Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils

The role of the inert gas during CVD-graphene growth over polycrystalline nickel foils is reported. Nitrogen, hydrogen and methane were used as inert, reduction and carbonaceous gases, respectively. Graphene samples were characterized by using Optical Microscopy, Raman Spectroscopy and SEM equipped...

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Detalles Bibliográficos
Autores: Lavín López, María del Prado, Valverde, Jose Luis, Ordoñez Lozoya, S., Patón Carrero, Antonio, Romero Izquierdo, Amaya
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29834
Acceso en línea:http://hdl.handle.net/10578/29834
Access Level:acceso abierto
Palabra clave:CVD-graphene
Polycrystalline nickel foils
Nitrogen influence
Factorial design
CVD-grafeno
Láminas de níquel policristalino
Influencia del nitrógeno
Diseño factorial
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spelling Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foilsLavín López, María del PradoValverde, Jose LuisOrdoñez Lozoya, S.Patón Carrero, AntonioRomero Izquierdo, AmayaCVD-graphenePolycrystalline nickel foilsNitrogen influenceFactorial designCVD-grafenoLáminas de níquel policristalinoInfluencia del nitrógenoDiseño factorialThe role of the inert gas during CVD-graphene growth over polycrystalline nickel foils is reported. Nitrogen, hydrogen and methane were used as inert, reduction and carbonaceous gases, respectively. Graphene samples were characterized by using Optical Microscopy, Raman Spectroscopy and SEM equipped with EDX. Four different colors were distinguished over the optical microscope images. These colors were analyzed by Raman Spectroscopy and correlated to each type of graphene deposited over the foil (monolayer, bilayer, few-layers and multilayer). An Excel-VBA application was developed, which was used for computing the percentage of each type of graphene, resulting in an estimation of the graphene quality value. It was verified that the incorporation of the inert gas in the reaction step during CVD-graphene synthesis greatly influenced the quality of the obtained graphene. Different temperatures and percentages of nitrogen were studied in order to define the optimal reaction conditions. A factorial design study was performed to find the best experimental conditions leading to the highest quality graphene value, which resulted to be the following ones: 947 °C and 13 vol % of nitrogen in the feed stream, 1 min of reaction time, a relation between CH4 and H2 of 0.07 v/v, and a total flow of gases of 80 Nml/min.Se informa sobre el papel del gas inerte durante el crecimiento de CVD-grafeno sobre láminas de níquel policristalino . Se utilizaron nitrógeno, hidrógeno y metano como gases inertes, de reducción y carbonosos, respectivamente. Las muestras de grafeno se caracterizaron utilizando Microscopía Óptica, Espectroscopía Raman y SEM equipado con EDX .. Se distinguieron cuatro colores diferentes sobre las imágenes del microscopio óptico. Estos colores se analizaron mediante espectroscopia Raman y se correlacionaron con cada tipo de grafeno depositado sobre la lámina (monocapa, bicapa, pocas capas y multicapa). Se desarrolló una aplicación Excel-VBA, la cual se utilizó para calcular el porcentaje de cada tipo de grafeno, dando como resultado una estimación del valor de la calidad del grafeno. Se comprobó que la incorporación del gas inerte en el paso de reacción durante la síntesis de CVD-grafeno influyó mucho en la calidad del grafeno obtenido. Se estudiaron diferentes temperaturas y porcentajes de nitrógeno para definir las condiciones óptimas de reacción. Se realizó un estudio de diseño factorial para encontrar las mejores condiciones experimentales que conduzcan al valor de grafeno de mayor calidad, las cuales resultaron ser las siguientes:4 y H 2 de 0,07 v/v, y un caudal total de gases de 80 Nml/min.Elsevier202220222019info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29834reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaEspañolinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/298342026-05-27T07:36:41Z
dc.title.none.fl_str_mv Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
title Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
spellingShingle Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
Lavín López, María del Prado
CVD-graphene
Polycrystalline nickel foils
Nitrogen influence
Factorial design
CVD-grafeno
Láminas de níquel policristalino
Influencia del nitrógeno
Diseño factorial
title_short Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
title_full Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
title_fullStr Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
title_full_unstemmed Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
title_sort Role of inert gas in the Cvd-graphene synthesis over polycrystalline nickel foils
dc.creator.none.fl_str_mv Lavín López, María del Prado
Valverde, Jose Luis
Ordoñez Lozoya, S.
Patón Carrero, Antonio
Romero Izquierdo, Amaya
author Lavín López, María del Prado
author_facet Lavín López, María del Prado
Valverde, Jose Luis
Ordoñez Lozoya, S.
Patón Carrero, Antonio
Romero Izquierdo, Amaya
author_role author
author2 Valverde, Jose Luis
Ordoñez Lozoya, S.
Patón Carrero, Antonio
Romero Izquierdo, Amaya
author2_role author
author
author
author
dc.subject.none.fl_str_mv CVD-graphene
Polycrystalline nickel foils
Nitrogen influence
Factorial design
CVD-grafeno
Láminas de níquel policristalino
Influencia del nitrógeno
Diseño factorial
topic CVD-graphene
Polycrystalline nickel foils
Nitrogen influence
Factorial design
CVD-grafeno
Láminas de níquel policristalino
Influencia del nitrógeno
Diseño factorial
description The role of the inert gas during CVD-graphene growth over polycrystalline nickel foils is reported. Nitrogen, hydrogen and methane were used as inert, reduction and carbonaceous gases, respectively. Graphene samples were characterized by using Optical Microscopy, Raman Spectroscopy and SEM equipped with EDX. Four different colors were distinguished over the optical microscope images. These colors were analyzed by Raman Spectroscopy and correlated to each type of graphene deposited over the foil (monolayer, bilayer, few-layers and multilayer). An Excel-VBA application was developed, which was used for computing the percentage of each type of graphene, resulting in an estimation of the graphene quality value. It was verified that the incorporation of the inert gas in the reaction step during CVD-graphene synthesis greatly influenced the quality of the obtained graphene. Different temperatures and percentages of nitrogen were studied in order to define the optimal reaction conditions. A factorial design study was performed to find the best experimental conditions leading to the highest quality graphene value, which resulted to be the following ones: 947 °C and 13 vol % of nitrogen in the feed stream, 1 min of reaction time, a relation between CH4 and H2 of 0.07 v/v, and a total flow of gases of 80 Nml/min.
publishDate 2019
dc.date.none.fl_str_mv 2019
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29834
url http://hdl.handle.net/10578/29834
dc.language.none.fl_str_mv Español
language_invalid_str_mv Español
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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