanopits for detection of p-nitrophenol. Anal. Methods, 2023, 15, P. 4582–4590.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Wei M.-X., Liu C.-H., Lee H., Lee B.-W., Hsu C.-H., Lin H.-P., Wu Yu-C. Synthesis of High-Performance Photonic Crystal Film for SERS Applications via Drop-Coating Method. Coatings, 2020, 10, 679.</mixed-citation><mixed-citation xml:lang="en">Wei M.-X., Liu C.-H., Lee H., Lee B.-W., Hsu C.-H., Lin H.-P., Wu Yu-C. Synthesis of High-Performance Photonic Crystal Film for SERS Applications via Drop-Coating Method. Coatings, 2020, 10, 679.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Chen G., Zhang K., Luo B., Hong W., Chen J., Chen X. Plasmonic-3D photonic crystals microchip for surface enhanced Raman spectroscopy. Biosensors and Bioelectronics, 2019, 143, 111596.</mixed-citation><mixed-citation xml:lang="en">Chen G., Zhang K., Luo B., Hong W., Chen J., Chen X. Plasmonic-3D photonic crystals microchip for surface enhanced Raman spectroscopy. Biosensors and Bioelectronics, 2019, 143, 111596.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Chen H., Song C., Peng Z., Mao J., Zhang Y., Chen S., Zhang W., Zhang S., Zhao W., Ouyang G. The Fabrication of Photonic Crystal Microchip with Controllable Wettability and SERS Activity based on Surface Roughness for Trace Organic Compounds Determination. Adv. Mater. Interfaces, 2022, 2102178.</mixed-citation><mixed-citation xml:lang="en">Chen H., Song C., Peng Z., Mao J., Zhang Y., Chen S., Zhang W., Zhang S., Zhao W., Ouyang G. The Fabrication of Photonic Crystal Microchip with Controllable Wettability and SERS Activity based on Surface Roughness for Trace Organic Compounds Determination. Adv. Mater. Interfaces, 2022, 2102178.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Li W., Lu X., Yang R., Liang F., Chen W., Xie Z., Zheng J., Zhu J., Huang Y., Yue W., Li L., Su Y. Highly sensitive and reproducible SERS substrates with binary colloidal crystals (bCCs) based on MIM structures. Applied Surface Science, 2022, 597, 153654.</mixed-citation><mixed-citation xml:lang="en">Li W., Lu X., Yang R., Liang F., Chen W., Xie Z., Zheng J., Zhu J., Huang Y., Yue W., Li L., Su Y. Highly sensitive and reproducible SERS substrates with binary colloidal crystals (bCCs) based on MIM structures. Applied Surface Science, 2022, 597, 153654.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Dzhagan V., Mazur N., Kapush O., Skoryk M., Pirko Y., Yemets A., Dzhahan Vl., Shepeliavyi P., Valakh M., and Yukhymchuk V. Self-Organized SERS Substrates with Efficient Analyte Enrichment in the Hot Spots. ACS Omega, 2024, 9, P. 4819–4830.</mixed-citation><mixed-citation xml:lang="en">Dzhagan V., Mazur N., Kapush O., Skoryk M., Pirko Y., Yemets A., Dzhahan Vl., Shepeliavyi P., Valakh M., and Yukhymchuk V. Self-Organized SERS Substrates with Efficient Analyte Enrichment in the Hot Spots. ACS Omega, 2024, 9, P. 4819–4830.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Galisteo-Lopez J.F., Ibisate M., Sapienza R., Froufe Perez L.S., Blanco A., Lopez C. Self-Assembled Photonic Structures. Adv. Mater., 2011, 23, P. 30–69.</mixed-citation><mixed-citation xml:lang="en">Galisteo-Lopez J.F., Ibisate M., Sapienza R., Froufe Perez L.S., Blanco A., Lopez C. Self-Assembled Photonic Structures. Adv. Mater., 2011, 23, P. 30–69.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Liu J., Zhao H., Wu M., Van der Schueren B., Yu Li, Deparis O., Ye J., Ozin G.A., Hasan T., Su B.-L. Slow Photons for Photocatalysis and Photovoltaics. Adv. Mater., 2017, 29, 1605349.</mixed-citation><mixed-citation xml:lang="en">Liu J., Zhao H., Wu M., Van der Schueren B., Yu Li, Deparis O., Ye J., Ozin G.A., Hasan T., Su B.-L. Slow Photons for Photocatalysis and Photovoltaics. Adv. Mater., 2017, 29, 1605349.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Ashurov M., Abdusatorov B., Baranchikov A., Klimonsky S. Surface-enhanced Raman scattering in ETPTA inverse photonic crystals with gold nanoparticles. Phys. Chem. Chem. Phys., 2021, 23, P. 20275–20281.</mixed-citation><mixed-citation xml:lang="en">Ashurov M., Abdusatorov B., Baranchikov A., Klimonsky S. Surface-enhanced Raman scattering in ETPTA inverse photonic crystals with gold nanoparticles. Phys. Chem. Chem. Phys., 2021, 23, P. 20275–20281.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Jiang P., Bertone J.F., Hwang K.S., Colvin V.L. Single-Crystal Colloidal Multilayers of Controlled Thickness. Chem. Mater., 1999, 11, P. 2132–2140.</mixed-citation><mixed-citation xml:lang="en">Jiang P., Bertone J.F., Hwang K.S., Colvin V.L. Single-Crystal Colloidal Multilayers of Controlled Thickness. Chem. Mater., 1999, 11, P. 2132–2140.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Klimonsky S.O., Bakhia T., Knotko A.V., Lukashin A.V. Synthesis of Narrow Dispersed SiO2 Colloidal Particles and Colloidal Crystal Films Based on Them. Doklady Chemistry, 2014, 457 (1), P. 115–117.</mixed-citation><mixed-citation xml:lang="en">Klimonsky S.O., Bakhia T., Knotko A.V., Lukashin A.V. Synthesis of Narrow Dispersed SiO2 Colloidal Particles and Colloidal Crystal Films Based on Them. Doklady Chemistry, 2014, 457 (1), P. 115–117.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">St¨ober W., Fink A., Bohn E. Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range. J. Colloid Interface Sci., 1968, 26, P. 62–69.</mixed-citation><mixed-citation xml:lang="en">St¨ober W., Fink A., Bohn E. Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range. J. Colloid Interface Sci., 1968, 26, P. 62–69.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Bakhia T., Baranchikov A.E., Gorelik V.S., Klimonsky S.O. Local Optical Spectroscopy of Opaline Photonic Crystal Films. Crystallography Reports, 2017, 62 (5), P. 783–786.</mixed-citation><mixed-citation xml:lang="en">Bakhia T., Baranchikov A.E., Gorelik V.S., Klimonsky S.O. Local Optical Spectroscopy of Opaline Photonic Crystal Films. Crystallography Reports, 2017, 62 (5), P. 783–786.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Le Ru E., Blackie E., Meyer M., Etchegoin P.G. Surface Enhanced Raman Scattering Enhancement Factors: A Comprehensive Study. J. Phys. Chem. C, 2007, 111 (37), P. 13794–13803.</mixed-citation><mixed-citation xml:lang="en">Le Ru E., Blackie E., Meyer M., Etchegoin P.G. Surface Enhanced Raman Scattering Enhancement Factors: A Comprehensive Study. J. Phys. Chem. C, 2007, 111 (37), P. 13794–13803.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Yan Q., Zhou Z., Zhao X.S. Inward-Growing Self-Assembly of Colloidal Crystal Films on Horizontal Substrates. Langmuir, 2005, 21 (7), P. 3158–3164.</mixed-citation><mixed-citation xml:lang="en">Yan Q., Zhou Z., Zhao X.S. Inward-Growing Self-Assembly of Colloidal Crystal Films on Horizontal Substrates. Langmuir, 2005, 21 (7), P. 3158–3164.</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>
