Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles

In this work, amorphous and crystalline TiO2 films were synthesized by the sol–gel process at room temperature. The TiO2 films were doped with gold nanoparticles. The films were spin-coated on glass wafers. The crystalline samples were annealed at 100°C for 30 minutes and sintered at 520°C for 2 h....

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Detalhes bibliográficos
Autores: Valverde Aguilar, Guadalupe, García Macedo, Jorge, Rentería Tapia, Victor, Aguilar Franco, Manuel
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2011
País:México
Recursos:Instituto Politécnico Nacional
Repositório:Repositorio Digital del IPN
OAI Identifier:oai:www.repositoriodigital.ipn.mx:123456789/10680
Acesso em linha:http://hdl.handle.net/123456789/162
http://www.repositoriodigital.ipn.mx/handle/123456789/10680
Access Level:Acceso aberto
Palavra-chave:Gold nanoparticles
Gans theory
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spelling Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticlesValverde Aguilar, GuadalupeGarcía Macedo, JorgeRentería Tapia, VictorAguilar Franco, ManuelGold nanoparticlesGans theoryIn this work, amorphous and crystalline TiO2 films were synthesized by the sol–gel process at room temperature. The TiO2 films were doped with gold nanoparticles. The films were spin-coated on glass wafers. The crystalline samples were annealed at 100°C for 30 minutes and sintered at 520°C for 2 h. All films were characterized using X-ray diffraction, transmission electronic microscopy and UV-Vis absorption spectroscopy. Two crystalline phases, anatase and rutile, were formed in the matrix TiO2 and TiO2/Au. An absorption peak was located at 570 nm (amorphous) and 645 nm (anatase). Photoconductivity studies were performed on these films. The experimental data were fitted with straight lines at darkness and under illumination at 515 nm and 645 nm. This indicates an ohmic behavior. Crystalline TiO2/Au films are more photoconductive than the amorphous ones.Applied Physics A: Materials Science and Processing2012-03-16T19:39:56Z2012-03-16T19:39:56Z20112013-01-16T09:02:11Z2013-01-16T09:02:11Z2013-01-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/123456789/162http://www.repositoriodigital.ipn.mx/handle/123456789/10680reponame:Repositorio Digital del IPNinstname:Instituto Politécnico Nacionalinstacron:IPNeninfo:eu-repo/semantics/openAccessoai:www.repositoriodigital.ipn.mx:123456789/106802026-02-18T16:40:35Z
dc.title.none.fl_str_mv Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
title Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
spellingShingle Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
Valverde Aguilar, Guadalupe
Gold nanoparticles
Gans theory
title_short Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
title_full Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
title_fullStr Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
title_full_unstemmed Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
title_sort Photoconductivity studies on amorphous and crystalline TiO2 films doped with gold nanoparticles
dc.creator.none.fl_str_mv Valverde Aguilar, Guadalupe
García Macedo, Jorge
Rentería Tapia, Victor
Aguilar Franco, Manuel
author Valverde Aguilar, Guadalupe
author_facet Valverde Aguilar, Guadalupe
García Macedo, Jorge
Rentería Tapia, Victor
Aguilar Franco, Manuel
author_role author
author2 García Macedo, Jorge
Rentería Tapia, Victor
Aguilar Franco, Manuel
author2_role author
author
author
dc.subject.none.fl_str_mv Gold nanoparticles
Gans theory
topic Gold nanoparticles
Gans theory
description In this work, amorphous and crystalline TiO2 films were synthesized by the sol–gel process at room temperature. The TiO2 films were doped with gold nanoparticles. The films were spin-coated on glass wafers. The crystalline samples were annealed at 100°C for 30 minutes and sintered at 520°C for 2 h. All films were characterized using X-ray diffraction, transmission electronic microscopy and UV-Vis absorption spectroscopy. Two crystalline phases, anatase and rutile, were formed in the matrix TiO2 and TiO2/Au. An absorption peak was located at 570 nm (amorphous) and 645 nm (anatase). Photoconductivity studies were performed on these films. The experimental data were fitted with straight lines at darkness and under illumination at 515 nm and 645 nm. This indicates an ohmic behavior. Crystalline TiO2/Au films are more photoconductive than the amorphous ones.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012-03-16T19:39:56Z
2012-03-16T19:39:56Z
2013-01-16T09:02:11Z
2013-01-16T09:02:11Z
2013-01-16
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/123456789/162
http://www.repositoriodigital.ipn.mx/handle/123456789/10680
url http://hdl.handle.net/123456789/162
http://www.repositoriodigital.ipn.mx/handle/123456789/10680
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Applied Physics A: Materials Science and Processing
publisher.none.fl_str_mv Applied Physics A: Materials Science and Processing
dc.source.none.fl_str_mv reponame:Repositorio Digital del IPN
instname:Instituto Politécnico Nacional
instacron:IPN
instname_str Instituto Politécnico Nacional
instacron_str IPN
institution IPN
reponame_str Repositorio Digital del IPN
collection Repositorio Digital del IPN
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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