?
Применение оптических микрорезонаторов с модами типа “шепчущей галереи” для обнаружения наночастиц серебра в водной среде
Оптика и спектроскопия. 2017. Т. 122. № 6. С. 1037-1039.
Самойленко А. А., Левин Г. Г., Lyaskovskii V., Minkov K. N.
The results of an experimental study of a sensor designed to detect and measure the concentration of nanoparticles in an aqueous medium based on optical dielectric microresonators with "whispering gallery" modes are presented. The change in the frequency and Q of the eigenmodes of the microresonator was studied in its interaction with silver nanoparticles. It is shown that this type of sensor can be used to measure extremely small concentrations of nanoparticles.
Priority areas:
engineering science
Language:
Russian
Y G Vainer, Калмыков А. С., Melentiev P. N. et al., Laser Physics Letters 2020 Vol. 17 No. 10 P. 105901
We offer and demonstrate a new type of plasmonic metasurface for sensorics and
surface-enhanced Raman spectroscopy (SERS) spectroscopy, characterized by a wide spectral
range of sensitivity from 450 nm to 850 nm. The metasurface is formed by Ag nanoparticles of
different sizes. The metasurface has clear anisotropy formed by the Ag nanoparticles’
size-dependent plasmonic resonances. The resonant wavelength of ...
Added: January 17, 2021
Loganathan N., Bowers G. M., Ngouana-Wakou B. F. et al., Physical Chemistry Chemical Physics 2019 Vol. 21 P. 6917-6924
The interactions among fluid species such as H2O, CO2, and CH4 confined in nano- and meso-pores in shales and other rocks is of central concern to understanding the chemical behavior and transport properties of these species in the earth’s subsurface and is of special concern to geological C-sequestration and enhanced production of oil and natural ...
Added: November 2, 2019
Pikalov A., Dorofeenko A., Yurii E. Lozovik, Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 98 No. 08-5134 P. 1-14
A method for finding dispersion in chains of plasmonic particles of arbitrary shape is proposed. Our approach is based on analytic continuation via polylogarithms and is basically a generalization of the method known for spherical nanoparticle chains. As an example, we consider an axial chain of split-ring resonators. Three distinct solutions are distinguished, namely, two ...
Added: October 22, 2018
Szczerba M., Kalinichev A. G., Kowalik M., Applied Clay Science 2020 Vol. 188 P. 105497
The siloxane surface of uncharged clays is known to be hydrophobic, which is supported by strong experimental and theoretical evidence. For the siloxane surface of charged clays, like smectites, the picture is not as clear. We are aiming to clarify this issue by molecular simulations in which smectite surface hydrophobicity is quantified through the separate ...
Added: February 26, 2020
Syomin B., Самуйленко А. Я., Эпизоотология, иммунобиология, фармакология и санитария 2017 № 1 С. 48-56
The review deals with the latest approaches which are used for the development of modern vaccines. Vaccinomics as a tool to design the vaccines which determined by immunome is discussed here on example of actual foreign researches and authors' own studies. ...
Added: March 1, 2017
Loganathan N., Yazaydin A. O., Bowers G. M. et al., Journal of Physical Chemistry C 2020 Vol. 124 P. 2490-2500
We performed constant reservoir composition molecular dynamics (CRC-MD) simulations at 323 K and 124 bar to quantitatively study the partitioning of fluid species between the nano- and mesopores of clay and a bulk reservoir containing an equimolar mixture of CO2 and CH4. The results show that the basal (001) and protonated edge (010) surfaces of ...
Added: February 26, 2020
Syomin B., Ветеринария и кормление 2014 Т. 6 С. 50-51
The work reveals the possibility of purification of recombinant nanoparticles from bacterial lysates without the use of ultracentrifugation ...
Added: September 27, 2017
Pouvreau M., Greathouse J. A., Cygan R. T. et al., Journal of Physical Chemistry C 2019 Vol. 123 P. 11628-11638
Toward the development of classical force fields for the accurate modeling of clay mineral-water systems, we have extended the use of metal–O–H (M–O–H) angle bending terms to describe surface Si–O–H bending for hydrated kaolinite edge structures. Kaolinite, comprising linked octahedral Al and tetrahedral Si sheets, provides a rigorous test by combining aluminol and silanol groups ...
Added: November 2, 2019
Ay A. N., Zumreoglu-Karan, B., Kalinichev A. G. et al., Journal of Porous Materials 2020 Vol. 27 P. 735-743
Magnetic nanocomposites involving tetraborate ion (TB)-intercalated Mg–Al-layered double hydroxide (LDH) shell supported on magnesium ferrite core particles are synthesized, characterized, and compared with their non-magnetic analogues. The compositions of the obtained nanocomposites were determined and structural investigations were made by powder X-ray diffraction and Fourier transform infrared spectroscopy. Particle characteristics were examined by size distribution, ...
Added: February 26, 2020
Kraevsky S. V., Tournassat C., Vayer M. et al., Applied Clay Science 2020 Vol. 186 Article 105442
Statistical information on the edge surface area and edge crystallographic orientation of clay nanoparticle surfaces is essential for proper accounting of the protonation-deprotonation reactions as a part of mechanistic surface complexation models. A combination of atomic-force microscopy (AFM) measurements and molecular dynamics computer simulations made it possible to quantify the relative contributions of the most ...
Added: February 26, 2020
Demenev A. A., Brichkin A. S., Gavrilov S. et al., Semiconductors 2018 Vol. 52 No. 14 P. 1827-1832
The dynamically compressed coherent exciton-polariton condensate state was implemented at the low polariton (LP) band bottom in GaAs microcavity resonantly excited in a wide range of wavevectors by the convergent 2.5-ps long Gaussian linearly polarized beam when the active region of the cavity was ahead of the waist. Formation of the dynamically compressed condensate state ...
Added: February 12, 2019
Egorysheva A. V., Kraev A. S., Gajtko O. M. et al., Powder Technology 2020 Vol. 360 P. 96-103
We report on the first experimental evidence of the electrorheological effect in suspensions of superfine pyrochlore-type Bi1.8Fe1.2SbO7 powders. Tensile-compressive and shear stress studies of the electrorheological fluids, with various filler contents, revealed an exceptionally high electrorheological effect in the materials – the tensile yield strength at 5 kV/mm reached about 20 kPa. The frequency dependencies of dielectric permittivity, ...
Added: May 27, 2020
Koniakhin S., Oleg I. Utesov, Yashenkin A., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 No. 20 P. 205422
Disorder-induced broadening of optical vibrational eigenmodes in nanoparticles of nonpolar crystals is studied
numerically. The methods previously used to treat the phonons in defectless particles are adjusted for numerical
evaluation of the disordered problem. Imperfections in the forms of Gaussian and binary disorders as well
as surface irregularities are investigated thoroughly in a wide range of impurity concentrations ...
Added: January 14, 2021
Tarasov B., Arbuzov A., Volodin A. et al., Journal of Alloys and Compounds 2022 Vol. 896 Article 162881
The paper presents a review of the authors’ studies of advanced functional composites of graphene based materials with metals, alloys, intermetallic compounds and their hydrides, and on the creation on their basis of hydrogen-storage materials for a compact and safe hydrogen storage, electrode materials for nickel- metal hydride batteries, highly efficient catalysts for the hydrogenation ...
Added: December 28, 2021
Syomin Boris, Ilyin Y., Молекулярная биология 2019 Т. 53 № 3 С. 367-379
The paper discusses the techniques which are currently implemented for vaccine production based on virus-like particles (VLPs). The factors which determine the characteristics of VLP monomers assembly are provided in detail. Analysis of the literature demonstrates that the development of the techniques of VLP production and immobilization of target antigens on their surface have led ...
Added: December 27, 2018
Kharazmi A., Priezjev N., Journal of Physical Chemistry B 2017 Vol. 121 P. 7133-7139
Molecular dynamics simulations are carried out to study the translational and rotational diffusion of
a single Janus particle immersed in a dense Lennard-Jones fluid. We consider a spherical particle
with two hemispheres of different wettabilities. The analysis of the particle dynamics is based
on the time-dependent orientation tensor, particle displacement, as well as the translational and
angular velocity autocorrelation ...
Added: October 18, 2017
Goryainov V., Известия высших учебных заведений. Физика 2010 Т. 53 № 12-2 С. 99-102
Представлен ряд схем генераторов наноструктурированных систем, включая аэрозоли, ультрадисперсные порошки (УДП), композитные материалы. В качестве рабочего тела использовались растворы, суспензии, гидрозоли, мелкодисперсные порошки. Для получения наноструктурированных материалов, таких, как аэровзвеси санитарного и метеоэкологического применения в атмосфере, УДП металлов и сплавов композиционных монолитов и покрытий, разработаны струйно-форсуночные, сопловые и плазменные генераторы с включением методов переконденсации исходного ...
Added: March 15, 2019
Minkov K. N., Likhachev G. V., Pavlov N. G. et al., Journal of Optical Technology (A Translation of Opticheskii Zhurnal) 2021 Vol. 88 No. 6 P. 348-353
A method for the fabrication of high-Q crystalline whispering gallery mode optical microresonators using diamond turning and further asymptotic abrasive polishing is developed and described. The proposed method allows the fabrication of microresonators with a predefined geometry and a Q-factor higher than 107. A step-by-step fabrication procedure is presented, important parameters ensuring the optimal quality ...
Added: August 31, 2021
Kharazmi A., Priezjev N., Journal of Chemical Physics 2015 Vol. 142 P. 234503
Molecular dynamics simulations are carried out to study the translational and rotational diffusion of a single Janus particle immersed in a dense Lennard-Jones fluid. We consider a spherical particle with two hemispheres of different wettabilities. The analysis of the particle dynamics is based on the time-dependent orientation tensor, particle displacement, as well as the translational ...
Added: December 6, 2017
Koniakhin S., Utesov O., Yashenkin A., Physical Review Research 2023 Vol. 5 No. 1 Article 013153
Modification of optical phonon spectra in contacting nonpolar nanoparticles compared to single particles is studied. Optical phonons in dielectric and semiconducting particles obey the Euclidean metric Klein-Fock-Gordon equation with Dirichlet boundary conditions. This equation is supposed to be solved numerically for manifolds of cojoined spheres. It is proposed to replace this problem with the simpler-to-solve ...
Added: March 6, 2023
Ermakov A., Popov A., Ermakova O. et al., Materials Science and Engineering C 2019 Vol. 104 P. 109924
We report the first experimental evidence for the mitogenic action of cerium(IV) oxide and cerium(III) fluoride nanoparticles (CONs and CFNs) on the regeneration of a whole organism – freshwater flatworms Schmidtea mediterranea (planarian). Both types of cerium-containing nanoparticles are shown to be a highly potent mitogen for planaria. Both CONs and CFNs, in micro- and nanomolar concentrations, ...
Added: May 27, 2020
Golubenko D. V., Shaydullin R., Yaroslavtsev A. B., Colloid and Polymer Science 2019 Vol. 297 No. 5 P. 741-748
In the present paper, the influence of acid–base properties of inorganic particles in ion-exchange membrane-based nanocomposites on their physicochemical and transport properties was investigated. For this purpose, particles of Zr, Ti, and Si oxides have been synthesized in situ in the system of pores and channels of the membranes. Depending on the acid–base properties of ...
Added: November 18, 2019
Томск : Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет", 2010
Представлен ряд схем генераторов наноструктурированных систем, включая аэрозоли, ультрадисперсные порошки (УДП), композитные материалы. В качестве рабочего тела использовались растворы, суспензии, гидрозоли, мелкодисперсные порошки. Для получения наноструктурированных материалов, таких, как аэровзвеси санитарного и метеоэкологического применения в атмосфере, УДП металлов и сплавов композиционных монолитов и покрытий, разработаны струйно-форсуночные, сопловые и плазменные генераторы с включением методов переконденсации исходного ...
Added: March 15, 2019
Калмыкова Т. П., Костина Ю. В., Ильин С. О. et al., Высокомолекулярные соединения. Серия Б 2020 Т. 62 № 1 С. 68-80
Dispersions based on sodium hyaluronate and hydroxyapatite, which is synthesized both by the classical method in an aqueous medium to obtain submicron particles and in a bioactive hyaluronan medium with the formation of nanosized particles, are obtained. The synthesized hydroxyapatite nanoparticles have a complex structure based on a monodentate complex hyaluronan–Ca2+ which remains in the dispersion ...
Added: January 29, 2023