Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1140/epje/i2017-11525-5 http://hdl.handle.net/11449/174381 |
Resumo: | Abstract.: Polyampholytes are polymers that have positive and negative monomers along their chain. The adsorption of polyampholytes on charged surfaces has been the subject of a large number of theoretical, computational and experimental studies due to its importance in a variety of bio and nanothechnological systems. However, computational studies focusing on interaction between polyampholytes and cylindrical charged surfaces are rather scarce. This study, therefore, aims to investigate the conformational properties of block-polyampholytes in the presence of a negatively charged cylinder by means of Metropolis Monte Carlo simulations. Adopting a simplified model in which the electrolyte solution is treated at the Debye-Hückel level, the effects of the ionic strength, the linear charge density of the cylinder and the block length on monomers distributions have been investigated. It was found that increasing the salt concentration promotes a transition from a conformation characterized by large loops to a necklace-like conformation parallel to the surface. It was also shown that, at low cylinder charge density, the increase in salt concentration and the length of the blocks lead to a change in the orientation of the adsorbed chain. Graphical abstract: [Figure not available: see fulltext.] |
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Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfacesSoft Matter: Polymers and PolyelectrolytesAbstract.: Polyampholytes are polymers that have positive and negative monomers along their chain. The adsorption of polyampholytes on charged surfaces has been the subject of a large number of theoretical, computational and experimental studies due to its importance in a variety of bio and nanothechnological systems. However, computational studies focusing on interaction between polyampholytes and cylindrical charged surfaces are rather scarce. This study, therefore, aims to investigate the conformational properties of block-polyampholytes in the presence of a negatively charged cylinder by means of Metropolis Monte Carlo simulations. Adopting a simplified model in which the electrolyte solution is treated at the Debye-Hückel level, the effects of the ionic strength, the linear charge density of the cylinder and the block length on monomers distributions have been investigated. It was found that increasing the salt concentration promotes a transition from a conformation characterized by large loops to a necklace-like conformation parallel to the surface. It was also shown that, at low cylinder charge density, the increase in salt concentration and the length of the blocks lead to a change in the orientation of the adsorbed chain. Graphical abstract: [Figure not available: see fulltext.]Departamento de Física Instituto de Biociências Letras e Ciências Exatas Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Cristovão Colombo 2265, Jd. NazarethDepartamento de Física Instituto de Biociências Letras e Ciências Exatas Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Rua Cristovão Colombo 2265, Jd. NazarethUniversidade Estadual Paulista (Unesp)Caetano, Daniel L. Z. [UNESP]de Carvalho, Sidney J. [UNESP]2018-12-11T17:10:51Z2018-12-11T17:10:51Z2017-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1140/epje/i2017-11525-5European Physical Journal E, v. 40, n. 3, 2017.1292-895X1292-8941http://hdl.handle.net/11449/17438110.1140/epje/i2017-11525-52-s2.0-850161627402-s2.0-85016162740.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEuropean Physical Journal E0,489info:eu-repo/semantics/openAccess2023-10-25T06:07:26Zoai:repositorio.unesp.br:11449/174381Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:53:26.493897Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
title |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
spellingShingle |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces Caetano, Daniel L. Z. [UNESP] Soft Matter: Polymers and Polyelectrolytes |
title_short |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
title_full |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
title_fullStr |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
title_full_unstemmed |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
title_sort |
Conformational properties of block-polyampholytes adsorbed on charged cylindrical surfaces |
author |
Caetano, Daniel L. Z. [UNESP] |
author_facet |
Caetano, Daniel L. Z. [UNESP] de Carvalho, Sidney J. [UNESP] |
author_role |
author |
author2 |
de Carvalho, Sidney J. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Caetano, Daniel L. Z. [UNESP] de Carvalho, Sidney J. [UNESP] |
dc.subject.por.fl_str_mv |
Soft Matter: Polymers and Polyelectrolytes |
topic |
Soft Matter: Polymers and Polyelectrolytes |
description |
Abstract.: Polyampholytes are polymers that have positive and negative monomers along their chain. The adsorption of polyampholytes on charged surfaces has been the subject of a large number of theoretical, computational and experimental studies due to its importance in a variety of bio and nanothechnological systems. However, computational studies focusing on interaction between polyampholytes and cylindrical charged surfaces are rather scarce. This study, therefore, aims to investigate the conformational properties of block-polyampholytes in the presence of a negatively charged cylinder by means of Metropolis Monte Carlo simulations. Adopting a simplified model in which the electrolyte solution is treated at the Debye-Hückel level, the effects of the ionic strength, the linear charge density of the cylinder and the block length on monomers distributions have been investigated. It was found that increasing the salt concentration promotes a transition from a conformation characterized by large loops to a necklace-like conformation parallel to the surface. It was also shown that, at low cylinder charge density, the increase in salt concentration and the length of the blocks lead to a change in the orientation of the adsorbed chain. Graphical abstract: [Figure not available: see fulltext.] |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-03-01 2018-12-11T17:10:51Z 2018-12-11T17:10:51Z |
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/10.1140/epje/i2017-11525-5 European Physical Journal E, v. 40, n. 3, 2017. 1292-895X 1292-8941 http://hdl.handle.net/11449/174381 10.1140/epje/i2017-11525-5 2-s2.0-85016162740 2-s2.0-85016162740.pdf |
url |
http://dx.doi.org/10.1140/epje/i2017-11525-5 http://hdl.handle.net/11449/174381 |
identifier_str_mv |
European Physical Journal E, v. 40, n. 3, 2017. 1292-895X 1292-8941 10.1140/epje/i2017-11525-5 2-s2.0-85016162740 2-s2.0-85016162740.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
European Physical Journal E 0,489 |
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 |
Scopus 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_ |
1808128579381231616 |