Cargando…

Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth

The paper presents a theoretical model of the catalytic centers formation processes during annealing of multilayer nanosized metal films for carbon nanotubes growth. The approach to the description of the model is based on the mass transfer processes under the influence of mechanical thermoelastic s...

Descripción completa

Detalles Bibliográficos
Autores principales: Il’in, Oleg I., Rudyk, Nikolay N., Fedotov, Alexandr A., Il’ina, Marina V., Cherednichenko, Dmitriy I., Ageev, Oleg A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153372/
https://www.ncbi.nlm.nih.gov/pubmed/32204498
http://dx.doi.org/10.3390/nano10030554
_version_ 1783521639801028608
author Il’in, Oleg I.
Rudyk, Nikolay N.
Fedotov, Alexandr A.
Il’ina, Marina V.
Cherednichenko, Dmitriy I.
Ageev, Oleg A.
author_facet Il’in, Oleg I.
Rudyk, Nikolay N.
Fedotov, Alexandr A.
Il’ina, Marina V.
Cherednichenko, Dmitriy I.
Ageev, Oleg A.
author_sort Il’in, Oleg I.
collection PubMed
description The paper presents a theoretical model of the catalytic centers formation processes during annealing of multilayer nanosized metal films for carbon nanotubes growth. The approach to the description of the model is based on the mass transfer processes under the influence of mechanical thermoelastic stresses, which arise due to the difference in the thermal expansion coefficients of the substrate materials and nanosized metal layers. The thermal stress gradient resulting from annealing creates a drop in the chemical potential over the thickness of the film structure. This leads to the initiation of diffusion mass transfer between the inner and outer surfaces of the films. As a result, the outer surface begins to corrugate and fragment, creating separate islands, which serve as the basis for the catalytic centers formation. Experimental research on the formation of catalytic centers in the structure of Ni/Cr/Si was carried out. It is demonstrated that the proposed model allows to predict the geometric dimensions of the catalytic centers before growing carbon nanotubes. The results can be used to create micro- and nanoelectronics devices based on carbon nanotube arrays.
format Online
Article
Text
id pubmed-7153372
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-71533722020-04-20 Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth Il’in, Oleg I. Rudyk, Nikolay N. Fedotov, Alexandr A. Il’ina, Marina V. Cherednichenko, Dmitriy I. Ageev, Oleg A. Nanomaterials (Basel) Article The paper presents a theoretical model of the catalytic centers formation processes during annealing of multilayer nanosized metal films for carbon nanotubes growth. The approach to the description of the model is based on the mass transfer processes under the influence of mechanical thermoelastic stresses, which arise due to the difference in the thermal expansion coefficients of the substrate materials and nanosized metal layers. The thermal stress gradient resulting from annealing creates a drop in the chemical potential over the thickness of the film structure. This leads to the initiation of diffusion mass transfer between the inner and outer surfaces of the films. As a result, the outer surface begins to corrugate and fragment, creating separate islands, which serve as the basis for the catalytic centers formation. Experimental research on the formation of catalytic centers in the structure of Ni/Cr/Si was carried out. It is demonstrated that the proposed model allows to predict the geometric dimensions of the catalytic centers before growing carbon nanotubes. The results can be used to create micro- and nanoelectronics devices based on carbon nanotube arrays. MDPI 2020-03-19 /pmc/articles/PMC7153372/ /pubmed/32204498 http://dx.doi.org/10.3390/nano10030554 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Il’in, Oleg I.
Rudyk, Nikolay N.
Fedotov, Alexandr A.
Il’ina, Marina V.
Cherednichenko, Dmitriy I.
Ageev, Oleg A.
Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title_full Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title_fullStr Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title_full_unstemmed Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title_short Modeling of Catalytic Centers Formation Processes during Annealing of Multilayer Nanosized Metal Films for Carbon Nanotubes Growth
title_sort modeling of catalytic centers formation processes during annealing of multilayer nanosized metal films for carbon nanotubes growth
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153372/
https://www.ncbi.nlm.nih.gov/pubmed/32204498
http://dx.doi.org/10.3390/nano10030554
work_keys_str_mv AT ilinolegi modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth
AT rudyknikolayn modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth
AT fedotovalexandra modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth
AT ilinamarinav modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth
AT cherednichenkodmitriyi modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth
AT ageevolega modelingofcatalyticcentersformationprocessesduringannealingofmultilayernanosizedmetalfilmsforcarbonnanotubesgrowth