Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/27159 |
Resumo: | Here we present a novel solvothermal synthesis approach for the accurate control over the structural features of nickel/reduced graphene oxide (Ni/rGO) nanocomposites for tuneable electrical properties. We discovered that the dynamic chemical structure of GO during reaction, acts as an active template for the controlled nanostructured growth of nickel nanoparticles (Ni NPs). Therefore, the precise control of reaction time offered the possibility to modulate nucleation and coalescence phenomena of Ni NPs, allowing in this way to precisely adjust their size, density and NiO@Ni structure on the final Ni/rGO nanocomposites. The electrophysical properties (work function and conductivity) of different Ni/rGO nanocomposites were determined and found to be directly dependent on the Ni NPs radius and also on the NiO buffer layer width. We confirmed a crucial role of the NiO buffer layer thickness at the Pt-NiO-Ni-NiO-rGO interface changing the conductivity from metallic to those specific to a Schottky contact or to a p-n heterojunction. These new findings reveal a relevant potential for using Ni/rGO nanocomposites as a versatile and promising material for micro-, nano- and optoelectronics as well as for energy storage technologies. |
id |
RCAP_8e1490d5bb7add77678b29342cc22f52 |
---|---|
oai_identifier_str |
oai:ria.ua.pt:10773/27159 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical propertiesNickel/graphene nanocompositesSolvothermal methodElectrical propertiesKelvin probe force microscopyLocal current distributionHere we present a novel solvothermal synthesis approach for the accurate control over the structural features of nickel/reduced graphene oxide (Ni/rGO) nanocomposites for tuneable electrical properties. We discovered that the dynamic chemical structure of GO during reaction, acts as an active template for the controlled nanostructured growth of nickel nanoparticles (Ni NPs). Therefore, the precise control of reaction time offered the possibility to modulate nucleation and coalescence phenomena of Ni NPs, allowing in this way to precisely adjust their size, density and NiO@Ni structure on the final Ni/rGO nanocomposites. The electrophysical properties (work function and conductivity) of different Ni/rGO nanocomposites were determined and found to be directly dependent on the Ni NPs radius and also on the NiO buffer layer width. We confirmed a crucial role of the NiO buffer layer thickness at the Pt-NiO-Ni-NiO-rGO interface changing the conductivity from metallic to those specific to a Schottky contact or to a p-n heterojunction. These new findings reveal a relevant potential for using Ni/rGO nanocomposites as a versatile and promising material for micro-, nano- and optoelectronics as well as for energy storage technologies.Elsevier2020-12-31T00:00:00Z2019-12-31T00:00:00Z2019-12-31info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/27159eng0169-433210.1016/j.apsusc.2019.143781Salimian, MaryamIvanov, Maxim S.Bdikin, IgorPohl, DariusOswald, SteffenKhomchenko, Vladimir A.Paixão, José AntónioRellinghaus, BerndMarques, Paula A. A. P.Gonçalves, Gilinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:52:35Zoai:ria.ua.pt:10773/27159Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:00:00.029439Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
title |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
spellingShingle |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties Salimian, Maryam Nickel/graphene nanocomposites Solvothermal method Electrical properties Kelvin probe force microscopy Local current distribution |
title_short |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
title_full |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
title_fullStr |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
title_full_unstemmed |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
title_sort |
Nanoengineered Nickel/reduced graphene oxide composites: control of interfacial nanostructure for tunable electrophysical properties |
author |
Salimian, Maryam |
author_facet |
Salimian, Maryam Ivanov, Maxim S. Bdikin, Igor Pohl, Darius Oswald, Steffen Khomchenko, Vladimir A. Paixão, José António Rellinghaus, Bernd Marques, Paula A. A. P. Gonçalves, Gil |
author_role |
author |
author2 |
Ivanov, Maxim S. Bdikin, Igor Pohl, Darius Oswald, Steffen Khomchenko, Vladimir A. Paixão, José António Rellinghaus, Bernd Marques, Paula A. A. P. Gonçalves, Gil |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Salimian, Maryam Ivanov, Maxim S. Bdikin, Igor Pohl, Darius Oswald, Steffen Khomchenko, Vladimir A. Paixão, José António Rellinghaus, Bernd Marques, Paula A. A. P. Gonçalves, Gil |
dc.subject.por.fl_str_mv |
Nickel/graphene nanocomposites Solvothermal method Electrical properties Kelvin probe force microscopy Local current distribution |
topic |
Nickel/graphene nanocomposites Solvothermal method Electrical properties Kelvin probe force microscopy Local current distribution |
description |
Here we present a novel solvothermal synthesis approach for the accurate control over the structural features of nickel/reduced graphene oxide (Ni/rGO) nanocomposites for tuneable electrical properties. We discovered that the dynamic chemical structure of GO during reaction, acts as an active template for the controlled nanostructured growth of nickel nanoparticles (Ni NPs). Therefore, the precise control of reaction time offered the possibility to modulate nucleation and coalescence phenomena of Ni NPs, allowing in this way to precisely adjust their size, density and NiO@Ni structure on the final Ni/rGO nanocomposites. The electrophysical properties (work function and conductivity) of different Ni/rGO nanocomposites were determined and found to be directly dependent on the Ni NPs radius and also on the NiO buffer layer width. We confirmed a crucial role of the NiO buffer layer thickness at the Pt-NiO-Ni-NiO-rGO interface changing the conductivity from metallic to those specific to a Schottky contact or to a p-n heterojunction. These new findings reveal a relevant potential for using Ni/rGO nanocomposites as a versatile and promising material for micro-, nano- and optoelectronics as well as for energy storage technologies. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12-31T00:00:00Z 2019-12-31 2020-12-31T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/27159 |
url |
http://hdl.handle.net/10773/27159 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0169-4332 10.1016/j.apsusc.2019.143781 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799137655049420800 |