Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene

Abstract Magnetism in graphene has stimulated extensive studies to search for novel metal-free magnetic device. In this paper, we use a synthesis method far from equilibrium state named self-propagating high temperature synthesis (SHS) to produce few-layer graphene with different defect contents and...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Qinghua Miao, Lidong Wang, Zhaoyuan Liu, Bing Wei, Jinhui Wang, Xiangli Liu, Weidong Fei
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0a35059835ed41cf9ed22c6fa0a5ff9b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:0a35059835ed41cf9ed22c6fa0a5ff9b
record_format	dspace
spelling	oai:doaj.org-article:0a35059835ed41cf9ed22c6fa0a5ff9b2021-12-02T11:51:13ZEffect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene10.1038/s41598-017-06224-w2045-2322https://doaj.org/article/0a35059835ed41cf9ed22c6fa0a5ff9b2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06224-whttps://doaj.org/toc/2045-2322Abstract Magnetism in graphene has stimulated extensive studies to search for novel metal-free magnetic device. In this paper, we use a synthesis method far from equilibrium state named self-propagating high temperature synthesis (SHS) to produce few-layer graphene with different defect contents and then use a heat treatment process (vacuum-annealing and air-cooling) to further control the defects in graphene. We find that the type and content of defects in graphene can be controlled by adjusting the mole ratio of reactants (Mg: CaCO3) for SHS reaction and the temperature of the subsequent heat treatment. The deviation of the ratio of reactants from stoichiometric ratio benefits the production of graphene with higher concentration of defects. It is indicated that the temperature of the heat treatment has remarkable influences on the structure of graphene, Raman-sensitive defects can be recovered partly by heat treatment while IR-sensitive defects are closely related with the oxidation and decomposition of the oxygen-containing groups at elevated temperature. This work indicates that SHS is a promising method to produce graphene with special magnetism, and the heat treatment is an effective way to further adjust the magnetism of graphene. This work sheds light on the study to develop carbon materials with controlled ferromagnetism.Qinghua MiaoLidong WangZhaoyuan LiuBing WeiJinhui WangXiangli LiuWeidong FeiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qinghua Miao Lidong Wang Zhaoyuan Liu Bing Wei Jinhui Wang Xiangli Liu Weidong Fei Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
description	Abstract Magnetism in graphene has stimulated extensive studies to search for novel metal-free magnetic device. In this paper, we use a synthesis method far from equilibrium state named self-propagating high temperature synthesis (SHS) to produce few-layer graphene with different defect contents and then use a heat treatment process (vacuum-annealing and air-cooling) to further control the defects in graphene. We find that the type and content of defects in graphene can be controlled by adjusting the mole ratio of reactants (Mg: CaCO3) for SHS reaction and the temperature of the subsequent heat treatment. The deviation of the ratio of reactants from stoichiometric ratio benefits the production of graphene with higher concentration of defects. It is indicated that the temperature of the heat treatment has remarkable influences on the structure of graphene, Raman-sensitive defects can be recovered partly by heat treatment while IR-sensitive defects are closely related with the oxidation and decomposition of the oxygen-containing groups at elevated temperature. This work indicates that SHS is a promising method to produce graphene with special magnetism, and the heat treatment is an effective way to further adjust the magnetism of graphene. This work sheds light on the study to develop carbon materials with controlled ferromagnetism.
format	article
author	Qinghua Miao Lidong Wang Zhaoyuan Liu Bing Wei Jinhui Wang Xiangli Liu Weidong Fei
author_facet	Qinghua Miao Lidong Wang Zhaoyuan Liu Bing Wei Jinhui Wang Xiangli Liu Weidong Fei
author_sort	Qinghua Miao
title	Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
title_short	Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
title_full	Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
title_fullStr	Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
title_full_unstemmed	Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
title_sort	effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0a35059835ed41cf9ed22c6fa0a5ff9b
work_keys_str_mv	AT qinghuamiao effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT lidongwang effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT zhaoyuanliu effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT bingwei effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT jinhuiwang effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT xiangliliu effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene AT weidongfei effectofdefectscontrolledbypreparationconditionandheattreatmentontheferromagneticpropertiesoffewlayergraphene
_version_	1718395146983178240

Effect of defects controlled by preparation condition and heat treatment on the ferromagnetic properties of few-layer graphene

Ejemplares similares