Персона: Набиев, Игорь Руфаилович
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Инженерно-физический институт биомедицины
Цель ИФИБ и стратегия развития – это подготовка высококвалифицированных кадров на базе передовых исследований и разработок новых перспективных методов и материалов в области инженерно-физической биомедицины. Занятие лидерских позиций в биомедицинских технологиях XXI века и внедрение их в образовательный процесс, что отвечает решению практикоориентированной задачи мирового уровня – диагностике и терапии на клеточном уровне социально-значимых заболеваний человека.
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Игорь Руфаилович
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- ПубликацияОткрытый доступМногослойные полимерные капсулы для адресной доставки противоопухолевых соединений(2024) Калениченко, Д. В.; Нифонтова, Г. О.; Крюкова, И. С.; Суханова, А.; Набиев, И.; Набиев, Игорь Руфаилович; Крюкова, Ирина Сергеевна; Калениченко, Дарья ВладимировнаРазработка систем контролируемой адресной доставки препаратов для персонализированной терапии рака является одной из важнейших задач современной медицины. Контролируемые доставка и высвобождение противоопухолевых препаратов обеспечивают снижение их токсичности для нормальных клеток организма человека и уменьшают побочные эффекты терапии рака. Многослойные полимерные капсулы (МПК) являются перспективными потенциальными кандидатами для разработки систем доставки на их основе. МПК получают с помощью послойной адсорбции противоположно заряженных полиэлектролитов на поверхности заряженного микросубстрата сферической формы. Данный метод позволяет получать МПК различной структуры, функционализировать их противоопухолевыми агентами и направляющими биомолекулами для их адресной доставки к опухоли. В представленной работе описаны основные этапы получения МПК, а также проанализированы факторы, влияющие на эффективность загрузки в МПК противоопухолевого препарата доксорубицина с помощью метода пассивной диффузии.
- ПубликацияОткрытый доступНАБОР ДЛЯ ПРОВЕДЕНИЯ ФОТОДИНАМИЧЕСКОЙ ТЕРАПИИ(НИЯУ МИФИ, 2021) Соколов, П. М.; Набиев, И. Р.; Нифонтова, Г. О.; Соколов, Павел Михайлович; Набиев, Игорь Руфаилович; Нифонтова, Галина ОлеговнаИзобретение относится к области медицинских исследований и предназначено для снижения токсичности фотосенсибилизаторов. Раскрыт набор для проведения фотодинамической терапии, включающий активный компонент, состоящий из одной или более микрокапсул, содержащих внутри одну или более молекул гасителя, а также одну или более молекул фотосенсибилизатора, на внешней поверхности микрокапсул и молекулах фотосенсибилизатора иммобилизованы однодоменные антитела, при этом оболочка микрокапсулы выполнена из гибридного светочувствительного материала, который способен разрушаться оптическим излучением, причем спектр излучения, вызывающий активацию фотосенсибилизатора совпадает со спектром излучения, который вызывает разрушение оболочки микрокапсул. Набор также включает вспомогательный компонент, состоящий из одной или более квантовых точек, объединенных с одной или более биологической распознающей молекулой, причем спектр флуоресценции квантовых точек находится в оптическом диапазоне, вызывающем активацию молекул фотосенсибилизатора и разрушение оболочки микрокапсул, при этом биологические распознающие молекулы и однодоменные антитела способны специфически связывать различные эпитопы онкомаркеров, экспрессируемых на поверхности опухолевых клеток, разрушение которых необходимо произвести. Изобретение обеспечивает снижение теневой токсичности фотосенсибилизаторов и специфическую доставку к опухолевым клеткам, что позволяет достигнуть высокой эффективности и безопасности терапии. 6 з.п. ф-лы, 1 пр., 1 ил.
- ПубликацияТолько метаданныеStimulus-Sensitive Theranostic Delivery Systems Based on Microcapsules Encoded with Quantum Dots and Magnetic Nanoparticles(2020) Ramos-Gomes, F.; Alves, F.; Sukhanova, A.; Nifontova, G.; Nabiev, I.; Нифонтова, Галина Олеговна; Набиев, Игорь РуфаиловичFluorescent semiconductor nanocrystals, known as quantum dots (QDs), and magnetic nanoparticles (MNPs) are extensively studied perspective tools for optical (fluorescence) and magnetic resonance imaging techniques. The unique optical properties, high photostability, and bright luminescence of QDs make them more promising fluorophores than the classical organic dyes. Encoding polyelectrolyte microcapsules with QDs and MNPs ensures their sensitivity to both photoexcitation and magnetic field. This chapter presents the protocol for obtaining a stimulus-sensitive delivery system based on QD- and MNP-encoded polyelectrolyte microcapsules by means of layer-by-layer self-assembly. The resultant fluorescent magnetic polyelectrolyte microcapsules are 3.4-5.5 μm in size, have a hollow structure, and are brightly fluorescent to be detected with the standard imaging equipment. Polyelectrolyte microcapsule surface bears functional groups for subsequent functionalization with vector capture molecules. The polyelectrolyte microcapsules containing combination of QDs and MNPs are advanced visualization tools, since they can be sorted in a magnetic field and at the same time are suitable for fluorescent imaging what can be applied within a wide range of diagnostic and therapeutic protocols.
- ПубликацияТолько метаданныеEffect of Spectral Overlap and Separation Distance on Exciton and Biexciton Quantum Yields and Radiative and Nonradiative Recombination Rates in Quantum Dots Near Plasmon Nanoparticles(2020) Krivenkov, V.; Dyagileva, D.; Samokhvalov, P.; Nabiev, I.; Rakovich, Y.; Самохвалов, Павел Сергеевич; Набиев, Игорь Руфаилович© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimEfficient biexciton (BX) photoluminescence (PL) from quantum dots (QDs) paves the way to the generation of entangled photons and related applications. However, the quantum yield (QY) of BX PL is much lower than that for single excitons (EX) due to efficient Auger-like recombination. In the vicinity of plasmon nanoparticles, the recombination rates of EX and BX may be affected by the Purcell effect, fluorescence quenching, and the excitation rate enhancement. Here, the effect of the plasmon resonance spectral position on the EX and BX PL is experimentally studied in two cases: when the plasmon band overlaps with the excitation wavelength and when it coincides with the QDs PL band. In the first case, the EX and BX excitation efficiencies are significantly increased but the EX QY reduced. As a result, the BX-to-EX QY ratio is higher than 1 at plasmon–exciton systems separations shorter than 40 nm. In the second case, the radiative recombination rates are enhanced by several orders of magnitude, which led to an increase in BX QY over distances of up to 90 nm. Finally, these two effects are obtained in the same hybrid structure, with the resultant increase in both excitation efficiency and QY of BX PL.
- ПубликацияТолько метаданныеWeak Coupling between Light and Matter in Photonic Crystals Based on Porous Silicon Responsible for the Enhancement of Fluorescence of Quantum Dots under Two-Photon Excitation(2020) Kriukova, I. S.; Krivenkov, V. A.; Samokhvalov, P. S.; Nabiev, I. R.; Крюкова, Ирина Сергеевна; Самохвалов, Павел Сергеевич; Набиев, Игорь Руфаилович© 2020, Pleiades Publishing, Inc.The development of optical and, in particular, photoluminescent sensors is currently becoming more and more significant because of their universality, selectivity, and high sensitivity ensuring their wide applications in practice. The efficiency of existing photoluminescent sensors can be increased by using photoluminescent nanomaterials and hybrid nanostructures. For biological applications of photoluminescent sensors, it is extremely relevant to excite photoluminescence in the near infrared spectral range, which allows excluding the effect of autofluorescence of biomolecules and ensuring a deeper penetration of radiation into biological tissues. In this work, it has been studied how the spectral and kinetic parameters of photoluminescence change under two-photon excitation of semiconductor quantum dots incorporated into a one-dimensional photonic crystal, a porous silicon microcavity. It has been shown that the formation of a weak coupling between an exciton transition in quantum dots and an eigenmode of the microcavity enhances the photoluminescence of quantum dots. It is important that quantum dots placed in the porous silicon matrix hold a sufficiently large cross section for two-photon absorption, which makes it possible to efficiently excite their exciton states up to saturation without reaching powers leading to the photothermic destruction of the structure of porous silicon and to the disappearance of the weak coupling effect. It has been demonstrated that the radiative recombination rate under the two-photon excitation of the system consisting of quantum dots and the microcavity increases by a factor of 4.3; it has been shown that this increase is due to the Purcell effect. Thus, fabricated microcavities based on 1D porous silicon crystals allow controlling the quantum yield of photoluminescence of quantum dots under two-photon excitation, which opens prospects for the development of new photoluminescent sensors based on quantum dots operating in the near infrared spectral range.
- ПубликацияТолько метаданныеLong-range coupling of individual quantum dots with plasmonic nanoparticles in a thin-film hybrid material(2020) Rakovich, Y. P.; Dyagileva, D. V.; Krivenkov, V. A.; Samokhvalov, P. S.; Nabiev, I. R.; Самохвалов, Павел Сергеевич; Набиев, Игорь Руфаилович© 2020 SPIE.Semiconductor quantum dots (QDs) are widely used in photovoltaic and optoelectronic devices due to their unique optical properties. Photoluminescence (PL) properties of QDs can be significantly improved by their electromagnetic coupling with plasmonic nanoparticles (PNPs). The excitation of resonant localized plasmon modes leads to the enhancement of the density of photon states and increase of electromagnetic field near the surface of PNPs, what boosts the acceleration of the exciton radiative decay, known as the Purcell effect. To study the dependence of the degree of acceleration of radiative decay rate (Purcell factor) on the distance between QDs and PNPs, we fabricated thin-film hybrid structures based on CdSe(core)/ZnS/CdS/ZnS(multishell) QDs and silver or gold PNPs with a controllable distance between these components. The change in the radiative decay rate of excitons was calculated from the PL intensities and lifetimes before and after the deposition of PNPs on top of the QD thin film covered by a poly(methyl methacrylate) (PMMA) spacer. For both PNP types, the PL lifetime of underlying QDs decreased, whereas the PL intensity of the latter decreased only slightly for gold PNPs and even increased for silver PNPs. This indicates the acceleration of QDs radiative decay (Purcell effect) mediated by exciton-plasmon interaction. The Purcell factor was higher for silver PNPs than that for gold PNPs, what can be explained by the better spectral overlap between the QDs PL band and silver PNPs absorbance and the absence of interband absorption in silver at the wavelength of QDs PL. The results of this study provide better understanding of the Purcell effects in hybrid materials based on QDs and PNPs.
- ПубликацияТолько метаданныеStrong coupling effects in a plexciton system of gold nanostars and J-aggregates(2022) Melnikau, D.; Sanchez-Iglesias, A.; Grzelczak, M.; Rakovich, Y. P.; Samokhvalov, P.; Nabiev, I.; Самохвалов, Павел Сергеевич; Набиев, Игорь Руфаилович© 2021Strong exciton–plasmon interaction enables effective control of the photonic properties of hybrid organic–inorganic nanostructures encompassing light absorption, scattering and luminescence. Whereas the manifestations of light-matter interactions in the absorption and scattering are reasonably well understood their relation to the luminescence as well as luminescence properties themselves in strongly coupled plexcitonic hybrids is still largely underexplored especially for a system with a complex mechanism of hybridisation of states. Here we report on investigation of the interaction between localized and hybridized plasmons in gold nanostars and excitons in J-aggregates under ambient conditions. Our findings demonstrate the quality performance of the formed plexciton system with multiple hybridization channels in terms of the parameters of strong coupling, such as Rabi splitting (230 meV), coupling-strength-to-transition energy ratio (0.07), and cooperativity (2.03). The results of time-resolved experiments elucidate the observed enhanced spontaneous emission rate with regard to the Purcell effect, whose value was estimated from the extinction spectra of the strongly coupled plexciton system.
- ПубликацияТолько метаданныеPolariton-assisted emission of strongly coupled organic dye excitons in a tunable optical microcavity(2019) Mochalov, K.; Dovzhenko, D.; Vaskan, I.; Kryukova, I.; Rakovich, Y.; Nabiev, I.; Крюкова, Ирина Сергеевна; Набиев, Игорь Руфаилович© 2019 SPIE.Light-matter coupling between the molecular dipole transitions and a confined electromagnetic field provides the ability to control the fundamental properties of coupled matter. The use of tunable optical microcavities for electromagnetic field confinement allows one to affect the coupled state properties in a controllable manner, whereas the coupling strength in this system strongly depends on the transition dipole moment and a mode volume of the cavity. In this study we have demonstrated controllable emission of Rhodamine 6G organic molecules with relatively low and unoriented dipole moments in a strong coupling regime by placing them into a tunable Fabry-Perot microcavity.
- ПубликацияТолько метаданныеMultilayered Polymer Capsules for Targeted Delivery of Antitumor Compounds(2023) Kalenichenko, D. V.; Nifontova, G. O.; Kriukova, I. S.; Sukhanova, A.; Nabiev, I.; Калениченко, Дарья Владимировна; Крюкова, Ирина Сергеевна; Набиев, Игорь Руфаилович
- ПубликацияТолько метаданныеDetermination of the Single-Exciton Two-Photon Absorption Cross Sections of Semiconductor Nanocrystals through the Measurement of Saturation of Their Two-Photon-Excited Photoluminescence(2020) Karaulov, A.; Krivenkov, V.; Samokhvalov, P.; Dyagileva, D.; Nabiev, I.; Самохвалов, Павел Сергеевич; Набиев, Игорь Руфаилович© 2020 American Chemical Society.Conventional approaches to the determination of the two-photon absorption cross-section (TPACS) of fluorescent semiconductor nanocrystals, including quantum dots (QDs) and nanoplatelets (NPLs), cannot be applied to samples with unknown concentrations and low optical densities and may be inaccurate in the case of multiexciton nanocrystal excitation. Here, we have studied the two-photon-excited photoluminescence saturation in QD and NPL samples and propose a novel technique for determining of their TPACS from the parameters of this process. The technique allows the measurement of the TPACSs of single exciton states in the samples of unknown concentration, as well as in thin films with ultralow optical densities. The calculated values agreed with the results obtained by conventional methods. The new technique paves new ways to studying small amounts of fluorescent nanocrystals of unknown quantity under two-photon excitation.