X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles

Methods for the quantitative assessment of the content of ordered structures in the products of synthesis of fulleroid materials based on the spectra of characteristic X-ray radiation and X-ray diffraction are considered. The introduction shows that the use of carbon fulleroid materials (fullerenes,...

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Main Authors: Dmitry G. Letenko, Yury V. Pukharenko, Irina U. Aubakirova
Format: Article
Language:English
Published: OOO "CNT «NanoStroitelstvo» 2021-04-01
Series:Нанотехнологии в строительстве
Subjects:
Online Access:http://nanobuild.ru/en_EN/journal/Nanobuild-2-2021/52-62.pdf
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author Dmitry G. Letenko
Yury V. Pukharenko
Irina U. Aubakirova
author_facet Dmitry G. Letenko
Yury V. Pukharenko
Irina U. Aubakirova
author_sort Dmitry G. Letenko
collection DOAJ
description Methods for the quantitative assessment of the content of ordered structures in the products of synthesis of fulleroid materials based on the spectra of characteristic X-ray radiation and X-ray diffraction are considered. The introduction shows that the use of carbon fulleroid materials (fullerenes, fullerenols and their compounds, fulleroid nanoparticles) as modifiers of the properties of various structural materials and plasticizers of concrete mixes is currently one of the most rapidly developing areas in the field of nanotechnology in construction. Methods and materials. In this work, the following analytical control methods were used: scanning microscopy, local X-ray spectral analysis and X-ray diffractometry. The products of synthesis of fulleroid materials were studied: samples of fullerene-containing soot collected at different distances from the arc synthesis zone. Results. Raster images of the synthesis products with various magnifications are shown, as well as the X-ray fluorescence spectra and the elemental composition of the synthesis products. The X-ray phase analysis of the synthesis products was carried out. It is shown that the analysis of the amorphous component of the composition, which is one of the products of the yield, will make it possible to control the synthesis at each stage and under various conditions of its implementation. Analysis of a nonlinear dynamic system. To construct an attractor of a dynamic system, the correlation dimension, the dimension of the phase space and the fractal dimension of the process under study were calculated. The correlation dimension and the dimension of the phase space were calculated using the Takens’ method. The fractal dimension is calculated using the Hurst exponent. Conclusions. To study the dynamics of chemical reactions occurring during arc synthesis, the system of differential Rössler attractor is used. A solution to this system is obtained – Rössler attractor – an attracting set of trajectories in the phase space, which is identical in appearance to the process under study, which makes it possible to estimate, relying on attractors characteristic of each sample (synthesis material), at what stage the synthesis process occurs, and by making differential model, to organize the control to improve the quality of output products. Thus, the possibility of evaluating the efficiency of the synthesis of fulleroids used for the modification of building materials is demonstrated.
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spelling doaj.art-fad0f54a13534646a94217b65a323cdd2022-12-21T22:53:06ZengOOO "CNT «NanoStroitelstvo»Нанотехнологии в строительстве2075-85452021-04-01132526210.15828/2075-8545-2021-13-2-52-62X-ray spectral methods for measuring the degree of ordering of carbon nanoparticlesDmitry G. Letenko0https://orcid.org/0000-0002-1130-6158Yury V. Pukharenko1https://orcid.org/0000-0003-1989-0595Irina U. Aubakirova2https://orcid.org/0000-0003-4394-5453Saint Petersburg State University of Architecture and Civil Engineering, Saint-Petersburg, RussiaSaint Petersburg State University of Architecture and Civil Engineering, Saint-Petersburg, RussiaSaint Petersburg State University of Architecture and Civil Engineering, Saint-Petersburg, RussiaMethods for the quantitative assessment of the content of ordered structures in the products of synthesis of fulleroid materials based on the spectra of characteristic X-ray radiation and X-ray diffraction are considered. The introduction shows that the use of carbon fulleroid materials (fullerenes, fullerenols and their compounds, fulleroid nanoparticles) as modifiers of the properties of various structural materials and plasticizers of concrete mixes is currently one of the most rapidly developing areas in the field of nanotechnology in construction. Methods and materials. In this work, the following analytical control methods were used: scanning microscopy, local X-ray spectral analysis and X-ray diffractometry. The products of synthesis of fulleroid materials were studied: samples of fullerene-containing soot collected at different distances from the arc synthesis zone. Results. Raster images of the synthesis products with various magnifications are shown, as well as the X-ray fluorescence spectra and the elemental composition of the synthesis products. The X-ray phase analysis of the synthesis products was carried out. It is shown that the analysis of the amorphous component of the composition, which is one of the products of the yield, will make it possible to control the synthesis at each stage and under various conditions of its implementation. Analysis of a nonlinear dynamic system. To construct an attractor of a dynamic system, the correlation dimension, the dimension of the phase space and the fractal dimension of the process under study were calculated. The correlation dimension and the dimension of the phase space were calculated using the Takens’ method. The fractal dimension is calculated using the Hurst exponent. Conclusions. To study the dynamics of chemical reactions occurring during arc synthesis, the system of differential Rössler attractor is used. A solution to this system is obtained – Rössler attractor – an attracting set of trajectories in the phase space, which is identical in appearance to the process under study, which makes it possible to estimate, relying on attractors characteristic of each sample (synthesis material), at what stage the synthesis process occurs, and by making differential model, to organize the control to improve the quality of output products. Thus, the possibility of evaluating the efficiency of the synthesis of fulleroids used for the modification of building materials is demonstrated.http://nanobuild.ru/en_EN/journal/Nanobuild-2-2021/52-62.pdffulleroidsx-ray spectral analysisdiffractometryattractorhurst exponentphase spacefractal dimensiondynamic system
spellingShingle Dmitry G. Letenko
Yury V. Pukharenko
Irina U. Aubakirova
X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
Нанотехнологии в строительстве
fulleroids
x-ray spectral analysis
diffractometry
attractor
hurst exponent
phase space
fractal dimension
dynamic system
title X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
title_full X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
title_fullStr X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
title_full_unstemmed X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
title_short X-ray spectral methods for measuring the degree of ordering of carbon nanoparticles
title_sort x ray spectral methods for measuring the degree of ordering of carbon nanoparticles
topic fulleroids
x-ray spectral analysis
diffractometry
attractor
hurst exponent
phase space
fractal dimension
dynamic system
url http://nanobuild.ru/en_EN/journal/Nanobuild-2-2021/52-62.pdf
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