Knyazkova, Anastasia I.

Nikolaev, Viktor V.

Ponomarev, A. N.

Rezvanova, A. E.

English

Tomsk State University Repository

PULSED LASERS AND LASER APPLICATIONSTHE 15th  INTERNATIONAL CONFERENCEThe 15th International Conference AMPL-2021 PULSED LASERS AND LASER APPLICATIONS September 12–17, 2021 Tomsk, Russia ABSTRACTS GENERAL SPONSOR Special Systems. Photonics, St. Petersburg, Russia CONFERENCE ORGANIZERS Institute of Atmospheric Optics SB RAS Institute of High Current Electronics SB RAS Tomsk State University Tomsk Polytechnic University CONFERENCE SPONSORS Ministry of Education and Science of Russian Federation, Russia Russian Academy of Sciences, Russia Siberian Branch of Russian Academy of Science, Russia Laser Association, Russia  CONFERENCE SPONSORS TOPAZ Research and Inculcation Enterprise, Tomsk, Russia Young Scientists Counsil IAO SB RAS, Tomsk, Russia SP Equipment, Novosibirsk, Russia Azimut Photonics, Moscow, Russia LOTIS TII, Minsk, Belarus Special Systems. Photonics, St.-Petersburg, Russia CLZ Ltd, Moscow, Russia Leningrad Laser Systems, St.-Petersburg, Russia MEDIA SPONSORS Atmospheric and Oceanic Optics Journal, Tomsk, Russia Photonics Journal, Moscow, Russia  Tomsk, 2021  124  BIOPHOTONICS SESSION G  G-13 DETERMINATION OF POROSITY OF CERAMIC MATERIALS  BY TERAHERTZ SPECTROSCOPY A.E. Rezvanova1, A.I. Knyazkova1,3, V.V. Nikolaev2, and A.N. Ponomarev1 1Institute of Strength Physics and Materials Science SB RAS, 2/4 Akademichesky Ave., 634055, Tomsk, Russia; 2Tomsk State University, 36 Lenin Ave., 634050, Tomsk, Russia, vik-nikol@bk.ru; 3Institute of Atmospheric Optics SB RAS, 1 Zuev Sq., 634055, Tomsk, Russia Until recently, there were practically no devices capable of measuring the porosity of materials in the terahertz range. This type of radiation is transparent, passing through many materials, such as wood, plastic, ceramics, but is absorbed by water and metal. It is also safe for the study of living organisms. In this study, we analyzed the porosity of ceramic pellets based on hydroxyapatite with additives of multi walled carbon nanotubes of various concentrations in range from 0 to 0.5 wt.%.  A relationship was found between the absorption coefficient and the porosity of the material. It was shown the promise of THz spectroscopy for express measurements of porosity in ceramic materials. The work was performed according to the Government research assignment for ISPMS SB RAS, Project FWRW-2021-0007 and supported by the Government of the Russian Federation (proposal No. 2020-220-08-2389 to support scientific research projects implemented under the supervision of leading scientists at Russian institutions, Russian institutions of higher education). G-14 LASER SPECTROSCOPY OF INTERACTIONS OF CARBON NANOPARTICLES WITH BIOMACROMOLECULES K.A. Laptinskiy, S.A. Burikov, M.Yu. Khmeleva, and T.A. Dolenko Moscow State University, 1/2 Leninskie Gory St., 119991, Moscow, Russia, laptinskiy@physics.msu.ru, sergey.burikov@gmail.com, khmeliova.maria@gmail.com, tdolenko@mail.ru The urgent task of modern biomedicine is the creation of effective and safe theranostic nanoagents. This requires a comprehensive study of the mechanisms of interaction of nanoparticles with the biological environment. Carbon nanoparticles, most of which are non-toxic and biocompatible, are promising materials for the creation of theranostic nanoagents. However, to date, questions about the mechanisms of interaction of carbon nanoparticles with molecules of the environment, including biological ones, are still open, which does not allow one to tell about the effectiveness and safety of new theranostic nanoagents. The work presents the results of studying the interactions of detonation nanodiamonds with biomacromolecules by laser spectroscopy (Raman scattering, coherent anti Stokes Raman scattering). The analysis of the obtained results made it possible to make the conclusions about the mechanisms of adsorption of biomacromolecules on the surface of nanodiamonds and to establish the conformational changes of molecules during their interaction with the surface of nanoparticles using vibrational spectra. This study was supported by the Russian Science Foundation (Project No. 20-72-00144). 

Determination of porosity of ceramic materials by terahertz spectroscopy

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Determination of porosity of ceramic materials by terahertz spectroscopy

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