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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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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 |
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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 |
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