Improving Graphene-metal Contacts: Thermal Induced Polishing
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1557/adv.2018.66 http://hdl.handle.net/11449/160164 |
Resumo: | Graphene is a very promising material for nanoelectronics applications due to its unique and remarkable electronic and thermal properties. However, when deposited on metallic electrodes the overall thermal conductivity is significantly decreased. This phenomenon has been attributed to the mismatch between the interfaces and contact thermal resistance. Experimentally, one way to improve the graphene/metal contact is thorough high-temperature annealing, but the detailed mechanisms behind these processes remain unclear. In order to address these questions, we carried out fully atomistic reactive molecular dynamics simulations using the ReaxFF force field to investigate the interactions between multi-layer graphene and metallic electrodes (nickel) under (thermal) annealing. Our results show that the annealing induces an upward-downward movement of the graphene layers, causing a pile-driver-like effect over the metallic surface. This graphene induced movements cause a planarization (thermal polishing-like effect) of the metallic surface, which results in the increase of the effective graphene/metal contact area. This can also explain the experimentally observed improvements of the thermal and electric conductivities. |
id |
UNSP_9a07bb8df1256bd56afd273244948b90 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/160164 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Improving Graphene-metal Contacts: Thermal Induced PolishingGraphene is a very promising material for nanoelectronics applications due to its unique and remarkable electronic and thermal properties. However, when deposited on metallic electrodes the overall thermal conductivity is significantly decreased. This phenomenon has been attributed to the mismatch between the interfaces and contact thermal resistance. Experimentally, one way to improve the graphene/metal contact is thorough high-temperature annealing, but the detailed mechanisms behind these processes remain unclear. In order to address these questions, we carried out fully atomistic reactive molecular dynamics simulations using the ReaxFF force field to investigate the interactions between multi-layer graphene and metallic electrodes (nickel) under (thermal) annealing. Our results show that the annealing induces an upward-downward movement of the graphene layers, causing a pile-driver-like effect over the metallic surface. This graphene induced movements cause a planarization (thermal polishing-like effect) of the metallic surface, which results in the increase of the effective graphene/metal contact area. This can also explain the experimentally observed improvements of the thermal and electric conductivities.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Campinas, Gleb Wataghin Inst Phys, Campinas, SP, BrazilUniv Campinas UNICAMP, CCES, Campinas, SP, BrazilSao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Rio Claro, SP, BrazilFed Univ ABC, Ctr Nat Human Sci, Santo Andre, SP, BrazilState Univ Campinas UNICAMP, Ctr Semicond Components, Campinas, SP, BrazilSao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Rio Claro, SP, BrazilFAPESP: 2013/08293-7FAPESP: 2016/18499-0Cambridge Univ PressUniversidade Estadual de Campinas (UNICAMP)Universidade Estadual Paulista (Unesp)Universidade Federal do ABC (UFABC)Oliveira, Eliezer FernandoBarbosa dos Santos, Ricardo Paupitz [UNESP]Silva Antreto, Pedro Alves daMoshkalev, StanislavGalvao, Douglas Soares2018-11-26T15:47:43Z2018-11-26T15:47:43Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article73-78http://dx.doi.org/10.1557/adv.2018.66Mrs Advances. New York: Cambridge Univ Press, v. 3, n. 1-2, p. 73-78, 2018.2059-8521http://hdl.handle.net/11449/16016410.1557/adv.2018.66WOS:000427715200012Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMrs Advancesinfo:eu-repo/semantics/openAccess2021-10-23T14:40:27Zoai:repositorio.unesp.br:11449/160164Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:01:34.101260Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
title |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
spellingShingle |
Improving Graphene-metal Contacts: Thermal Induced Polishing Oliveira, Eliezer Fernando |
title_short |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
title_full |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
title_fullStr |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
title_full_unstemmed |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
title_sort |
Improving Graphene-metal Contacts: Thermal Induced Polishing |
author |
Oliveira, Eliezer Fernando |
author_facet |
Oliveira, Eliezer Fernando Barbosa dos Santos, Ricardo Paupitz [UNESP] Silva Antreto, Pedro Alves da Moshkalev, Stanislav Galvao, Douglas Soares |
author_role |
author |
author2 |
Barbosa dos Santos, Ricardo Paupitz [UNESP] Silva Antreto, Pedro Alves da Moshkalev, Stanislav Galvao, Douglas Soares |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade Estadual Paulista (Unesp) Universidade Federal do ABC (UFABC) |
dc.contributor.author.fl_str_mv |
Oliveira, Eliezer Fernando Barbosa dos Santos, Ricardo Paupitz [UNESP] Silva Antreto, Pedro Alves da Moshkalev, Stanislav Galvao, Douglas Soares |
description |
Graphene is a very promising material for nanoelectronics applications due to its unique and remarkable electronic and thermal properties. However, when deposited on metallic electrodes the overall thermal conductivity is significantly decreased. This phenomenon has been attributed to the mismatch between the interfaces and contact thermal resistance. Experimentally, one way to improve the graphene/metal contact is thorough high-temperature annealing, but the detailed mechanisms behind these processes remain unclear. In order to address these questions, we carried out fully atomistic reactive molecular dynamics simulations using the ReaxFF force field to investigate the interactions between multi-layer graphene and metallic electrodes (nickel) under (thermal) annealing. Our results show that the annealing induces an upward-downward movement of the graphene layers, causing a pile-driver-like effect over the metallic surface. This graphene induced movements cause a planarization (thermal polishing-like effect) of the metallic surface, which results in the increase of the effective graphene/metal contact area. This can also explain the experimentally observed improvements of the thermal and electric conductivities. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-26T15:47:43Z 2018-11-26T15:47:43Z 2018-01-01 |
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://dx.doi.org/10.1557/adv.2018.66 Mrs Advances. New York: Cambridge Univ Press, v. 3, n. 1-2, p. 73-78, 2018. 2059-8521 http://hdl.handle.net/11449/160164 10.1557/adv.2018.66 WOS:000427715200012 |
url |
http://dx.doi.org/10.1557/adv.2018.66 http://hdl.handle.net/11449/160164 |
identifier_str_mv |
Mrs Advances. New York: Cambridge Univ Press, v. 3, n. 1-2, p. 73-78, 2018. 2059-8521 10.1557/adv.2018.66 WOS:000427715200012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Mrs Advances |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
73-78 |
dc.publisher.none.fl_str_mv |
Cambridge Univ Press |
publisher.none.fl_str_mv |
Cambridge Univ Press |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128306114985984 |