Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules

Detalhes bibliográficos
Autor(a) principal: Sun,Yuping
Data de Publicação: 2014
Outros Autores: Feng,Chao, Liu,Xianguo, Or,Siu Wing, Jin,Chuangui
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200028
Resumo: The microstructure and microwave absorption of carbon-coated Cu nanocapsules have been investigated. Carbon-coated Cu nanocapsules have been synthesized by an arc-discharge method. The paraffin-Cu/C nanocapsules composite shows excellent electromagnetic (EM) absorption properties. An optimal reflection loss (RL) value of - 40.0 dB is reached at 10.52 GHz for a layer 1.9 mm thickness. RL exceeding - 20 dB can be realized in any interval within the 1-18 GHz range by choosing an appropriate thickness of the absorbent layer between 1.1 and 10.0 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The EM-wave absorption properties of nanocapsules materials are illustrated by means of an absorption-tube-map. The carbon-coated Cu nanocapsule is an attractive candidate for EM-wave absorption, which significantly enriches the family of EM-wave nanoabsorbents.
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spelling Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsulesnanocompositescarbonmicrowave absorbersThe microstructure and microwave absorption of carbon-coated Cu nanocapsules have been investigated. Carbon-coated Cu nanocapsules have been synthesized by an arc-discharge method. The paraffin-Cu/C nanocapsules composite shows excellent electromagnetic (EM) absorption properties. An optimal reflection loss (RL) value of - 40.0 dB is reached at 10.52 GHz for a layer 1.9 mm thickness. RL exceeding - 20 dB can be realized in any interval within the 1-18 GHz range by choosing an appropriate thickness of the absorbent layer between 1.1 and 10.0 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The EM-wave absorption properties of nanocapsules materials are illustrated by means of an absorption-tube-map. The carbon-coated Cu nanocapsule is an attractive candidate for EM-wave absorption, which significantly enriches the family of EM-wave nanoabsorbents.ABM, ABC, ABPol2014-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200028Materials Research v.17 n.2 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392014005000005info:eu-repo/semantics/openAccessSun,YupingFeng,ChaoLiu,XianguoOr,Siu WingJin,Chuanguieng2014-05-06T00:00:00Zoai:scielo:S1516-14392014000200028Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2014-05-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
title Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
spellingShingle Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
Sun,Yuping
nanocomposites
carbon
microwave absorbers
title_short Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
title_full Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
title_fullStr Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
title_full_unstemmed Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
title_sort Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules
author Sun,Yuping
author_facet Sun,Yuping
Feng,Chao
Liu,Xianguo
Or,Siu Wing
Jin,Chuangui
author_role author
author2 Feng,Chao
Liu,Xianguo
Or,Siu Wing
Jin,Chuangui
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Sun,Yuping
Feng,Chao
Liu,Xianguo
Or,Siu Wing
Jin,Chuangui
dc.subject.por.fl_str_mv nanocomposites
carbon
microwave absorbers
topic nanocomposites
carbon
microwave absorbers
description The microstructure and microwave absorption of carbon-coated Cu nanocapsules have been investigated. Carbon-coated Cu nanocapsules have been synthesized by an arc-discharge method. The paraffin-Cu/C nanocapsules composite shows excellent electromagnetic (EM) absorption properties. An optimal reflection loss (RL) value of - 40.0 dB is reached at 10.52 GHz for a layer 1.9 mm thickness. RL exceeding - 20 dB can be realized in any interval within the 1-18 GHz range by choosing an appropriate thickness of the absorbent layer between 1.1 and 10.0 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The EM-wave absorption properties of nanocapsules materials are illustrated by means of an absorption-tube-map. The carbon-coated Cu nanocapsule is an attractive candidate for EM-wave absorption, which significantly enriches the family of EM-wave nanoabsorbents.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200028
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200028
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392014005000005
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.17 n.2 2014
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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