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A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process

Chemical vapor deposition (CVD) of carbon precursors employing a metal catalyst is a well-established method for synthesizing high-quality single-layer graphene. Yet the main challenge of the CVD process is the required transfer of a graphene layer from the substrate surface onto a chosen target sub...

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Autores principales: Krauß, Peter, Engstler, Jörg, Schneider, Jörg J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5629405/
https://www.ncbi.nlm.nih.gov/pubmed/29046849
http://dx.doi.org/10.3762/bjnano.8.202
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author Krauß, Peter
Engstler, Jörg
Schneider, Jörg J
author_facet Krauß, Peter
Engstler, Jörg
Schneider, Jörg J
author_sort Krauß, Peter
collection PubMed
description Chemical vapor deposition (CVD) of carbon precursors employing a metal catalyst is a well-established method for synthesizing high-quality single-layer graphene. Yet the main challenge of the CVD process is the required transfer of a graphene layer from the substrate surface onto a chosen target substrate. This process is delicate and can severely degrade the quality of the transferred graphene. The protective polymer coatings typically used generate residues and contamination on the ultrathin graphene layer. In this work, we have developed a graphene transfer process which works without a coating and allows the transfer of graphene onto arbitrary substrates without the need for any additional post-processing. During the course of our transfer studies, we found that the etching process that is usually employed can lead to contamination of the graphene layer with the Faradaic etchant component FeCl(3), resulting in the deposition of iron oxide Fe(x)O(y) nanoparticles on the graphene surface. We systematically analyzed the removal of the copper substrate layer and verified that crystalline iron oxide nanoparticles could be generated in controllable density on the graphene surface when this process is optimized. It was further confirmed that the Fe(x)O(y) particles on graphene are active in the catalytic growth of carbon nanotubes when employing a water-assisted CVD process.
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spelling pubmed-56294052017-10-18 A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process Krauß, Peter Engstler, Jörg Schneider, Jörg J Beilstein J Nanotechnol Full Research Paper Chemical vapor deposition (CVD) of carbon precursors employing a metal catalyst is a well-established method for synthesizing high-quality single-layer graphene. Yet the main challenge of the CVD process is the required transfer of a graphene layer from the substrate surface onto a chosen target substrate. This process is delicate and can severely degrade the quality of the transferred graphene. The protective polymer coatings typically used generate residues and contamination on the ultrathin graphene layer. In this work, we have developed a graphene transfer process which works without a coating and allows the transfer of graphene onto arbitrary substrates without the need for any additional post-processing. During the course of our transfer studies, we found that the etching process that is usually employed can lead to contamination of the graphene layer with the Faradaic etchant component FeCl(3), resulting in the deposition of iron oxide Fe(x)O(y) nanoparticles on the graphene surface. We systematically analyzed the removal of the copper substrate layer and verified that crystalline iron oxide nanoparticles could be generated in controllable density on the graphene surface when this process is optimized. It was further confirmed that the Fe(x)O(y) particles on graphene are active in the catalytic growth of carbon nanotubes when employing a water-assisted CVD process. Beilstein-Institut 2017-09-26 /pmc/articles/PMC5629405/ /pubmed/29046849 http://dx.doi.org/10.3762/bjnano.8.202 Text en Copyright © 2017, Krauß et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Krauß, Peter
Engstler, Jörg
Schneider, Jörg J
A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title_full A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title_fullStr A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title_full_unstemmed A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title_short A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
title_sort systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5629405/
https://www.ncbi.nlm.nih.gov/pubmed/29046849
http://dx.doi.org/10.3762/bjnano.8.202
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