Surface phonons modes: a tool to determine the quantum dot morphology

Detalhes bibliográficos
Autor(a) principal: Alcalde,Augusto M.
Data de Publicação: 2006
Outros Autores: Ribeiro,Alessandra A., Dantas,Noélio O., Mendes Jr.,Djalma R., Marques,Gilmar E., Trallero-Giner,Carlos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physics
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600009
Resumo: We report here theoretical and experimental studies on the spatial confinement of phonons in ternary CdSxSe1-x nanocrystals embedded in a glass matrix formed by the composites SiO2-Na2CO3-B2O3-Al2O3 doped with CdO, S and Se. We determined the morphologic characteristics of the nanocrystals by analyzing the dependence of surface phonon modes on the geometrical parameters. The calculated frequencies are compared with values from Raman spectra of CdSxSe1-x nanocrystals grown under different thermal treatments. A good correlation between experimental and calculated CdS-like and CdSe-like surface optical modes is observed. Raman selection rules and their connection with the nature of the surface optical phonons is discussed.
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spelling Surface phonons modes: a tool to determine the quantum dot morphologyQuantum dotsRaman scatteringWe report here theoretical and experimental studies on the spatial confinement of phonons in ternary CdSxSe1-x nanocrystals embedded in a glass matrix formed by the composites SiO2-Na2CO3-B2O3-Al2O3 doped with CdO, S and Se. We determined the morphologic characteristics of the nanocrystals by analyzing the dependence of surface phonon modes on the geometrical parameters. The calculated frequencies are compared with values from Raman spectra of CdSxSe1-x nanocrystals grown under different thermal treatments. A good correlation between experimental and calculated CdS-like and CdSe-like surface optical modes is observed. Raman selection rules and their connection with the nature of the surface optical phonons is discussed.Sociedade Brasileira de Física2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600009Brazilian Journal of Physics v.36 n.3b 2006reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332006000600009info:eu-repo/semantics/openAccessAlcalde,Augusto M.Ribeiro,Alessandra A.Dantas,Noélio O.Mendes Jr.,Djalma R.Marques,Gilmar E.Trallero-Giner,Carloseng2006-11-29T00:00:00Zoai:scielo:S0103-97332006000600009Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2006-11-29T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv Surface phonons modes: a tool to determine the quantum dot morphology
title Surface phonons modes: a tool to determine the quantum dot morphology
spellingShingle Surface phonons modes: a tool to determine the quantum dot morphology
Alcalde,Augusto M.
Quantum dots
Raman scattering
title_short Surface phonons modes: a tool to determine the quantum dot morphology
title_full Surface phonons modes: a tool to determine the quantum dot morphology
title_fullStr Surface phonons modes: a tool to determine the quantum dot morphology
title_full_unstemmed Surface phonons modes: a tool to determine the quantum dot morphology
title_sort Surface phonons modes: a tool to determine the quantum dot morphology
author Alcalde,Augusto M.
author_facet Alcalde,Augusto M.
Ribeiro,Alessandra A.
Dantas,Noélio O.
Mendes Jr.,Djalma R.
Marques,Gilmar E.
Trallero-Giner,Carlos
author_role author
author2 Ribeiro,Alessandra A.
Dantas,Noélio O.
Mendes Jr.,Djalma R.
Marques,Gilmar E.
Trallero-Giner,Carlos
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Alcalde,Augusto M.
Ribeiro,Alessandra A.
Dantas,Noélio O.
Mendes Jr.,Djalma R.
Marques,Gilmar E.
Trallero-Giner,Carlos
dc.subject.por.fl_str_mv Quantum dots
Raman scattering
topic Quantum dots
Raman scattering
description We report here theoretical and experimental studies on the spatial confinement of phonons in ternary CdSxSe1-x nanocrystals embedded in a glass matrix formed by the composites SiO2-Na2CO3-B2O3-Al2O3 doped with CdO, S and Se. We determined the morphologic characteristics of the nanocrystals by analyzing the dependence of surface phonon modes on the geometrical parameters. The calculated frequencies are compared with values from Raman spectra of CdSxSe1-x nanocrystals grown under different thermal treatments. A good correlation between experimental and calculated CdS-like and CdSe-like surface optical modes is observed. Raman selection rules and their connection with the nature of the surface optical phonons is discussed.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
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=S0103-97332006000600009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-97332006000600009
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 Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Brazilian Journal of Physics v.36 n.3b 2006
reponame:Brazilian Journal of Physics
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
instacron_str SBF
institution SBF
reponame_str Brazilian Journal of Physics
collection Brazilian Journal of Physics
repository.name.fl_str_mv Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br
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