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Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films

The possibility of a new technique for fabricating nanoparticles from thin films using selective oxidation in an atmosphere mixture of water vapor and hydrogen was investigated. Fe-5wt.%Al films were RF-sputtered and annealed in the atmosphere mixture at 900°C for up to 200 min, in order to oxidize...

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Autores principales: Jang, Pyungwoo, Shin, Seungchan, Jung, Chip-Sup, Kim, Kwang-Ho, Seomoon, Kyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3626945/
https://www.ncbi.nlm.nih.gov/pubmed/23547781
http://dx.doi.org/10.1186/1556-276X-8-152
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author Jang, Pyungwoo
Shin, Seungchan
Jung, Chip-Sup
Kim, Kwang-Ho
Seomoon, Kyu
author_facet Jang, Pyungwoo
Shin, Seungchan
Jung, Chip-Sup
Kim, Kwang-Ho
Seomoon, Kyu
author_sort Jang, Pyungwoo
collection PubMed
description The possibility of a new technique for fabricating nanoparticles from thin films using selective oxidation in an atmosphere mixture of water vapor and hydrogen was investigated. Fe-5wt.%Al films were RF-sputtered and annealed in the atmosphere mixture at 900°C for up to 200 min, in order to oxidize aluminum selectively. Thermodynamics simulation showed that temperatures exceeding 800°C are necessary to prevent iron from being oxidized, as confirmed by the depth profile of XPS. As the annealing time increased, the morphology of the 200-nm Fe-Al films changed from the continuous to the discontinuous type; thus, particulate Fe-Al films formed after 100 min. The particulate 10- to 100-nm Fe-Al films showed super-paramagnetic behavior after the oxidation. Thus, a new technique for fabricating nanoparticles was successfully introduced using selective oxidation.
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spelling pubmed-36269452013-04-16 Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films Jang, Pyungwoo Shin, Seungchan Jung, Chip-Sup Kim, Kwang-Ho Seomoon, Kyu Nanoscale Res Lett Nano Express The possibility of a new technique for fabricating nanoparticles from thin films using selective oxidation in an atmosphere mixture of water vapor and hydrogen was investigated. Fe-5wt.%Al films were RF-sputtered and annealed in the atmosphere mixture at 900°C for up to 200 min, in order to oxidize aluminum selectively. Thermodynamics simulation showed that temperatures exceeding 800°C are necessary to prevent iron from being oxidized, as confirmed by the depth profile of XPS. As the annealing time increased, the morphology of the 200-nm Fe-Al films changed from the continuous to the discontinuous type; thus, particulate Fe-Al films formed after 100 min. The particulate 10- to 100-nm Fe-Al films showed super-paramagnetic behavior after the oxidation. Thus, a new technique for fabricating nanoparticles was successfully introduced using selective oxidation. Springer 2013-04-02 /pmc/articles/PMC3626945/ /pubmed/23547781 http://dx.doi.org/10.1186/1556-276X-8-152 Text en Copyright ©2013 Jang et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Jang, Pyungwoo
Shin, Seungchan
Jung, Chip-Sup
Kim, Kwang-Ho
Seomoon, Kyu
Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title_full Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title_fullStr Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title_full_unstemmed Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title_short Fabrication of Fe-Al nanoparticles by selective oxidation of Fe-Al thin films
title_sort fabrication of fe-al nanoparticles by selective oxidation of fe-al thin films
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3626945/
https://www.ncbi.nlm.nih.gov/pubmed/23547781
http://dx.doi.org/10.1186/1556-276X-8-152
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