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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Popov A.K., Myslivets S. A., Shalaev V.M.
Заглавие : Plasmonics: Nonlinear optics, negative phase, and transformable transparency
Коллективы : Plasmonics: Nanoimaging, Nanofabrication, and their Applications V
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering. - 2009. - Vol. 7395. - Ст.73950Z. - ISBN 0277786X (ISSN); 9780819476852 (ISBN), DOI 10.1117/12.824836
Ключевые слова (''Своб.индексиров.''): backward electromagnetic waves--negative-index metamaterials--optical parametric amplification--quantum control--backward electromagnetic waves--control fields--light wave--nanostructured composites--negative group velocity--negative phase--negative-index--negative-index metamaterials--optical energy transfer--optical parametric amplification--optical technique--plasmonic metamaterials--plasmonics--quantum control--cements--electromagnetic wave diffraction--electromagnetic wave scattering--electromagnetic waves--electromagnetism--energy transfer--light--metamaterials--nanophotonics--nonlinear optics--plasmons--transparency--amplification
Аннотация: The feasibilities and specific features of coherent nonlinear-optical energy transfer from control fields to a negativephase signal are studied, and they are found to stem from the backwardness of electromagnetic waves inherent to negative-index metamaterials. Plasmonic metamaterials that possess negative group velocity for light waves promise a revolutionary breakthrough in nanophotonics. However, strong absorption inherent to such metaldielectric nanocomposites imposes severe limitations on the majority of such applications. Herein we show the feasibility and discuss different nonlinear-optical techniques of compensating such losses, producing transparency, amplification and even generation of negative-phase light waves in originally strongly absorbing microscopic samples of plasmonic metal-dielectric nanostructured composites. © 2009 SPIE.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shalaev M.I., Slabko V.V., Myslivets S. A., Popov A.K.
Заглавие : Negative group velocity and three-wave mixing in dielectric crystals
Место публикации : Opt. Lett. - 2011. - Vol. 36, Is. 19. - P.3861-3863. - ISSN 0146-9592, DOI 10.1364/OL.36.003861
Примечания : Cited Reference Count: 15. - Гранты: This work was supported in part by the Russian Federal Program on Science, Education and Innovation under Grant No. 2010-121-102-018, by the Presidium of the Russian Academy of Sciences under Grant No. 27.1, by the Siberian Division of the Russian Academy of Sciences under Integration Project No. 5, and by the U.S. National Science Foundation (NSF) under Grant ECCS-1028353.Финансирующая организация: Russian Federal Program on Science, Education and Innovation [2010-121-102-018]; Presidium of the Russian Academy of Sciences [27.1]; Siberian Division of the Russian Academy of Sciences [5]; U.S. National Science Foundation (NSF) [ECCS-1028353]
Предметные рубрики: INDEX METAMATERIALS
PARAMETRIC AMPLIFICATION
2ND-HARMONIC GENERATION
OSCILLATOR
Ключевые слова (''Своб.индексиров.''): negative group velocity--negative-index--non-linear optical--optical parametric amplification--plasmonic--three wave mixing--electromagnetic waves--electromagnetism--metamaterials--photonic devices--light velocity
Аннотация: We investigate extraordinary features of optical parametric amplification of Stokes electromagnetic waves that originate from the three-wave mixing of a backward phonon wave with negative group velocity and two ordinary electromagnetic waves. Such properties were earlier shown to exist only in plasmonic negative-index metamaterials that are very challenging to fabricate. Nonlinear optical photonic devices with properties similar to those predicted for negative-index metamaterials are proposed. (C) 2011 Optical Society of America
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Optodynamic and photochrome effects in composite media with aggregates of plasmonic nanoparticles in pulsed laser fields
Коллективы : International Conference on Lasers, Applications, and Technologies (LAT 2013) (2013 ; June ; 18-22; Moscow)
Место публикации : ICONO/LAT 2013 : Advance conference program. - 2013. - P.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Optodynamic phenomena in aggregates of polydisperse plasmonic nanoparticles
Коллективы : Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101)]; Ministry of Education and Science of Russian Federation [14.B37.21.0457]
Место публикации : Appl. Phys. B: Springer, 2014. - Vol. 115, Is. 4. - P.547-560. - ISSN 0946-2171, DOI 10.1007/s00340-013-5636-6. - ISSN 1432-0649
Примечания : Cited References: 48. - Authors are thankful to Prof. V. A. Markel (University of Pennsylvania) for supplying program codes for realization of the coupled dipole method for polydisperse metal nanoparticle aggregates. This research was supported by the Russian Academy of Sciences under the Grants 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101); Ministry of Education and Science of Russian Federation under Contract 14.B37.21.0457.
Предметные рубрики: SMALL-PARTICLE COMPOSITES
OPTICAL-PROPERTIES
NOBLE-METALS
SILVER
ELECTRON
LIQUID
GENERATION
DYNAMICS
FORCES
GOLD
Аннотация: We propose an optodynamical model of interaction of pulsed laser radiation with aggregates of spherical metallic nanoparticles embedded into host media. The model takes into account polydispersity of particles, pair interactions between the particles, dissipation of absorbed energy, heating and melting of the metallic core of particles and of their polymer adsorption layers, and heat exchange between electron and ion components of the particle material as well as heat exchange with the interparticle medium. Temperature dependence of the electron relaxation constant of the particle material and the effect of this dependence on interaction of nanoparticles with laser radiation are first taken into consideration. We study in detail light-induced processes in the simplest resonant domains of multiparticle aggregates consisting of two particles of an arbitrary size in aqueous medium. Optical interparticle forces are realized due to the light-induced dipole interaction. The dipole moment of each particle is calculated by the coupled dipole method (with correction for the effect of higher multipoles). We determined the role of various interrelated factors leading to photomodification of resonant domains and found an essential difference in the photomodification mechanisms between polydisperse and monodisperse nanostructures.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Gerasimov V. S., Rasskazov I. L., Karpov S. V.
Заглавие : Variations in extinction spectra of plasmonic nanoparticle aggregates upon deformation during deposition on planar dielectric substrate
Коллективы : "Days on diffraction", International conference, Санкт-Петербургское отделение Института математики им. В. А. Стеклова, Санкт-Петербургский государственный университет, Euler International Mathematical Institute, Российский фонд фундаментальных исследований
Место публикации : Annual Int. Conf. "Days on Diffraction". - 2015. - P.141-142
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Semina P. N.
Заглавие : Effect of local environment in resonant domains of polydisperse plasmonic nanoparticle aggregates on optodynamic processes in pulsed laser fields
Коллективы : Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), 3-9-5]
Место публикации : Chin. Phys. B: IOP Publishing, 2015. - Vol. 24, Is. 4. - Ст.047804. - ISSN 1674, DOI 10.1088/1674-1056/24/4/047804. - ISSN 17414199(eISSN)
Примечания : Cited References:25. - Project supported by the Russian Academy of Sciences (Grant Nos. 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), and 3-9-5).
Предметные рубрики: METAL NANOPARTICLES
GOLD NANOPARTICLES
OPTICAL-PROPERTIES
Ключевые слова (''Своб.индексиров.''): nanoparticle--surface plasmon--colloid aggregate--optodynamics
Аннотация: Interactions of pulsed laser radiation with resonance domains of multiparticle colloidal aggregates having an increasingly complex local environment are studied via an optodynamic model. The model is applied to the simplest configurations, such as single particles, dimers, and trimers consisting of mono- and polydisperse Ag nanoparticles. We analyze how the local environment and the associated local field enhancement by surrounding particles affect the optodynamic processes in domains, including their photomodification and optical properties.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Герасимов, Валерий Сергеевич, Ершов, Александр Андреевич, Гаврилюк, Анатолий Петрович, Рассказов, Илья Леонидович, Полютов, Сергей Петрович, Карпов, Сергей Васильевич
Заглавие : Влияние нагрева наночастиц оптического плазмонного волновода на его трансмиссионные свойства
Коллективы : "Решетневские чтения", международная научно-практическая конференция
Место публикации : Решетневские чтения: матер. XIX Междунар. науч. конф. : в 2 ч. - Красноярск, 2015. - Ч. 1. - С. 506-509
Примечания : Библиогр.: 8 назв.
Аннотация: Рассматривается влияние нагрева частиц оптических плазмонных волноводов как перспективных элементов высокопроизводительных вычислительных комплексов на их функциональные свойства.We study the effect of heating the particles by laser radiation in optical plasmonic nanowaveguides as the promising elements of high-performance computing systems on the functional properties.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Закомирный В. И., Рассказов, Илья Леонидович, Ершов, Александр Евгеньевич, Полютов, Сергей Петрович, Карпов, Сергей Васильевич
Заглавие : Бездиссипативные диэлектрические подложки для оптических плазмонных нановолноводов
Коллективы : "Решетневские чтения", международная научно-практическая конференция
Место публикации : Решетневские чтения: материалы XIX Междунар. науч. конф. : в 2-х ч. - Красноярск: Сибирский государственный аэрокосмический университет им. акад. М. Ф. Решетнева, 2015. - Ч. 1. - С. 520-523. - ISSN 1990-7702
Примечания : Библиогр.: 5
Ключевые слова (''Своб.индексиров.''): поверхностный плазмон-поляритон--плазмонный волновод--диэлектрическая подложка--surface plasmonpolariton--plasmonic nanowaveguides--dielectric substrate
Аннотация: Исследованы оптические свойства линейных цепочек из Ag наносфероидов на кварцевой подложке. Полученные результаты открывают перспективы для использования массивов из наночастиц в качестве элементов оптических интегральных микросхем нового поколения.The paper proposes optical properties of linear chains consisting from silver nanospheroids on quartz substrate. The results obtained provide an opportunity of utilizing such structures in optical integrated circuits of new generation.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Karpov S. V., Polyutov S. P.
Заглавие : Optimizing Au-nanoshells with core of novel plasmonic materials for biomedical applications
Коллективы : International Conference on Laser-Light and Interactions with Particles
Место публикации : The 11th International Conference on Laser-Light and Interactions with Particles: тезисы. - 2016
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Gerasimov R.E., Ershov A. E., Karpov S. V., Polyutov S. P.
Заглавие : Multilayered gold nanoshells with ideal absorption for plasmonic photothermal therapy
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : The International Conference on Coherent and Nonlinear Optics; The Lasers, Applications, and Technologies ICONO/LAT 2016. - 2016. - Ст.IThL8. - P.68-69
Аннотация: In this paper we study multilayered spherical nanoparticles with ideal absorption for biomedical applications. The core of such particles consists of Si, SiO2 or alternative plasmonic materials, such as zinc oxide doped with aluminum, gallium and indium tin oxide whereas the outer shell consists of gold. We develop the algorithm for finding optimal geometry of ideally absorbing Au nanoparticles taking into account the quantum size effect that in multilayered metallic nanoshells plays a significant role.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V .I., Rasskazov I. L., Gerasimov V. S., Ershov A. E., Karpov S. V., Polyutov S. P.
Заглавие : Multilayered gold nanoshells with ideal absorption for plasmonic photothermal therapy
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - Минск, 2016. - Т. 83, Вып. 6-16. - P.177-178. - ISSN 0514-7506
Аннотация: We study multilayered spherical nanoparticles with ideal absorption [1] for biomedical applications. The core of such particles consists of Si, SiO2 or alternative plasmonic materials [2], such as zinc oxide doped with aluminum, gallium and indium tin oxide whereas the outer shell consists of gold. We develop the algorithm for finding optimal geometry of ideally absorbing Au nanoparticles taking into account the quantum size effect that in multilayered metallic nanoshells plays a significant role.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gerasimov V. S., Rasskazov, I. L., Zakomirnyi V. I., Gavrilyuk A. P., Karpov S. V., Polyutov S. P.
Заглавие : Thermal effects in optical plasmonic waveguides
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : Журнал прикладной спектроскопии. - 2016. - Т. 83: Спецвыпуск, Вып. 6-16. - P.96-97. - ISSN 0514-7506
Аннотация: We investigate the influence of the heating of the optical plasmonic waveguide in the form of chains of the plasmonic nanoparticles by laser radiation on its transmission properties.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ershov A. E., Gerasimov R.E., Rasskazov I. L., Zakomirnyi V. I., Gavrilyuk A.P., Karpov S. V., Polyutov S. P.
Заглавие : Thermal effects in optical plasmonic waveguides
Коллективы : International Conference on Coherent and Nonlinear Optics, International Conference on Lasers, Applications, and Technologies
Место публикации : The International Conference on Coherent and Nonlinear Optics; The Lasers, Applications, and Technologies ICONO/LAT 2016. - 2016. - Ст.IThL14. - P.79-80
Аннотация: We investigate the influence of the heating of the optical plasmonic waveguide in the form of chains of the plasmonic nanoparticles by laser radiation on its transmission properties
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rasskazov I. L., Karpov S. V., Panasyuk G. Y., Markel V. A.
Заглавие : Overcoming the adverse effects of substrate on the waveguiding properties of plasmonic nanoparticle chains
Место публикации : J. Appl. Phys.: American Institute of Physics, 2016. - Vol. 119, Is. 4. - Ст.043101. - ISSN 00218979 (ISSN), DOI 10.1063/1.4940415
Примечания : Cited References: 43. - This work has been carried out thanks to the support of the A*MIDEX project (No. ANR-11-IDEX-0001-02) funded by the “Investissements d'Avenir” French Government program, managed by the French National Research Agency (ANR) and was also supported in part by the U.S. National Science Foundation under Grant No. DMS1216970 and by the Ministry of Education and Science of the Russian Federation under Contract No. 1792.
Предметные рубрики: LINEAR-CHAINS
DISPERSION-RELATIONS
ARRAYS
RESONANCES
GUIDES
NANOSPHERES
MODES
FIELD
POLARITONS
PARTICLES
Аннотация: We have studied numerically the propagation of surface plasmon polaritons (SPPs) in linear periodic chains of plasmonic nanoparticles of different shapes. The chains are deposited on top of a thick dielectric substrate. While in many commonly considered cases the substrate tends to suppress the SPP propagation, we have found that this adverse effect is practically absent in the case when the nanoparticles have the shape of oblate spheroids with sufficiently small aspect ratio (e.g., nanodisks) whose axes of symmetry coincide with the axis of the chain. © 2016 AIP Publishing LLC.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Karpov S. V., Polyutov S. P., Semina P. N.
Заглавие : Optimization of photothermal methods for laser hyperthermia of malignant cells using bioconjugates of gold nanoparticles
Место публикации : Colloid J.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 78, Is. 4. - P.435-442. - ISSN 1061933X (ISSN), DOI 10.1134/S1061933X16040050
Примечания : Cited References: 33. - This work was supported by the Ministry of Education and Science of the Russian Federation (contract no. 14.607.21.0104 RFMEFI60714X0104) (Section 3) and the State Assignment of the Ministry of Education and Science of the Russian Federation for Siberian Federal University (contract no. 1792) (Section 2). The numerical calculations were performed using the MVS-1000 M cluster at the Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences.
Предметные рубрики: THERMAL THERAPY
PLASMONIC NANOPARTICLES
OPTICAL-PROPERTIES
TUMOR-CELLS
CARCINOMA
CLUSTERS
CANCER
Аннотация: Selective action of laser radiation on membranes of malignant cells has been studied in different regimes using conjugates of gold nanoparticles with oligonucleotides by the example of DNA aptamers. Under the conditions of a contact between a bioconjugate and a cell surface and the development of substantial and rapidly relaxing temperature gradients near a nanoparticle, the membranes of malignant cells alone are efficiently damaged due to the local hyperthermia of a cellular membrane. It has been shown that employment of pulsed instead of continuous wave laser radiation provides the localization of the damaging action, which does not involve healthy cells. © 2016, Pleiades Publishing, Ltd.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V.
Заглавие : Plasmonic nanoparticle aggregates in high-intensity laser fields: effect of pulse duration
Место публикации : Plasmonics: Springer, 2016. - Vol. 11, No. 2. - P.403-410. - ISSN 1557-1955, DOI 10.1007/s11468-015-0054-8
Примечания : Cited References: 20. - Authors are thankful to Prof. V.A. Markel (University of Pennsylvania) for supplying program codes with realization of coupled dipole method for polydisperse nanoparticle aggregates. This work was performed within the state contract of the RF Ministry of Education and Science for Siberian Federal University for scientific research in 2014 (Reference number 1792)
Предметные рубрики: METAL NANOPARTICLES
Ключевые слова (''Своб.индексиров.''): nanoparticle--surface plasmon--colloidal aggregate--optodynamics
Аннотация: We use an optodynamic model to study the interaction of pulsed laser radiation of different duration with mono- and polydisperse dimers and trimers of plasmonic nanoparticles as resonant domains of colloid Ag multiparticle aggregates. A comparative analysis of the influence of pulse duration on the kinetic characteristics of domains accompanied by the change in their local structure was carried out taking into account the intensity of incident radiation. The obtained results explain the reasons for laser photochromic reactions in materials containing colloidal aggregates of plasmonic nanoparticles.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov A. E., Gavrilyuk A. P., Karpov S. V., Polyutov S. P.
Заглавие : Restructuring of plasmonic nanoparticle aggregates with arbitrary particle size distribution in pulsed laser fields
Место публикации : Chin. Phys. B: IOP, 2016. - Vol. 25, Is. 11. - Ст.117806. - ISSN 16741056 (ISSN), DOI 10.1088/1674-1056/25/11/117806
Примечания : Cited References: 47. - This work was performed within the state contract of the RF Ministry of Education and Science for Siberian Federal University for scientific research in 2016 (Reference number 1792) and SB RAS Program No II.2P (0358-2015-0010). Numerical computations were performed on the cluster MVS-1000 M of the Institute of computational modeling SB RAS.
Ключевые слова (''Своб.индексиров.''): optodynamics--nanoparticle--surface plasmon--laser radiation
Аннотация: We have studied processes of interaction of pulsed laser radiation with resonant groups of plasmonic nanoparticles (resonant domains) in large colloidal nanoparticle aggregates having different interparticle gaps and particle size distributions. These processes are responsible for the origin of nonlinear optical effects and photochromic reactions in multiparticle aggregates. To describe photo-induced transformations in resonant domains and alterations in their absorption spectra remaining after the pulse action, we introduce the factor of spectral photomodification. Based on calculation of changes in thermodynamic, mechanical, and optical characteristics of the domains, the histograms of the spectrum photomodification factor have been obtained for various interparticle gaps, an average particle size, and the degree of polydispersity. Variations in spectra have been analyzed depending on the intensity of laser radiation and various combinations of size characteristics of domains. The obtained results can be used to predict manifestation of photochromic effects in composite materials containing different plasmonic nanoparticle aggregates in pulsed laser fields. © 2016 Chinese Physical Society and IOP Publishing Ltd.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimov V. S., Ershov A. E., Gavrilyuk A. P., Karpov S. V., Agren H., Polyutov S. P.
Заглавие : Suppression of surface plasmon resonance in Au nanoparticles upon transition to the liquid state
Место публикации : Opt. Express: Optical Society of America, 2016. - Vol. 24, Is. 23. - P.26851-26856. - ISSN 10944087 (ISSN), DOI 10.1364/OE.24.026851
Примечания : Cited References: 24. - This work was performed within the State contract of the RF Ministry of Education and Science for Siberian Federal University for scientific research in 2014–2016 (Reference number 1792) and SB RAS Program No II.2P (0358-2015-0010). The numerical calculations were performed using the MVS-1000 M cluster at the Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences.
Ключевые слова (''Своб.индексиров.''): electron scattering--gold--lattice constants--liquids--melting--metal nanoparticles--nanoparticles--surface plasmon resonance--electron phonon couplings--experimental spectra--experimental values--gold nanoparticles--nonlinear optical response--plasmonic nanoparticle--relaxation constants--surface plasmon frequency--plasmons
Аннотация: Significant suppression of resonant properties of single gold nanoparticles at the surface plasmon frequency during heating and subsequent transition to the liquid state has been demonstrated experimentally and explained for the first time. The results for plasmonic absorption of the nanoparticles have been analyzed by means of Mie theory using experimental values of the optical constants for the liquid and solid metal. The good qualitative agreement between calculated and experimental spectra support the idea that the process of melting is accompanied by an abrupt increase of the relaxation constants, which depends, beside electronphonon coupling, on electron scattering at a rising number of lattice defects in a particle upon growth of its temperature, and subsequent melting as a major cause for the observed plasmonic suppression. It is emphasized that observed effect is fully reversible and may underlie nonlinear optical responses of nanocolloids and composite materials containing plasmonic nanoparticles and their aggregates in conditions of local heating and in general, manifest itself in a wide range of plasmonics phenomena associated with strong heating of nanoparticles. © 2016 Optical Society of America.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovskaya O. S., Zamay T. N., Belyanina I. V., Karlova E. A., Garanzha I. V., Aleksandrovsky A. S., Kirichenko A. K., Dubinina A. V., Sokolov A. Е., Zamay G. S., Glazyrin Y. E., Zamay S. S., Ivanchenko T. I., Chanchikova N. G., Tokarev N. A., Shepelevich N. V., Ozerskaya A.V., Bardin E., Belugin K., Belkin S. A., Zabluda V. N., Gargaun A., Berezovski M. V., Kichkailo A.S.
Заглавие : Aptamer-targeted plasmonic photothermal therapy of cancer
Место публикации : Mol. Ther. Nucl. Acids. - 2017. - Vol. 9. - P.12-21. - ISSN 2162-2131 Electronic, DOI 10.1016/j.omtn.2017.08.007
Примечания : Cited References: 8. - We thank Mr. Yousef Risha for improving the use of English in the manuscript and Mr. George Y. Vorogeikin, Mr. Yuri I. Vorogeikin, and “OKB ART” for the infrared imaging. This research is supported by Ministry of Education and Science Federal Target Program #14.607.21.0104 (RFMEFI60714X0104).
Аннотация: Novel nanoscale bioconjugates combining unique plasmonic photothermal properties of gold nanoparticles (AuNPs) with targeted delivery using cell-specific DNA aptamers have a tremendous potential for medical diagnostics and therapy of many cell-based diseases. In this study, we demonstrate the high anti-cancer activity of aptamer-conjugated, 37-nm spherical gold nanoparticles toward Ehrlich carcinoma in tumor-bearing mice after photothermal treatment. The synthetic anti-tumor aptamers bring the nanoparticles precisely to the desired cells and selectively eliminate cancer cells after the subsequent laser treatment. To prove tumor eradication, we used positron emission tomography (PET) utilizing radioactive glucose and computer tomography, followed by histological analysis of cancer tissue. Three injections of aptamer-conjugated AuNPs and 5 min of laser irradiations are enough to make the tumor undetectable by PET. Histological analysis proves PET results and shows lower damage of healthy tissue in addition to a higher treatment efficiency and selectivity of the gold nanoparticles functionalized with aptamers in comparison to control experiments using free unconjugated nanoparticles.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zakomirnyi V. I., Rasskazov I. L., Karpov S. V., Polyutov S. P.
Заглавие : New ideally absorbing Au plasmonic nanostructures for biomedical applications
Место публикации : J. Quant. Spectrosc. Radiat. Transf.: Elsevier, 2017. - Vol. 187. - P.54-61. - ISSN 0022-4073, DOI 10.1016/j.jqsrt.2016.08.015
Примечания : Cited References: 67. - The authors would like to thank the anonymous reviewers for their helpful and constructive comments that greatly contributed to improving the final version of the paper.This work was performed within the State contract of the RF Ministry of Education and Science for Siberian Federal University for scientific research in 2014-2016 (Reference number 1792) and SB RAS Program No II.2P (0358-2015-0010).
Ключевые слова (''Своб.индексиров.''): ideal absorption--nanomatryoshka--nanoshell--plasmonic photothermal therapy
Аннотация: In this paper a new set of plasmonic nanostructures operating at the conditions of an ideal absorption (Grigoriev et al., 2015 [1]) was proposed for novel biomedical applications. We consider spherical x/Au nanoshells and Au/x/Au nanomatryoshkas, where ‘x’ changes from conventional Si and SiO2 to alternative plasmonic materials (Naik and Shalaev, 2013 [2]), such as zinc oxide doped with aluminum, gallium and indium tin oxide. The absorption peak of proposed nanostructures lies within 700–1100 nm wavelength region and corresponds to the maximal optical transparency of hemoglobin and melanin as well as to the radiation frequency of available pulsed medical lasers. It was shown that the ideal absorption takes place in a given wavelength region for Au coatings with thickness less than 12 nm. In this case finite quantum size effects for metallic nanoshells play a significant role. The mathematical model for the search of the ideal absorption conditions was modified by taking into account the finite quantum size effects. © 2016
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