Публикации

Pre-crystallization heat treatment and infrared luminescence enhancement in ni2-doped transparent glass-ceramics / N. V. Golubev, E. S. Ignat'eva, V. M. Mashinsky et al. // Journal of Non-Crystalline Solids. — 2019. — Vol. 515. — P. 42–49. We report on design and fabrication of Ni2+-doped glass-ceramics from a low-alkali optical glass in Li2O-Na2O-Ga2O3-SiO2-GeO2 system by melting technique and subsequent thermally controlled nano-crystallization. The analysis of differential scanning calorimetry, X-ray diffraction, transmission electron microscopy, absorption and fluorescence spectroscopy reveals, for the first time, the real possibility of optimizing the integrated intensity of Ni2+ near-infrared emission through controlled pre-treatments at temperatures of nanophase nucleation, with the enhancement up to a factor of four with respect to gallium germanosilicate glass-ceramics obtained without pre-treatments. Importantly, the effects on the light emission are shown to be related to the influence of pre-treatment on size and size distribution of the gallium oxide nanocrystals which result from subsequent crystallization at higher temperature. [ DOI ]

Responsive charge transport in wide-band-gap oxide films of nanostructured amorphous alkali-gallium-germanosilicate / J. Remondina, A. Paleari, N. V. Golubev et al. // Journal of Materials Chemistry С. — 2019.

ПЕРСПЕКТИВЫ ИСПОЛЬЗОВАНИЯ АКТИВИРОВАННЫХ СТЕКОЛ НА ОСНОВЕ СИСТЕМЫ (y1-xlnx)2o3-al2o3-b2o3 В КАЧЕСТВЕ ЛЮМИНЕСЦЕНТНЫХ КОНВЕРТОРОВ И КОНЦЕНТРАТОРОВ СОЛНЕЧНОЙ ЭНЕРГИИ / Г. Е. МАЛАШКЕВИЧ, В. В. КОВГАР, Т. Г. ХОТЧЕНКОВА и др. // Перспективные материалы и технологии: сборник материалов международного симпозиума, 27 -30 мая 2019 г., г.Брест, Беларусь / под. ред. чл.-корр. Рубаника В.В. — Materials Engineering. — Витебский государственный технологический университет Витебск, 2019. — С. 421–423.

Direct femtosecond laser-induced formation of cds quantum dots inside silicate glass / M. P. Vetchinnikov, A. S. Lipatiev, G. Y. Shakhgildyan et al. // Optics Letters. — 2018. — Vol. 43, no. 11. — P. 2519–2522. We report the one-step precipitation of CdS quantum dots in the volume of CdS-doped silicate glass under the focused femtosecond laser beam without additional heat treatment of glass. Femtosecond direct laser writing leads to the annular distribution of the precipitated CdS quantum dots in laser-written domain optical properties of which could be tuned by laser beam parameters. Increasing the laser pulse number to 103 significantly enhances luminescence intensity in the domains, while further increasing up to 106 pulses leads to luminescence quenching. A possible scenario for the formation and distribution of quantum dots is proposed. [ DOI ]

One-step micro-modification of optical properties in silver-doped zinc phosphate glasses by femtosecond direct laser writing / G. Y. Shakhgildyan, A. S. Lipatiev, M. P. Vetchinnikov et al. // Journal of Non-Crystalline Solids. — 2018. — Vol. 481. — P. 634–642. We demonstrate the possibility of joint formation of fluorescent silver clusters and plasmonic silver nanoparticles spatially confined in micron-sized domains by the one-step femtosecond direct laser writing (DLW) without subsequent heat treatment in zinc phosphate glasses with different concentration of silver. We show that DLW in glass induces local micro-modification of optical properties resulted in the appearance of luminescence, absorption and form birefringence in domains. Variation of laser pulse energy allows controlling the micro-modification process and tuning of optical properties. We propose a possible mechanism for observed phenomena that includes local chemical redistribution of glass network modifiers during DLW process. We believe that ability to form complex 3D shapes of luminescent, plasmonic and birefringent structures embedded in dielectric transparent glass materials opens new routes for the design of nanophotonic devices and multidimensional optical memory. [ DOI ]

Physicichemical, spectral-luminescent and lasing properties of yb-containing huntite-like glass / G. E. Malashkevich, V. V. Kouhar, A. A. Sukhodola et al. // American J. Computer Sci. and Inform. Technology. — 2018. — Vol. 6. — P. 50.

Radio- and photoluminescence properties of ce/tb co-doped glasses with huntite-like composition / R. Lorenzi, N. V. Golubev, M. Z. Ziyatdinova et al. // Optical Materials. — 2018. — Vol. 78. — P. 247–252.

Spectral-luminescent and laser properties of the (y1-x,ybx)2o3-al2o3-b2o3 glasses / G. E. Malashkevich, V. V. Kouhar, E. V. Pestryakov et al. // Optical Materials. — 2018. — Vol. 76. — P. 253–259.

Люминесценция стекол системы li2o-na2o-ga2o3-sio2-geo2 с заменой части ga2o3 на al2o3 / Н. В. Голубев, Е. С. Игнатьева, И. И. Диль, В. Н. Сигаев // Успехи в химии и химической технологии. — 2018. — Т. 32, № 2 (198). — С. 48–50.

Получение и свойства триботехнической керамики на основе нитрида кремния / И. О. Беляченков, Н. Е. Щеголева, А. С. Чайникова, Н. В. Голубев // Сборник тезисов докладов III Всероссийской научно-технической конференции "Высокотемпературные керамические композиционные материалы и защитные покрытия" (12 апреля 2018). — ВИАМ Москва, 2018. — С. 45–55.

Предельные концентрации оксидов, обеспечивающие получение стекла в щелочногаллиевосиликогерманатной системе / Н. В. Голубев, Е. С. Игнатьева, А. И. Ибатуллина и др. // Успехи в химии и химической технологии. — 2018. — Т. 32, № 2 (198). — С. 62–64.

Предельные концентрации оксидов, обеспечивающие получение стекла в щелочногаллиевосиликогерманатной системе / М. З. Зиятдинова, К. А. Уткин, Е. С. Игнатьева и др. // Успехи в химии и химической технологии. — 2018. — Т. 32, № 2 (198). — С. 74–76.

Augmented excitation cross section of gadolinium ions in nanostructured glasses / L. Roberto, P. Alberto, V. N. Sigaev et al. // Optics Letters. — 2017. — Vol. 42, no. 13. — P. 2419–2422.

Donor-acceptor control in grown-in-glass gallium oxide nanocrystals by crystallization-driven heterovalent doping / A. Paleari, N. V. Golubev, E. S. Ignat'eva et al. // Chemphyschem: a European journal of chemical physics and physical chemistry. — 2017. — Vol. 18, no. 6. — P. 662–669. [ DOI ]

Влияние модифицирующих и спекающих добавок на свойства нитридокремниевой керамики / И. О. Беляченков, Н. Е. Щеголева, А. С. Чайникова, Н. В. Голубев // Успехи в химии и химической технологии. — 2017. — Т. 31, № 3(184). — С. 16–18.

Влияние спекающей добавки на синтез, структуру и свойства оксинитрида алюминия / Д. А. Забелин, А. С. Чайникова, Н. Е. Щеголева и др. // Современные высокотемпературные волокнистые теплозвукоизоляционные материалы: материалы Всероссийской научно-технической конференции (7 декабря 2017). — ВИАМ Москва, 2017. — С. 83–92.

ОПРЕДЕЛЕНИЕ ДЛИТЕЛЬНОСТИ ПРЕДКРИСТАЛЛИЗАЦИОННОЙ ОБРАБОТКИ ГАЛЛИЕВОСИЛИКОГЕРМАНАТНЫХ СТЕКОЛ, АКТИВИРОВАННЫХ ni2 / Н. В. Голубев, Е. С. Игнатьева, В. Н. Сигаев, Е. О. Козлова // Успехи в химии и химической технологии. — 2017. — Т. 31, № 1 (182). — С. 65–66. Выявление оптимальных режимов термообработки люминесцирующих стеклокристаллических материалов - необходимый этап перед их применением. В настоящей работе изучено влияние предкристаллизационной обработки на эффективность нуклеации в малощелочных галлиевосиликогерманатных стеклах, активированных Ni2+. Установлено, что при 595ºС зародышеобразование практически завершается после 4-5 ч обработки.

Получение нитридокремниевой керамики методом горячего прессования / И. О. Беляченков, Н. Е. Щеголева, А. С. Чайникова, Н. В. Голубев // докладов Всероссийской научно-технической конференции Современные высокотемпературные волокнистые теплозвукоизоляционные материалы (7 декабря 2017). — ВИАМ Москва, 2017. — С. 31–40.

Синтез и исследование керамики на основе оксинитрида алюминия / Д. А. Забелин, А. С. Чайникова, Н. Е. Щеголева и др. // Успехи в химии и химической технологии. — 2017. — Т. 31, № 3. — С. 31–33.

Стекловолокно для регистрации ионизирующего излучения / М. З. Зиятдинова, Н. В. Голубев, В. Н. Сигаев и др. // III междисциплинарный молодежный форум с международным участием "Новые материалы". Москва. 21-24 ноября 2017 г. — ISBN 978-5-4465-1638-4, УДК 61.12, ББК 24.95, Н 85. — Сборник материалов. - М: ООО "Буки Веди", 2017. — С. 84–87.

Formation of luminescent and birefringent microregions in phosphate glass containing silver / A. S. Lipat’ev, G. Y. Shakhgil’dyan, T. O. Lipat’eva et al. // Glass and Ceramics. — 2016. — Vol. 73, no. 7-8. — P. 277–282. [ DOI ]

Lasing on huntite-like glass activated with yb3+ ions / G. E. MALASHKEVICH, V. V. KOUHAR, E. V. PESTRYAKOV et al. // Журнал прикладной спектроскопии. — 2016. — Vol. 83, no. 6-16. — P. 546–547. The lasing effect in glasses of the composition (mol.%) 2Yb2O3-8Y2O3-30Al2O3-60B2O3 has been demonstrated for the first time. The threshold of generation in weakly selective hemispherical resonator under laser diode pumping achieves about 1.5 W.

Spectroscopic properties of yttrium-aluminum-borate glasses activated by terbium and cerium ions / M. Z. Ziyatdinova, N. V. Golubev, E. S. Ignat'eva et al. // Glass and Ceramics. — 2016. — Vol. 72, no. 9-10. — P. 366–369. The Judd-Ofelt parameters are calculated for Tb3+ ions in yttrium-aluminum-borate glasses coactivated by Tb3+ and Ce3+ (X1) and activated solely by Tb3+ (X2). The following parameters are obtained: Omega(2) = 5.45 x 10 (-20), Omega(4) = 2.82 x 10 (-20), Omega(6) = 3.76 x 10 (-20) cm(2) for X1 and Omega(2) = 4.99 x 10 (-20), Omega(4) = 2.18 x 10 (-20), Omega(6) = 3.51 x 10 (-20) cm(2) for X2. It is shown that these glasses hold promise as a basis for the development of converters of UV-radiation into the green-yellow region of the spectrum. [ DOI ]

ВЛИЯНИЕ СОСТАВА АКТИВИРОВАННЫХ ИТТРИЙАЛЮМОБОРАТНЫХ СТЕКОЛ НА ИХ РЕНТГЕНОЛЮМИНЕСЦЕНЦИЮ / А. С. ШКУРАТКО, М. З. ЗИЯТДИНОВА, Н. В. ГОЛУБЕВ и др. // Успехи в химии и химической технологии. — 2016. — Т. 30, № 7 (176). — С. 132–134. Синтезированы стекла, близкие по составу к кристаллу YAl3(BO3)4 и соактивированные ионами Tb3+ и Ce3+. Показано, что интенсивность рентгенолюминесценции таких стекол зависит от присутствия оксида свинца и возрастает с повышением концентрации оксида тербия. Полученные стекла перспективны для создания двухкоординатных устройств визуализации радиационных изображений.

Влияние состава активированных иттрийалюмоборатных стекол на их рентгенолюминесценцию / А. С. Шкуратко, М. З. Зиятдинова, Н. В. Голубев и др. // Успехи в химии и хим. технологии: Сб. науч. тр. РХТУ им. Д.И. Менделеева. — 2016. — Т. 30, № 7. — С. 131–133.

КРИСТАЛЛИЗАЦИЯ ГАЛЛИЕВОСИЛИКОГЕРМАНАТНЫХ СТЕКОЛ С РАЗНЫМ ОТНОШЕНИЕМ me2o/ga2o3 / Е. О. Козлова, Н. В. Голубев, Е. С. Игнатьева и др. // Успехи в химии и химической технологии. — Т. 30 из 7 (176). — РХТУ им. Д.И. Менделеева Москва, 2016. — С. 47–49.

ОПРЕДЕЛЕНИЕ ТЕМПЕРАТУРЫ НУКЛЕАЦИИ СТЕКЛА КОРДИЕРИТОВОГО СОСТАВА С ДОБАВКОЙ tio2 / Е. С. Субботина, М. В. Воропаева, Е. С. Игнатьева и др. // Успехи в химии и химической технологии. — Т. 30 из 7 (176). — РХТУ им. Д.И. Менделеева Москва, 2016. — С. 113–114.

ФАЗОВЫЕ ПРЕВРАЩЕНИЯ В СТЕКЛЕ КОРДИЕРИТОВОГО СОСТАВА С ДОБАВКОЙ tio2 / Н. А. Рукавичкин, М. В. Воропаева, Е. С. Игнатьева и др. // Успехи в химии и химической технологии. — Т. 30 из 7 (176). — РХТУ им. Д.И. Менделеева Москва, 2016. — С. 98–100.

ФОРМИРОВАНИЕ ЛЮМИНЕСЦИРУЮЩИХ И ДВУЛУЧЕПРЕЛОМЛЯЮЩИХ МИКРООБЛАСТЕЙ В ФОСФАТНОМ СТЕКЛЕ, СОДЕРЖАЩЕМ СЕРЕБРО / А. С. Липатьев, Г. Ю. Шахгильдян, Т. О. Липатьева и др. // Стекло и керамика. — 2016. — Т. 8. — С. 3–9.

Diffusion-driven and size-dependent phase changes of gallium oxide nanocrystals in a glassy host / N. V. Golubev, E. S. Ignat'eva, V. N. Sigaev et al. // Physical Chemistry Chemical Physics. — 2015. — Vol. 17, no. 7. — P. 5141–5150.

Non-aqueous sol-gel synthesis of hybrid rare-earth-doped gamma-ga2o3 nanoparticles with multiple organic-inorganic-ionic light-emission features / R. Lorenzi, A. Paleari, N. V. Golubev et al. // Journal of Materials Chemistry С. — 2015. — Vol. 3, no. 1. — P. 41–45. We present a novel strategy for the synthesis of pure and Eu-doped gamma-Ga2O3 nanoparticles with an in situ organic capping resulting from a non-aqueous solution-based benzyl alcohol synthesis route. Photoluminescence spectroscopy highlights the concomitant benzoate-related and gamma-Ga2O3 exciton-like Eu3+ excitations in the UV, and a blue emission superimposed onto gamma-Ga2O3 donor-acceptor recombination, ascribable to organic moieties different from benzoate. [ DOI ]

Nucleation-controlled vacancy formation in light-emitting wide-band-gap oxide nanocrystals in glass / N. V. Golubev, E. S. Ignat'eva, V. N. Sigaev et al. // Journal of Materials Chemistry С. — 2015. — Vol. 3, no. 17. — P. 4380–4387. Light emission of nanocrystals (NCs) can depend not only on NC size but also - and even more importantly in wide-band-gap NCs - on the occurrence of optically active sites, such as donor-acceptor pairs (DAPs). Here, we demonstrate that controlling the thermo-chemical conditions of NC nucleation when NCs are forming in a solid host - an approach often used for driving NC size dispersion - can be an innovative strategy for tailoring DAP population. Our data show that light emission from DAP recombination and decay in defect sites can be controlled in gamma-Ga2O3 NCs in alkali-germanosilicate glass - a prototypal oxide-in-oxide nanostructured system - by oxygen and gallium vacancy formation during nucleation. Time-resolved UV-excited photoluminescence, combined with differential scanning calorimetry, X-ray diffraction, and transmission electron microscopy, reveal how nucleation pretreatment determines, besides NC size and concentration, also the DAP number via promotion of acceptor formation or their passivation during interaction with the host. The results envisage the possibility of nucleation-based design of light-emitting NCs in a wide range of oxide systems. [ DOI ]

АКТИВИРОВАННЫЕ ИОНАМИ ГАДОЛИНИЯ НАНОСТРУКТУРИРОВАННЫЕ СТЕКЛА СИСТЕМЫ li2o-na2o-ga2o3-sio2-geo2 / Е. С. Игнатьева, Н. В. Голубев, К. В. Деревяго и др. // Успехи в химии и химической технологии. — Т. 29 из 7 (166). — РХТУ им. Д.И. Менделеева, Москва, 2015. — С. 29–31.

Изучение начальной стадии кристаллизации стекла кордиеритового состава / М. В. Воропаева, Н. В. Голубев, Е. С. Игнатьева и др. // Сборник материалов XI международного конгресса молодых ученых по химии и химической технологии МКХТ-2015. — Т. 29 из 2. — РХТУ им. Д.И. Менделеева Москва, 2015. — С. 15–17.

Параметры Джадда-Офельта активированных tb3+ стекол системы y2o3-al2o3-b2o3 / М. З. Зиятдинова, Н. В. Голубев, Е. С. Игнатьева и др. // Успехи в химии и хим. технологии: Сб. науч. тр. РХТУ им. Д.И. Менделеева. — 2015. — Т. 29, № 7. — С. 26–28.

Рентгенолюминесценция иттрий-алюмоборатных стекол, соактивированных ионами редких земель / М. З. Зиятдинова, Н. В. Голубев, Г. Е. Малашкевич и др. // Успехи в химии и хим. технологии: Сб. науч. тр. РХТУ им. Д.И. Менделеева. — 2015. — Т. 29, № 7. — С. 23–25.

СПЕКТРОСКОПИЧЕСКИЕ СВОЙСТВА ИТТРИЙАЛЮМОБОРАТНЫХ СТЕКОЛ, АКТИВИРОВАННЫХ ИОНАМИ ТЕРБИЯ И ЦЕРИЯ / М. З. Зиятдинова, Н. В. Голубев, Е. С. Игнатьева и др. // Стекло и керамика. — 2015. — № 10. — С. 17–20.

Crystallization of nanoheterogeneities in ga-containing germanosilicate glass: Dielectric and refractive response changes / A. Paleari, V. N. Sigaev, N. V. Golubev et al. // Acta Materialia. — 2014. — Vol. 70. — P. 19–29.

Light-emitting ga-oxide nanocrystals in glass: a new paradigm for low-cost and robust uv-to-visible solar-blind converters and uv emitters / V. N. Sigaev, N. V. Golubev, E. S. Ignat'eva et al. // Nanoscale. — 2014. — Vol. 6, no. 3. — P. 1763–1774. [ DOI ]

Space-selective enhancement of blue photoluminescence in gallium germanosilicate glass through laser-induced nanostructuring / S. V. Lotarev, A. S. Lipatiev, N. V. Golubev et al. // Materials Letters. — 2014. — Vol. 122. — P. 174–177. Crystalline gallium oxide is known to possess UV-excited blue photoluminescence together with one of the widest band gaps among transparent conducting oxides, with a transmittance range extending from the visible to the near-UV range, thus making it a promising material for efficient solar-blind UV-to-visible converters. In the present paper, we report for the first time laser-induced space-selective precipitation of gamma-Ga2O3 nanosized crystals in alkali gallium germanosilicate glass using a sum frequency beam (271 nm) of a copper vapor laser. At the glass surface, the laser writing process generates transparent nanostructured channels which emit broadband blue photoluminescence (centered at about 460 nm) under UV exposure, with excitation efficiency peaked at about 260 nm. Only much weaker blue photoluminescence can instead be observed in the starting non-irradiated glass from the precursor stage of the nanocrystallization. Spectral properties of light emission in the nanocrystallized regions are similar to those of earlier studied bulk nanostructured material produced from the same composition by heat treatment. Laser-written photoluminescent patterns in the studied glass provide advanced opportunities for developing novel solar-blind UV detectors. (C) 2014 Elsevier B.V. All rights reserved. [ DOI ]

Синтез и оптические свойства иттрий-алюмоборатных стекол, соактивированных редкими землями / М. З. Зиятдинова, Н. В. Голубев, В. Н. Сигаев, Г. Е. Малашкевич // Успехи в химии и хим. технологии: Сб. науч. тр. РХТУ им. Д.И. Менделеева. — 2014. — Т. 28, № 8. — С. 50–53.

Broadband infrared light-emitting patterns in optical glass by laser-induced nanostructuring of nio-doped alkali-gallium germanosilicates / S. V. Lotarev, A. S. Lipatiev, N. V. Golubev et al. // Optics Letters. — 2013. — Vol. 38, no. 4. — P. 492–494. In this Letter, we show functionalization of NiO-doped 7.5Li2O · 2.5Na2O · 20Ga2O2 · 35SiO2 · 35GeO2 glass by space-selective nanocrystallization via exposure to the focused beam of a pulsed copper vapor laser (510.6 and 578.2 nm) at temperature close to the glass transition point (570oC). Irradiated areas drastically change their color, caused by electronic transitions of Ni2+ dopant ions, without any alteration of the optical quality. Importantly, irradiated regions acquire broadband infrared luminescence (centered at about 1400 nm and possessing 400 nm effective bandwidth) typical of Ni2+ ions in crystalline environment, and by positive change of refractive index (more than 10-3). Spectroscopic and diffractometric data of the irradiated regions indeed resemble those previously observed in thermally nanocrystallized glass, with Ni2+ ions embedded in γ-Ga2O3 nanocrystals. The results demonstrate the possibility of laser writing nanocrystallized multifunction patterns in germanosilicate glasses for the fabrication of active integrated devices. © 2013 Optical Society of America. [ DOI ]

Broadband luminescence in nanostructured glasses / N. V. Golubev, E. S. Ignat'eva, R. Lorenzi et al. // Glass and Ceramics. — 2013. — Vol. 70, no. 3-4. — P. 124–129. The mechanism of broadband near-IR luminescence in the process of nanostructuring of Ni2+-activated glasses in the system R2O-Ga2O3-SiO2-GeO2 (R = Li, Na) at the initial stage of phase separation is described. [ DOI ]

Local crystallization of glasses aided by copper vapor laser / S. V. Lotarev, A. S. Lipat'ev, N. V. Golubev et al. // Glass and Ceramics. — 2013. — Vol. 70, no. 3-4. — P. 130–134. It is shown that a copper vapor laser can be used effectively for local crystallization of glasses with precipitation of active phases on a surface or in the interior volume of glass depending on its composition. Aprocedure is proposed for using a laser beam to form nanostructural waveguides with broadband near-IR luminescence peaking at 1300 - 1450 nm in glass with composition (mol.%) 7.5 Li2O, 2.5 Na2O, 20 Ga2O3, 35 GeO3 and 35 SiO2 doped with 0.1 - 0.5% NiO. A mechanism of self-limited laser heating, impeding subsequent growth of the nanocrystals formed, is demonstrated. The results of the investigations are of interest for developing active elements of integrated optics. [ DOI ]

Native amorphous nanoheterogeneity in gallium germanosilicates as a tool for driving ga2o3 nanocrystal formation in glass for optical devices / V. N. Sigaev, N. V. Golubev, E. S. Ignat'eva et al. // Nanoscale. — 2013. — Vol. 5, no. 1. — P. 299–306. [ DOI ]

Oscillator strengths of absorption transitions from the 5 d 0 state in huntite-like eual3(bo3)4 polycrystals / G. E. Malashkevich, A. A. Kornienko, E. B. Dunina et al. // Journal of Applied Spectroscopy. — 2013. — Vol. 80, no. 4. — P. 536–541. [ DOI ]

Structure of low-silica glasses in the k2o-nb2o5-sio2 system / P. D. Sarkisov, A. Paleari, V. N. Sigaev et al. // Theoretical Foundations of Chemical Engineering. — 2013. — Vol. 47, no. 1. — P. 1–9. The nanostructure and nonlinear optical properties of high-niobium glasses in the (1 - x)KNbO3-xSiO(2) system with an SiO2 content x = 0.05-0.35 have been studied by small-angle neutron scattering (SANS), electron microscopy (EM), and second-optical-harmonic generation (SHG). Vitreous samples are manufactured by the methods of fast melt cooling (pressing with metal plates and quenching between rotating rolls). Glasses with x < 0.12 have been established to form a micro-inhomogeneous structure in the form of silica-enriched regions at the cooling rates used. According to SANS data, quenched glasses with x > 0.2 are homogeneous, but form a silica-enriched nanostructure after thermal treatments. At temperatures below similar to T (g) + 50A degrees C, silica-enriched regions manifest a very slight tendency to grow, whereas, according to SANS and X-ray diffraction data, their chemical composition is observed to shift appreciably towards SiO2 with thermal treatment. The obtained data on an inhomogeneous structure allows us to clarify the complicated character of the previously revealed dependence T (g) (x). Nano-inhomogeneous transparent samples produce a weak SHG signal, which indicates the quasi-periodic modulation of the chemical composition and, correspondingly, polarizability, in the volume of glass. The nonlinear optical phase KNbO3 precipitates at later stages of crystallization, when a glass loses its transparency. In this case, the SHG signal is amplified by several orders of magnitude. [ DOI ]

ЛОКАЛЬНАЯ КРИСТАЛЛИЗАЦИЯ СТЕКОЛ С ПОМОЩЬЮ ЛАЗЕРА НА ПАРАХ МЕДИ / С. В. Лотарев, А. С. Липатьев, Н. В. Голубев и др. // Стекло и керамика. — 2013. — № 4. — С. 21–25.

Наноструктуры с широкополосной ИК-люминесценцией, сформированные лазерным излучением / С. В. Лотарев, А. С. Липатьев, Н. В. Голубев и др. // научных трудов IV конгресса физиков Беларуси. — Ковчег Минск, 2013. — С. 243–244.

Оксидное стекло с большим минимальным расстоянием между редкоземельными активаторами / Г. Е. Малашкевич, Н. В. Голубев, Е. Х. Мамаджанова и др. // научных трудов IV конгресса физиков Беларуси. — Ковчег Минск, 2013. — С. 86–87.

Оксидное стекло с минимальным расстоянием 0,67 нм между редкоземельными активаторами / Г. Е. Малашкевич, Н. В. Голубев, Е. Х. Мамаджанова и др. // Стекло и керамика. — 2013. — № 4. — С. 33–34.

Зиятдинова М. З., Голубев Н. В., Сигаев В. Н. Процессы в шихте при варке стекла близкого по составу хантитоподобному кристаллу yal3(bo3)4 // Успехи в химии и хим. технологии: Сб. науч. тр. РХТУ им. Д.И. Менделеева. — 2013. — Т. 27, № 5. — С. 34–39.

Игнатьева Е. C., Голубев Н. В., Сигаев В. Н. Фазовое разделение активированных ni2+ стекол системы r2o-ga2o3-sio2-geo2 (r2o // научных трудов Успехи в химии и химической технологии. — Т. 27. — 2013. — С. 44–48.

Формирование с помощью лазерного излучения наноструктур в галлиевогерманосиликатных стеклах, люминесцирующих в синей области спектра / А. С. Липатьев, С. В. Лотарев, Н. В. Голубев и др. // научных трудов Успехи в химии и химической технологии. — Т. 27. — 2013. — С. 61–68.

ШИРОКОПОЛОСНАЯ ЛЮМИНЕСЦЕНЦИЯ В НАНОСТРУКТУРИРОВАННЫХ СТЕКЛАХ / Н. В. Голубев, Е. С. Игнатьева, Р. Лоренци и др. // Стекло и керамика. — 2013. — № 4. — С. 14–20.

Microfluorescence analysis of nanostructuring inhomogeneity in optical fibers with embedded gallium oxide nanocrystals / V. M. Mashinsky, N. M. Karatun, V. A. Bogatyrev et al. // Microscopy and Microanalysis. — 2012. — Vol. 18, no. 2. — P. 259–265. A spectroscopic protocol is proposed to implement confocal microfluorescence imaging to the analysis of microinhomogeneity in the nanocrystallization of the core of fibers belonging to a new kind of broadband fiber amplifier based on glass with embedded nanocrystals. Nanocrystallization, crucial for achieving an adequate light emission efficiency of transition metal ions in these materials, has to be as homogeneous as possible in the fiber to assure optical amplification. This requirement calls for a sensitive method for monitoring nanostructuring in oxide glasses. Here we show that mapping microfluorescence excited at 633 nm by a He-Ne laser may give a useful tool in this regard, thanks to quasi-resonant excitation of coordination defects typical of germanosilicate materials, such as nonbridging oxygens and charged Ge-O-Ge sites, whose fluorescence are shown to undergo spectral modifications when nanocrystals form into the glass. The method has been positively checked on prototypes of optical fibers-preventively characterized by means of scanning electron microscopy and energy dispersive spectroscopy-fabricated from preforms of Ni-doped Li2O-Na2O-Sb2O3-Ga2O3-GeO2-SiO2 glass in silica cladding and subjected to heat treatment to activate gallium oxide nanocrystal growth. The method indeed enables not only the mapping of the crystallization degree but also the identification of drawing-induced defects in the fiber cladding. [ DOI ]

Nickel-assisted growth and selective doping of spinel-like gallium oxide nanocrystals in germano-silicate glasses for infrared broadband light emission / V. N. Sigaev, N. V. Golubev, E. S. Ignat’eva et al. // Nanotechnology. — 2012. — Vol. 23, no. 1. — P. 015708. [ DOI ]

Nano-heterogeneous structure of (1-x)knbo3-xsio(2) glasses in the low glass-forming oxide content range 0.05 <= x <= 0.3 / V. N. Sigaev, S. V. Lotarev, V. S. Ryzhenkov et al. // Journal of Non-Crystalline Solids. — 2011. — Vol. 357, no. 16-17. — P. 3136–3142. Glasses with a high content of niobium oxide are of significant interest for electro-optics and nonlinear optics. In the present paper we report the results of the investigation of the submicroscopic structure and nonlinear optical properties of (1-x)KNbO3-xSiO(2) (KNS) glasses (x = 0.05-0.30) by XRD. SANS, electron microscopy and second harmonic generation (SHG) technique. Vitreous samples were fabricated by rapid melt cooling, via pressing the melt by steel plates, quenching between rotating metal rolls Or splat cooling in air or nitrogen flow. Glasses with x<0.15 are shown to possess a micro-inhomogeneous structure with regions enriched by SiO2. On the contrary, as-quenched glasses with x>0.15 arc found by SANS to be homogeneous, but form nanostructures enriched by SiO2 after heat-treatment. At temperatures below similar to(T-g + 50 degrees C), SiO2-enriched regions grow slightly, whereas their chemical composition shifts considerably closer to SiO2. The data on the nano-inhomogeneous structure enables clarifying the complicated T-g(x) dependence of KNS glasses. SHG-active KNbO3 phase precipitates at later stages of crystallization when the glass starts to lose its transparency. and crystallization of perovskite-like KNbO3 is accompanied by the enhancement of SHG efficiency by several orders of magnitude. (C) 2011 Elsevier B.V. All rights reserved. [ DOI ]

Borogermanate glasses with a high terbium oxide content / V. I. Savinkov, V. N. Sigaev, N. V. Golubev et al. // Journal of Non-Crystalline Solids. — 2010. — Vol. 356, no. 33-34. — P. 1655–1659. Glasses in Tb2O3-B2O3-GeO 2 (TBG) system with high, up to 33 mol% Tb2O3 content, have been obtained, and their crystallization behavior, spectral and magneto-optical properties studied. It was found that Verdet constant V of TBG glasses for wavelength 632.8 nm reached very high values: more than 0.4 arc min/cm Oe. Transparent and colorless TBG glasses with low absorption coefficient a for working wavelength 1.064 μm were prepared by varying redox conditions of melting. It provided high magneto-optical figure of merit V/a exceeding the same option of industrial glasses. The melt temperature of TBG glasses obtained did not exceed 1450 oC. This temperature is much lower than that of silicate magneto-optical glasses, promoting homogeneity of glass melt and facilitating production of TBG optical quality glasses. The observed correlation between the Verdet constant and Tb3+ content indicates that the Borrelli’s approach, explaining magneto-optical activity in glasses only by paramagnetic ion content, extends also to high concentrated rare earth oxide glasses. © 2010 Elsevier B.V. All rights reserved. [ DOI ]

Glasses and their crystallization in the (1-x)knbo3 center dot xsio(2) system at low glass-forming oxide contents, 0 <= x <= 0.35 / V. N. Sigaev, V. S. Ryzhenkov, S. V. Lotarev et al. // Journal of Non-Crystalline Solids. — 2010. — Vol. 356, no. 20-22. — P. 958–965. Glasses based on the K2O-Nb2O5-SiO2 system have been a subject of numerous studies thanks to promising electro-optical and non-linear optical properties. Most of the studies of Nb-containing glasses deal with compositions including not less than 40 mol% of SiO2 or B2O3. In the present work, we studied glass-forming and crystallization properties of (1 - x)KNbO3 center dot xSiO(2) glasses with x varying from 0 to 35 mol% by melt quenching between steel plates or by exposure to air or nitrogen flow. Thin transparent glassy plates can be obtained by quenching via pressing between metal plates for glasses with x >= 0.12, and transparent glass-ceramics allowing a remarkable second harmonic generation (SHG) response can be formed by heat-treatment near the first exothermic differential thermal analysis (DTA) peak over a wide range of glass compositions. It is shown that in these glasses, the crystalline K4Nb6O17 phase and a small amount of ferroelectric KNbO3, along with ceolite-like, cristobalite and alpha-quartz SiO2 phases precipitate at low temperatures in the range between the glass transition point, T-g, and the first exothermic peak on DTA curve, whereas ferroelectric KNbO3 precipitates at temperatures above 800 degrees C. Ferroelectric crystals which precipitate in the glass bulk are shown to produce high SHG activity. (C) 2010 Elsevier B.V. All rights reserved. [ DOI ]

Nickel-doped gallium-containing glasses luminescent in the near-infrared spectral range / N. V. Golubev, V. I. Savinkov, E. S. Ignat'eva et al. // Glass Physics and Chemistry. — 2010. — Vol. 36, no. 6. — P. 657–662. The heat treatment of glasses synthesized in the M(2)O-Ga(2)O(3)-GeO(2)-SiO(2) (M = Li, Na, K) system results in bulk precipitation of Ga(2)O(3) and LiGa(5)O(8) nanocrystals and, consequently, in luminescence within the bands with maxima at wavelengths of 1500 and 1300 nm, respectively, with the half-width exceeding 300 nm. In their spectral luminescence properties, the gallium germanium silicate glasses synthesized are similar to the gallium silicate glasses. However, the melting temperature of the former glasses is approximately 100 degrees C lower, which considerably facilitates the preparation of glasses of high optical quality. [ DOI ]

Structure of lanthanum-borogermanate glass with stillwellite composition according to vibrational spectroscopy data / V. N. Sigaev, S. V. Lotarev, E. V. Orlova et al. // Glass and Ceramics (English translation of Steklo i Keramika). — 2010. — Vol. 67, no. 3-4. — P. 105–108. Dielectric IR spectroscopy and Raman scattering (RS) spectroscopy have been used to confirm the presence in the structure of lanthanum-borogermanate (LBG) glass of triply coordinated boron atoms which are absent in a LaBGe 5 crystal. The grouping ratio [BO 3]/[BO 4] is independent of the conditions under which the glass is obtained. It is proposed that amorphous nanosize regions of two types with approximately the same chemical composition but different structure are present in the glass. Regions of the first kind contain predominately quadruply coordinated boron atoms and are the basis for the formation of nuclei of stillwellite crystals, while regions of the second kind are more disordered, and a large fraction of the boron atoms in them lie at centers of oxygen triangles. © 2010 Springer Science+Business Media, Inc. [ DOI ]

Активированные никелем галлийсодержащие стекла, люминесцирующие в ближнем ИК диапазоне спектра / Н. В. Голубев, В. И. Савинков, Е. С. Игнатьева и др. // Физика и химия стекла. — 2010. — Т. 36, № 6. — С. 835–842.

Low silica k 2o - nb 2o 5 - sio 2 nonlinear optical glasses / V. N. Sigaev, V. S. Ryzhenkov, N. V. Golubev et al. // Glass and Ceramics (English translation of Steklo i Keramika). — 2009. — Vol. 66, no. 7-8. — P. 233–235. Glasses with the compositions (100 – x)KNbO3 – xSiO2 (x = 12 – 35), forming a transparent glass ceramic when heat-treated in the glass formation temperature range, have been obtained. The initial stages of phase separation are accompanied by the appearance of appreciable quadratic optical nonlinearity in the glasses. This nonlinearity can be used to develop high-efficiency electro-optic modulators by thermal poling. [ DOI ]

Нелинейно-оптические стекла системы К2o-nb2o5-sio2 с низким содержанием кремнезема / В. Н. Сигаев, В. С. Рыженков, Н. В. Голубев и др. // Стекло и керамика. — 2009. — № 7. — С. 3–5.

Langmuir-blodgett composite films for the selective determination of calcium in aqueous solutions / M. A. Kalinina, O. A. Raitman, D. S. Turygin et al. // Russian Journal of Physical Chemistry A. — 2008. — Vol. 82, no. 8. — P. 1334–1342. [ DOI ]

Nanosized structural transformation and nonlinear optical properties of lithium niobium germanate glasses / N. V. Golubev, V. N. Sigaev, S. Y. Stefanovich et al. // Journal of Non-Crystalline Solids. — 2008. — Vol. 354, no. 17. — P. 1909–1914. Glass formation in Li2O-Nb2O5-GeO2 (LNG) system, the structure and crystallization behavior of glasses that have compositions near the ratio Li2O/Nb2O5 similar to 1 corresponding to stoichiometry of ferroelectric phase LiNbO3 were examined by differential thermal analysis, X-ray diffraction, small-angle neutron scattering and second harmonic generation (SHG). LNG glasses were subjected to heat treatments at temperatures in the range between T-g and temperature of the first exothermic peak in order to initiate nonlinear optical activity by nanoheterogeneity formation. Transparent nanostructured glasses with second-order optical nonlinearity were obtained for compositions characterized by the Li2O/Nb2O5 molar ratio ranging from 0.83 to 1.2 and GeO2 40-45 mol%. As prolonged heat treatments of nanostructured glasses result in crystallization of ferroelectric LiNbO3 the origin of SHG in transparent LNG glasses is supposed to be connected predominantly with polarity of nanoheterogeneities formed at the initial stage of phase separation. (C) 2007 Elsevier B.V. All rights reserved. [ DOI ]

Second-order optical non-linearity initiated in li2o-nb2o5-sio2 and li2o-zno-nb2o5-sio2 glasses by formation of polar and centrosymmetric nano structures / V. N. Sigaev, N. V. Golubev, S. Y. Stefanovich et al. // Journal of Non-Crystalline Solids. — 2008. — Vol. 354, no. 10-11. — P. 873–881. Amorphous nanoheterogeneities of the size less than 100 angstrom have been formed in glasses of the Li2O-Nb2O5-SiO2 (LNS) and Li2O-ZnO-Nb2O5-SiO2 (LZNS) systems at the initial stage of phase separation and examined by transmission electron microscopy, small-angle X-ray and neutron scattering. Both LNS and LZNS nanoheterogeneous glasses exhibit second harmonic generation (SHG) even when they are characterized by fully amorphous X-ray diffraction (XRD) patterns. Chemical differentiation and ordering of glass structure during heat treatments at appropriate temperatures higher T-g lead to drastic increase of SHG efficiency of LNS glasses contrary to LZNS ones in the frame of amorphous state of samples. Following heat treatments of nanostructured glasses result in crystallization of ferroelectric LiNbO3 and non-polar LiZnNbO4 in the LNS and LZNS glasses, respectively. Taking into account similar polarizability of atoms in LNS and LZNS glasses, the origin of the principal difference in the second-order optical non-linearity of amorphous LNS and LZNS samples is proposed to connect predominantly with the internal structure of formed nanoheterogeneities and with their polarity. Most probably, amorphous nanoheterogencities in glasses may be characterized with crystal-like structure of polar (LiNbO3) phase initiating remarkable SHG efficiency or non-polar (LiZnNbO4) phase, which do not initiate SHG activity. It gives an opportunity to vary SHG efficiency of glasses in a wide rage without remarkable change of their transparency by chemical differentiation process at the initial stage of phase separation when growth of nanoheterogeneities is 'frozen'. At higher temperatures, LiNbO3 crystals identified by XRD precipitate in LNS glasses initiating even more increase of SHG efficiency but visually observable transparency is impaired. (C) 2007 Elsevier B.V. All rights reserved. [ DOI ]

КОМПОЗИТНЫЕ ПЛЕНКИ ЛЕНГМЮРА–БЛОДЖЕТТ ДЛЯ СЕЛЕКТИВНОГО ОПРЕДЕЛЕНИЯ КАЛЬЦИЯ В ВОДНЫХ РАСТВОРАХ / М. А. Калинина, О. А. Райтман, Д. С. Турыгин и др. // Журнал физической химии. — 2008. — Т. 82. — С. 1501–1510. [ DOI ]

О природе оптической нелинейности второго порядка нанонеоднородных стекол системы li2o-nb2o5-sio2 / В. Н. 487 Сигаев, Н. В. Голубев, Л. З. Усманова и др. // Физика и химия стекла. — 2007. — Т. 33, № 2. — С. 137–148.

A novel ultra-sensing composed langmuir–blodgett membrane for selective calcium determination in aqueous solutions / M. A. Kalinina, N. V. Golubev, O. A. Raitman et al. // Sensor and Actuators B. — 2006. — Vol. 114, no. 1. — P. 19–27.

A novel ultra-sensing composed langmuir–blodgett membrane for selective calcium determination in aqueous solutions / M. A. Kalinina, N. V. Golubev, O. A. Raitman et al. // Sensors and Actuators, B: Chemical. — 2006. — Vol. 114, no. 1. — P. 19–27. [ DOI ]

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