Neutral polyampholyte in an ionic solution
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/103637 |
Resumo: | The behavior of a neutral polyampholyte (PA) chain with N monomers, in an ionic solution, is analyzed in the framework of the full Debye-Hückel-Bjerrum-Flory (DHBjF) theory. A PA chain, that in addition to the neutral monomers, also contains an equal number of positively and negatively charged monomers, is dissolved in an ionic solution. For high concentrations of salt and at high temperatures, the PA exists in an extended state. As the temperature is decreased, the electrostatic energy becomes more relevant and at a T=Tθ the system collapses into a dilute globular state, or microelectrolyte. This state contains a concentration of salt higher than the surrounding medium. As the temperature is decreased even further, association between the monomers of the polymer and the ions of the salt becomes relevant and there is a crossover from this globular state to a low temperature extended state. For low densities of salt, the system is collapsed for almost all temperatures and exhibits a first-order phase transition to an extended state at an unphysical low temperature. |
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Diehl, AlexandreBarbosa, Marcia Cristina BernardesLevin, Yan2014-09-23T02:12:31Z19961063-651Xhttp://hdl.handle.net/10183/103637000179415The behavior of a neutral polyampholyte (PA) chain with N monomers, in an ionic solution, is analyzed in the framework of the full Debye-Hückel-Bjerrum-Flory (DHBjF) theory. A PA chain, that in addition to the neutral monomers, also contains an equal number of positively and negatively charged monomers, is dissolved in an ionic solution. For high concentrations of salt and at high temperatures, the PA exists in an extended state. As the temperature is decreased, the electrostatic energy becomes more relevant and at a T=Tθ the system collapses into a dilute globular state, or microelectrolyte. This state contains a concentration of salt higher than the surrounding medium. As the temperature is decreased even further, association between the monomers of the polymer and the ions of the salt becomes relevant and there is a crossover from this globular state to a low temperature extended state. For low densities of salt, the system is collapsed for almost all temperatures and exhibits a first-order phase transition to an extended state at an unphysical low temperature.application/pdfengPhysical Review. E, Statistical Physics, Plasmas, Fluids and Related Interdisciplinary Topics. New York. Vol. 54, n. 6 (Dec. 1996), p. 6516-6525Física da matéria condensadaTransformações de faseNeutral polyampholyte in an ionic solutionEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000179415.pdf000179415.pdfTexto completo (inglês)application/pdf178003http://www.lume.ufrgs.br/bitstream/10183/103637/1/000179415.pdf917e93a9ac6446d636315a763c3620b3MD51TEXT000179415.pdf.txt000179415.pdf.txtExtracted Texttext/plain41892http://www.lume.ufrgs.br/bitstream/10183/103637/2/000179415.pdf.txtcc85adadf7ba6e90a22ea56bf78e7ab8MD5210183/1036372024-02-07 06:01:47.742634oai:www.lume.ufrgs.br:10183/103637Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:47Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Neutral polyampholyte in an ionic solution |
title |
Neutral polyampholyte in an ionic solution |
spellingShingle |
Neutral polyampholyte in an ionic solution Diehl, Alexandre Física da matéria condensada Transformações de fase |
title_short |
Neutral polyampholyte in an ionic solution |
title_full |
Neutral polyampholyte in an ionic solution |
title_fullStr |
Neutral polyampholyte in an ionic solution |
title_full_unstemmed |
Neutral polyampholyte in an ionic solution |
title_sort |
Neutral polyampholyte in an ionic solution |
author |
Diehl, Alexandre |
author_facet |
Diehl, Alexandre Barbosa, Marcia Cristina Bernardes Levin, Yan |
author_role |
author |
author2 |
Barbosa, Marcia Cristina Bernardes Levin, Yan |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Diehl, Alexandre Barbosa, Marcia Cristina Bernardes Levin, Yan |
dc.subject.por.fl_str_mv |
Física da matéria condensada Transformações de fase |
topic |
Física da matéria condensada Transformações de fase |
description |
The behavior of a neutral polyampholyte (PA) chain with N monomers, in an ionic solution, is analyzed in the framework of the full Debye-Hückel-Bjerrum-Flory (DHBjF) theory. A PA chain, that in addition to the neutral monomers, also contains an equal number of positively and negatively charged monomers, is dissolved in an ionic solution. For high concentrations of salt and at high temperatures, the PA exists in an extended state. As the temperature is decreased, the electrostatic energy becomes more relevant and at a T=Tθ the system collapses into a dilute globular state, or microelectrolyte. This state contains a concentration of salt higher than the surrounding medium. As the temperature is decreased even further, association between the monomers of the polymer and the ions of the salt becomes relevant and there is a crossover from this globular state to a low temperature extended state. For low densities of salt, the system is collapsed for almost all temperatures and exhibits a first-order phase transition to an extended state at an unphysical low temperature. |
publishDate |
1996 |
dc.date.issued.fl_str_mv |
1996 |
dc.date.accessioned.fl_str_mv |
2014-09-23T02:12:31Z |
dc.type.driver.fl_str_mv |
Estrangeiro 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://hdl.handle.net/10183/103637 |
dc.identifier.issn.pt_BR.fl_str_mv |
1063-651X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000179415 |
identifier_str_mv |
1063-651X 000179415 |
url |
http://hdl.handle.net/10183/103637 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical Review. E, Statistical Physics, Plasmas, Fluids and Related Interdisciplinary Topics. New York. Vol. 54, n. 6 (Dec. 1996), p. 6516-6525 |
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.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
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UFRGS |
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Repositório Institucional da UFRGS |
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Repositório Institucional da UFRGS |
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http://www.lume.ufrgs.br/bitstream/10183/103637/1/000179415.pdf http://www.lume.ufrgs.br/bitstream/10183/103637/2/000179415.pdf.txt |
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