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    Magnetic, structural, and electronic properties of iron sulfide Fe3S4 nanoparticles synthesized by the polyol mediated process / I. S. Lyubutin [et al.] // J. Nanopart. Res. - 2013. - Vol. 15. - P. 1397DOI 10.1007/s11051-012-1397-0
   Перевод заглавия: Магнитные, структурные и электронные свойства наночастиц сульфида железа Fe3S4, полученных полиол-синтезом
Аннотация: Iron sulfide nanoparticles Fe3S4 with the spinel-type crystal structure were synthesized by the polyol mediated process. The particle size depends on preparation conditions and varies from 9 to 20 nm. Mössbauer data have revealed that the dominating fraction of iron ions in the 9-nm sample is in the high-spin ferric state. This implies an occurrence of the cation vacancies in nonstoichiometric greigite. The stoichiometric phase of greigite Fe3S4 dominates in the 18-nm-size nanoparticles. Magnetic measurements have shown a ferrimagnetic behavior of all samples at temperatures between 78 and 300 K. The estimated value of magnetic moment of the stoichiometric greigite nanoparticles is about 3.5 μB per Fe3S4 unit. The Mössbauer spectra indicate a superparamagnetic behavior of small particles, and some fraction of superparamagnetic phase is observed in all samples synthesized which may be caused by the particle size distribution. The blocking temperatures of T B ≈ 230 and 250 K are estimated for the 9 and 14 nm particles, respectively. The Mössbauer parameters indicate a great degree of covalency in the Fe–S bonds and support the fast electron Fe3+ ⇆ Fe2+ exchange in the B-sites of greigite. An absence of the Verwey transition at temperatures between 90 and 295 K is established supporting a semimetal type of conductivity. The temperature and magnetic field dependences of the magnetic circular dichroism (MCD) of optical spectra were measured in Fe3S4 for the first time. The spectra differ substantially from that of the isostructural oxide Fe3O4. It is supposed that the MCD spectra of greigite nanoparticles result from the collective electron excitations in a wide band with superimposed peaks of the d–d transitions in Fe ions.

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Держатели документа:
Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
Southern Taiwan Univ Sci & Technol, Dept Mech Engn, Inst Nanotechnol, Tainan 710, Taiwan
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Lyubutin, I. S.; Starchikov, S. S.; Lin, Chun-Rong; Lu, Shin-Zong; Shaikh, M. O.; Funtov, K. O.; Dmitrieva, T. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Edelman, I. S.; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич
}
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Processing of detonation diamonds with metal-containing high-frequency arc plasma and their properties / G. N. Churilov [et al.] // Fuller. Nanotub. Carbon Nanostruct. - 2012. - Vol. 20, Is. 4/7 SI. - P. 611-615, DOI 10.1080/1536383X.2012.657014. - Cited References: 5. - The work was partially supported by RFBR foundation (project 09-03-00383). . - ISSN 1536-383X

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Atomic, Molecular & Chemical

Кл.слова (ненормированные):
Nanodiamond -- nanoparticle -- metal-containing plasma
Аннотация: This paper describes coating of diamond powder with metal by plasma. Arc plasma was generated in double jet high-frequency argon-operated plasmatron with atomized metal inserts. The diamond powder was added to the plasma in a flow of helium. Copper and nickel coated particles of detonation and industrial diamonds were studied by XRD, XPS, SEM methods and electron magnetic resonance. Results of these studies are presented.

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Держатели документа:
[Churilov, G. N.
Osipova, I. V.
Vnukova, N. G.
Glushenko, G. A.
Petrakovskaya, E. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Kolonenko, A. L.
Chiganov, A. S.] Krasnoyarsk State Pedag Univ, Krasnoyarsk, Russia
[Tomashevich, Ye. V.
Zhizhaev, A. M.] Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Churilov, G. N.; Чурилов, Григорий Николаевич; Osipova, I. V.; Осипова, Ирина Владимировна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Glushchenko, G. A.; Глущенко, Гарий Анатольевич; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Kolonenko, A. L.; Колоненко, Андрей Леонидович; Chiganov, A. S.; Tomashevich, Y. V.; Томашевич, Евгений Владимирович; Zhyzhaev, A. M.; Жижаев, Анатолий Михайлович
}
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Nanoparticle-containing glasses co-doped with transition and rare earth elements: comparative studies of transparent magnets / I. S. Edelman [et al.] // Phys. Chem. Glasses - Eur. J. Glass Sci. Technol. Part B. - 2012. - Vol. 53, Is. 2. - P. 37-44. - Cited References: 22 . - ISSN 1753-3562

РУБ Chemistry, Physical + Materials Science, Ceramics
Рубрики:
ANISOTROPY
RESONANCE
FERRITE
Аннотация: A comparative multitechnique study (including transmission electron microscopy, synchrotron radiation, static magnetisation, magnetic circular dichroism and electron magnetic resonance) has been carried out of nanoparticle-containing borate glasses of two different types: (i) with iron and manganese oxide additives and (ii) with iron and rare earth oxide additives. Due to the presence of magnetic nanoparticles, these glasses have a nonlinear magnetic field dependence of magnetization with hysteresis and saturation while remaining transparent in the visible and near-infrared spectral ranges. The nature of the nanoparticles has been identified as manganese ferrite for type (i) glasses and maghemite for type (ii) glasses. The synchrotron radiation studies as well as the computer-assisted electron magnetic resonance provide an insight into the morphological characteristics of the magnetic nanoparticles in the glass.

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Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Ivanova, O.; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Zabluda, V. N.; Заблуда, Владимир Николаевич; Hennet, L.; Thiaudiere, D.; Saboungi, M. L.; Zubavichus, Y.; Stepanov, S.; Zaikovskii, V. I.; Artemenko, A.; Kliava, J.; International Conference on the Chemistry of Glasses and Glass-Forming Melts (2011 ; Sept. ; Oxford, England)
}
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Effects of size polydispersity on the extinction spectra of colloidal nanoparticle aggregates / A. E. Ershov [et al.] // Phys. Rev. B. - 2012. - Vol. 85, Is. 4. - Ст. 045421. - P. , DOI 10.1103/PhysRevB.85.045421. - Cited References: 41. - This work was supported by grants from the following foundations of the Russian Federation: Presidium of RAS, OFN RAS, and SB RAS. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
METAL FRACTAL CLUSTERS
   OPTICAL-PROPERTIES
   ABSORPTION
   NONLINEARITIES
   COMPOSITES
   SCATTERING
   PARTICLES
   SPHERES
   GRAINS
Аннотация: We investigate the effect of particle polydispersity on the optical extinction spectra of colloidal aggregates of spherical metallic (silver) nanoparticles, taking into account the realistic interparticle gaps caused by layers of stabilizing polymer adsorbed on the metal surface (adlayers). The spectra of computer-generated aggregates are computed using two different methods. The coupled-multipole method is used in the quasistatic approximation and the coupled-dipole method beyond the quasistatics. The latter approach is applicable if the interparticle gaps are sufficiently wide relative to the particle radii. Simulations are performed for two different particle size distribution functions (bimodal and Gaussian), varying the number of particles per aggregate, and different distribution functions of the interparticle gap width. The strong influence of the latter factor on the spectra is demonstrated and investigated in detail.

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Держатели документа:
[Ershov, Alexander E.
Isaev, Ivan L.
Semina, Polina N.
Karpov, Sergei V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ershov, Alexander E.
Karpov, Sergei V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Markel, Vadim A.] Univ Penn, Dept Bioengn, Dept Radiol, Philadelphia, PA 19104 USA
[Markel, Vadim A.] Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Isaev, I. L.; Исаев, Иван Леонидович; Semina, P. N.; Семина, Полина Николаевна; Markel, V. A.; Karpov, S. V.; Карпов, Сергей Васильевич
}
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    Structure and magnetic properties of biogenic ferrihydrite nanoparticles doped with gadolinium / S. V. Stolyar [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2013. - Vol. 6, Is. 3. - P. 358-365 ; Журн. СФУ. Сер. "Математика и физика" . - ISSN 1997-1397
   Перевод заглавия: Структура и магнитные свойства биогенных наночастиц ферригидрита, легированных гадолинием
Кл.слова (ненормированные):
ferrihydrite nanoparticle -- bacterial culture Klebsiela oxytoca -- Mössbauer spectroscopy -- gadolinium doping
Аннотация: Bacterial culture Klebsiella oxytoca was grown in a Lovley medium at various concentrations of gadolinium salt. Biogenic magnetic nanoparticles of ferrihydrite were investigated by Mossbauer spectroscopy and magnetization curves were obtained. The results of structural studies showed that iron Fe(5) takes new position when cultivating is carried out in medium with high concentrations of gadolinium. It was found that gadolinium is fit into the crystal structure of ferrihydrite. These results are consistent with the analysis of the magnetization curves.

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Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Bayukov, O. A.; Баюков, Олег Артемьевич; Ladygina, V. P.; Ischenko, L. A.; Iskhakov, R. S.; Исхаков, Рауф Садыкович

}
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Mankov, Yu. I.
Effect of the shape of an antiferromagnetic nanoparticle on its magnetization / Yu. I. Mankov, R. G. Khlebopros // Tech. Phys. - 2012. - Vol. 57, Is. 5. - P. 733-734, DOI 10.1134/S1063784212050209. - Cited References: 21 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
DES GRAINS FINS
Аннотация: The dependence of the magnetization of an antiferromagnetic nanoparticle on its shape is studied in terms of a core-shell model. The magnetizations of a nanodisk, nanowire, and spherical particle are shown to differ several fold.

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Публикация на русском языке Маньков, Юрий Иннокентьевич. Влияние формы антиферромагнитной наночастицы на ее намагниченность [Текст] / Ю. И. Маньков, Р. Г. Хлебопрос // Журн. техн. физ. - 2012. - Т. 82 Вып. 5. - С. 157-158

Держатели документа:
[Mankov, Yu. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Khlebopros, R. G.] Russian Acad Sci, Int Sci Ctr Extreme States Organisms, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia
[Khlebopros, R. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Khlebopros, R. G.; Хлебопрос, Рэм Григорьевич; Маньков, Юрий Иннокентьевич
}
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Actual composition and structure of manganese ferrite nanoparticles dispersed in the borate glass matrix / I. G. Vasilyeva [et al.] // Doklady Chemistry. - 2005. - Vol. 401, Is. 1-3. - P. 47-50, DOI 10.1007/s10631-005-0029-y . - ISSN 0012-5008
Кл.слова (ненормированные):
boric acid -- ferrite -- glass -- manganese derivative -- analytic method -- article -- chemical composition -- chemical structure -- nanoparticle -- stoichiometry -- structure analysis -- transmission electron microscopy -- X ray analysis

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Публикация на русском языке Реальный состав и структура наночастиц феррита марганца, диспергированных в матрице боратных стекол [Текст] / И. Г. Васильева [и др.] // Доклады Академии наук. - 2005. - Т. 401 № 3. - С. 349-352

Держатели документа:
Nikolaev Inst. of Inorg. Chemistry, Siberian Division, Russian Academy of Sciences, pr. akademika Lavrent'eva 3, Novosibirsk, 630090, Russian Federation
Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. akademika Lavrent'eva 5, Novosibirsk, 630090, Russian Federation
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
All-Russia Research Center, Vavilov State Optical Institute, ul. Babushkina 36/1, St. Petersburg, 192371, Russian Federation

Доп.точки доступа:
Vasilyeva, I. G.; Dovlitova, L. S.; Zaikovskii, V. I.; Malakhov, V. V.; Edel'man, I. S.; Эдельман, Ирина Самсоновна; Stepanov, A. S.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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Effect of local environment in resonant domains of polydisperse plasmonic nanoparticle aggregates on optodynamic processes in pulsed laser fields / A. E. Ershov [et al.] // Chin. Phys. B. - 2015. - Vol. 24, Is. 4. - Ст. 047804, DOI 10.1088/1674-1056/24/4/047804. - 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). . - ISSN 1674. - ISSN 1741-4199. -

РУБ Physics, Multidisciplinary
Рубрики:
METAL NANOPARTICLES
GOLD NANOPARTICLES
OPTICAL-PROPERTIES
Кл.слова (ненормированные):
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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Держатели документа:
Russian Acad Sci, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Semina, P. N.; Семина, Полина Николаевна; Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101), 3-9-5]
}
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Gerasimov, V. S.
Variations in extinction spectra of plasmonic nanoparticle aggregates upon deformation during deposition on planar dielectric substrate / V. S. Gerasimov, I. L. Rasskazov, S. V. Karpov // Annual Int. Conf. "Days on Diffraction". - 2015. - P. 141-142

Материалы конференции

Доп.точки доступа:
Rasskazov, I. L.; Рассказов, Илья Леонидович; Karpov, S. V.; Карпов, Сергей Васильевич; Герасимов, Валерий Сергеевич; "Days on diffraction", International conference(2015 ; may ; 25-29 ; St. Petersburg); Санкт-Петербургское отделение Института математики им. В. А. Стеклова; Санкт-Петербургский государственный университет; Euler International Mathematical Institute; Российский фонд фундаментальных исследований
}
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10.

Ershov, A. E.
Plasmonic nanoparticle aggregates in high-intensity laser fields: effect of pulse duration / A. E. Ershov, A. P. Gavrilyuk, S. V. Karpov // Plasmonics. - 2016. - Vol. 11, No. 2. - P. 403-410, DOI 10.1007/s11468-015-0054-8. - 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) . - ISSN 1557-1955

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
METAL NANOPARTICLES
Кл.слова (ненормированные):
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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Доп.точки доступа:
Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Ершов, Александр Андреевич
}
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11.

Overcoming the adverse effects of substrate on the waveguiding properties of plasmonic nanoparticle chains / I. L. Rasskazov [et al.] // J. Appl. Phys. - 2016. - Vol. 119, Is. 4. - Ст. 043101, DOI 10.1063/1.4940415. - 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. . - ISSN 0021-8979

РУБ Physics, Applied
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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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
L. V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Aerospace Systems Dirct., Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, United States
Aix-Marseille Universite, CNRS, Centrale Marseille, Institut Fresnel UMR 7249, Marseille, France
Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States

Доп.точки доступа:
Rasskazov, I. L.; Рассказов, Илья Леонидович; Karpov, S. V.; Карпов, Сергей Васильевич; Panasyuk, G. Y.; Markel, V. A.
}
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12.

Unusual magnetic transitions and nature of magnetic resonance spectra in oxide glasses containing gadolinium / J. . Kliava [et al.] // Phys. Rev. B. - 2005. - Vol. 71, Is. 10. - Ст. 104406, DOI 10.1103/PhysRevB.71.104406. - Cited References: 40 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRON-PARAMAGNETIC-RESONANCE
   BORATE GLASSES
   IONS
   BEHAVIOR
   GD3+
   SPECTROSCOPY
   SYSTEMS
   GD-3+
   FIELD
   SHAPE
Кл.слова (ненормированные):
gadolinium -- glass -- lanthanide -- oxide -- anisotropy -- article -- chemical structure -- concentration response -- electron spin resonance -- energy -- magnetism -- molecular physics -- nanoparticle -- phase transition -- refraction index -- temperature sensitivity
Аннотация: Magnetic susceptibility, electron paramagnetic resonance (EPR), and optical properties have been studied in a glass system {20La(2)O(3)-22Al(2)O(3)-23B(2)O(3)-35(SiO2+GeO2)} with a part of La2O3 substituted by Gd2O3 in different concentrations. Positive Weiss constants have been found in the more heavily doped glasses and ascribed to clustering of Gd3+ ions. Two magnetic phase transitions at 55 and 12 K were detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters containing Gd ions. The overall shape of the EPR spectra shows the presence of clustering at the higher Gd contents. At low temperatures the cluster-related resonance signal is altered in shape, indicating an onset of magnetic anisotropy field. This signal is convincingly fitted to superparamagnetic resonance arising from ferromagnetic nanoparticles. The clustering, depending on the Gd concentration, correlates with a significant shift to lower energies of the strong optical absorption band edge, ascribed to a charge transfer transition between Gd ions. A nonmonotonous change of refractive index with the increase of the Gd content indicates changes in the glass matrix and in Gd cluster structure.

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Держатели документа:
Univ Bordeaux 1, CNRS, UMR 5798, CPMOH, F-33405 Talence, France
Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel
RAS, SB, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
SI Vavilov State Opt Inst, St Petersburg 199034, Russia
Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel
ИФ СО РАН
CPMOH, UMR 5798, CNRS-Universite Bordeaux-I, 33405 Talence Cedex, France
Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
L. V. Kirensky Institute of Physics SB RAS, Krasnoyarsk 660036, Russian Federation
S. V. Vavilov State Optical Institute, St. Petersburg 199034, Russian Federation
Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel

Доп.точки доступа:
Kliava, J.; Malakhovskii, A. V.; Малаховский, Александр Валентинович; Edelman, I. S.; Эдельман, Ирина Самсоновна; Potseluyko, A. M.; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Melnikova, S.V.; Мельникова, Светлана Владимировна; Zarubina, T. V.; Petrovskii, G.; Bruckental, Y.; Yeshurun, Y.
}
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13.

Electromagnetic density of states and absorption of radiation by aggregates of nanospheres with multipole interactions / V. A. Markel [et al.] // Phys. Rev. B. - 2004. - Vol. 70, Is. 5. - Ст. 54202, DOI 10.1103/PhysRevB.70.054202. - Cited References: 81 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
DISCRETE-DIPOLE APPROXIMATION
   ENHANCED RAMAN-SCATTERING
   METAL FRACTAL CLUSTERS
   OPTICAL-PROPERTIES
   SELECTIVE PHOTOMODIFICATION
   DISORDERED CLUSTERS
   NUMERICAL-SIMULATION
   SPECTRAL DEPENDENCE
   PARTICULATE MATTER
   LIGHT-SCATTERING
Кл.слова (ненормированные):
carbon -- iron -- palladium -- silver -- article -- dipole -- electromagnetic field -- geometry -- mathematical analysis -- molecular interaction -- nanoparticle -- radiation absorption
Аннотация: We calculate the quasistatic electromagnetic density of states for aggregates of touching spheres, in particular, linear chains and computer-generated random fractal aggregates. Multipole moments with orders of up to L=64 are taken into account for random aggregates with the number of particles of up to N=100 and up to L=8000 for linear chains. Extensive comparisons with the dipole approximation and geometrical cluster renormalization method are performed. Extinction spectra are calculated for several metals and black carbon. Long wavelength electromagnetic properties of fractal aggregates are considered in details.

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Держатели документа:
Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA
Jackson State Univ, Dept Phys, Jackson, MS 39217 USA
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia
Krasnoyarsk State Tech Univ, Dept Phys & Engn, Krasnoyarsk 660028, Russia
Natl Acad Sci Ukraine, Inst Surface Chem, UA-03164 Kiev, Ukraine
ИФ СО РАН
Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, United States
Department of Physics, Jackson State University, Jackson, MS 39217, United States
L. V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Moscow Inst. of Phys. and Technology, Dolgoprudny, Moscow Region 141700, Russian Federation
Dept. of Physics, and Engineering, Krasnoyarsk State Tech. University, Krasnoyarsk 660028, Russian Federation
Institute of Surface Chemistry, Natl. Academy of Sciences of Ukraine, 17 General Naumov St., 03164 Kiev, Ukraine

Доп.точки доступа:
Markel, V. A.; Pustovit, V. N.; Karpov, S. V.; Карпов, Сергей Васильевич; Obuschenko, A. V.; Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Isaev, I. L.; Исаев, Иван Леонидович
}
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14.

Surface bonding states of nano-crystalline diamond balls / J. L. Peng [et al.] // Int. J. Mod. Phys. B. - 2001. - Vol. 15, Is. 31. - P. 4071-4085, DOI 10.1142/S0217979201007865. - Cited References: 20 . - ISSN 0217-9792

РУБ Physics, Applied + Physics, Condensed Matter + Physics, Mathematical
Рубрики:
PLASMON RESPONSE
   POWDER
   SPECTROSCOPY
   MICROSCOPY
   SILICON
   SI(111)
Кл.слова (ненормированные):
diamond -- article -- crystal structure -- electron -- energy transfer -- nanoparticle -- particulate matter -- structure analysis -- surface property -- transmission electron microscopy
Аннотация: The rough surface of nano-crystalline diamond spheres induces surface electronic states which appear as a broadened pre-peak over approx. 15 eV at the C K-edge energy threshold for carbon in the parallel electron energy loss spectrum (PEELS). This appears to be at least partially due to 1s-pi* transitions, although typically the latter occupy a range of only 4 eV for the sp(2) edge of highly-oriented pyrollytic graphite (HOPG). No pi* electrons appear in the conduction band inside the diamond particles, where all electrons are sp(3) hybridized. PEELS data were also obtained from a chemical vapour deposited diamond film (CVDF) and gem-quality diamond for comparison with the spectra of nano-diamonds. The density of sp(2) and sp(3) states on the surface of diamond nano-crystals is calculated for simple structural models of the diamond balls, including some conjecture about surface structures. The results are used to interpret the sp(2)/sp(3) ratios measured from the PEELS spectra recorded as scans across the particles. Surface roughness at the atomic scale was also examined using high-resolution transmission electron microscopy (HRTEM) and electron nano-diffraction patterns were used to confirm the crystal structures.

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Держатели документа:
RMIT Univ, Dept Appl Phys, Melbourne, Vic 3051, Australia
Univ Sydney, Electron Microscope Unit, Sydney, NSW 2006, Australia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Mol Architecture Grp, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
Univ Melbourne, Sch Phys, Parkville, Vic 3052, Australia
ИФ СО РАН
ИБФ СО РАН
Department of Applied Physics, RMIT University, Swanston Street, Melbourne, Vic. 3051, Australia
Electron Microscope Unit, University of Sydney, NSW 2006, Australia
Molecular Architecture Group, Kirensky Institute of Physics, Institute of Biophysics, 660036 Krasnoyarsk, Russian Federation
School of Physics, University of Melbourne, Parkville, Vic. 3010, Australia

Доп.точки доступа:
Peng, J. L.; Bulcock, S.; Belobrov, P. I.; Белобров, Петр Иванович; Bursill, L. A.
}
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15.

    Belyaev, B. A.
    Resonances of electromagnetic oscillations in a spherical metal nanoparticle / B. A. Belyaev, V. V. Tyurnev // Microw. Opt. Technol. Lett. - 2016. - Vol. 58, Is. 8. - P. 1883-1886, DOI 10.1002/mop.29930. - Cited References:18 . - ISSN 0895-2477. - ISSN 1098-2760
   Перевод заглавия: Резонансы электромагнитных колебаний в сферической металлической наночастице

РУБ Engineering, Electrical & Electronic + Optics
Рубрики:
OPTICAL-PROPERTIES
LIGHT
Кл.слова (ненормированные):
plasmonics -- scattering -- particles -- resonators -- resonant modes
Аннотация: Electrodynamic analysis of plasma oscillations in a spherical metal nanoparticle is performed. It is shown that typical reduction in the frequency and quality factor of the resonances with increasing nanoparticle radius fades if the mode number grows. Depending on the particle radius, the resonant enhancement of the electric field might considerably either increase or decrease with increasing mode number. (C) 2016 Wiley Periodicals, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич
}
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16.

    Effect of visible and UV irradiation on the aggregation stability of CdTe quantum dots / A. S. Tsipotan [et al.] // J. Nanopart. Res. - 2016. - Vol. 18, Is. 11. - P. 324-8, DOI 10.1007/s11051-016-3638-0. - Cited References: 23 . - ISSN 1388-0764
   Перевод заглавия: Влияние видимого и ультрафиолетового излучения на процесс агрегации квантовых точек CdTe
Кл.слова (ненормированные):
Nanotechnology -- Quantum dots -- Photostimulated aggregation -- Photostability -- Colloids -- Laser-induced self-assembly
Аннотация: The possibility of controlling the aggregation stability of CdTe quantum dots (QDs) stabilized by thioglycolic acid (TGA) is important for implementation of quasi-resonant laser-induced self-assembly. This study examines the influence of irradiation by the UV as well as by the visible light on the photostimulated aggregation of QDs. Different photochemical mechanisms are identified, depending on whether light wavelength falls into an interband transition or the first exciton transition. Irradiation by visible light does not lead to changes in the absorption spectra but decreases luminescence intensity through the detachment of TGA and the formation of dangling bonds, leading to the creation of radiativeless relaxation centers. UV irradiation (in the 300–370 nm range), at an intensity of 0.4 W/cm2, initially (during the first 75 min) leads to the degradation of the stabilizer and QDs’ surface. After 75 min of combined UV and visible light irradiation, a gradual increase in spontaneous aggregation takes place, testifying excessive decrease in stabilizing potential barrier height. Hence, the laser-induced self-assembly of CdTe QDs is recommended to be performed over a time period of between 80 and 100 min after the beginning of low-intensity UV irradiation under conditions equivalent to those applied in this study. © 2016, Springer Science+Business Media Dordrecht.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Russian Academy of Sciences, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tsipotan, A. S.; Gerasimova, M. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Slabko, V. V.
}
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17.

Suppression of surface plasmon resonance in Au nanoparticles upon transition to the liquid state / V. S. Gerasimov [et al.] // Opt. Express. - 2016. - Vol. 24, Is. 23. - P. 26851-26856, DOI 10.1364/OE.24.026851. - 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. . - ISSN 1094-4087
Кл.слова (ненормированные):
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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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarskz, Russian Federation
Division of Theoretical Chemistry and Biology, Royal Institute of Technology, Stockholm, Sweden

Доп.точки доступа:
Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Ershov, A. E.; Ершов, Александр Евгеньевич; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Agren, H.; Polyutov, S. P.
}
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18.

Restructuring of plasmonic nanoparticle aggregates with arbitrary particle size distribution in pulsed laser fields / A. E. Ershov [et al.] // Chin. Phys. B. - 2016. - Vol. 25, Is. 11. - Ст. 117806, DOI 10.1088/1674-1056/25/11/117806. - 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. . - ISSN 1674-1056
Кл.слова (ненормированные):
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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Держатели документа:
Institute of Computational Modeling, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
L. V. Kirensky Institute of Physics of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Ershov, A. E.; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Polyutov, S. P.
}
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19.

Thermal effects in systems of colloidal plasmonic nanoparticles in high-intensity pulsed laser fields [Invited] / V. S. Gerasimov [et al.] // Opt. Mater. Express. - 2017. - Vol. 7, Is. 2. - P. 555-568, DOI 10.1364/OME.7.000555. - Cited References: 68. - This work was performed within the State contract of the RF Ministry of Education and Science for Siberian Federal University for scientific research in 2017-2019 and SB RAS Program No II.2P (0358-2015-0010). The calculations were performed using the MVS-1000 M cluster at the Institute of Computational Modeling, Federal Research Center KSC SB RAS. . - ISSN 2159-3930
Кл.слова (ненормированные):
Aggregates -- Gold -- Nanoparticles -- Plasmons -- Silver -- Ag nanoparticle -- High intensity -- Light-induced process -- Nanoparticle aggregate -- Physical model -- Plasmonic nanoparticle -- Pulsed-laser field -- Thermal interaction -- Pulsed lasers
Аннотация: We have studied light induced processes in nanocolloids and composite materials containing ordered and disordered aggregates of plasmonic nanoparticles accompanied by their strong heating. A universal comprehensive physical model that combines mechanical, electrodynamical, and thermal interactions at nanoscale has been developed as a tool for investigations. This model was used to gain deep insight on phenomena that take place in nanoparticle aggregates under high-intensity pulsed laser radiation resulting in the suppression of nanoparticle resonant properties. Verification of the model was carried out with single colloidal Au and Ag nanoparticles and their aggregates. © 2017 Optical Society of America.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Royal Institute of Technology, Stockholm, Sweden
The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, United States

Доп.точки доступа:
Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Ershov, A. E.; Karpov, S. V.; Карпов, Сергей Васильевич; Gavrilyuk, A. P.; Zakomirnyi, V. I.; Rasskazov, I. L.; Agren, H.; Polyutov, S. P.
}
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20.

Thermal effects in systems of colloidal plasmonic nanoparticles in high-intensity pulsed laser fields [Invited]: Publisher's note / V. S. Gerasimov [et al.] // Opt. Mater. Express. - 2017. - Vol. 7, Is. 3. - P. 799-799, DOI 10.1364/OME.7.000799. - Cited References: 1 . - ISSN 2159-3930
Кл.слова (ненормированные):
Optical materials -- High intensity -- Plasmonic nanoparticle -- Pulsed-laser field -- Materials science
Аннотация: This publisher's note amends the author list of [Opt. Mater. Express 7, 5555 (2017)].

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Royal Institute of Technology, Stockholm, Sweden
The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana- Champaign, Urbana, IL, United States

Доп.точки доступа:
Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Ershov, A. E.; Karpov, S. V.; Карпов, Сергей Васильевич; Gavrilyuk, A. P.; Zakomirnyi, V. I.; Rasskazov, I. L.; Agren, H.; Polyutov, S. P.
}
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