Silver nanoparticles stabilized by ramnolipids: Effect of pH
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.colsurfb.2021.111883 http://hdl.handle.net/11449/208736 |
Resumo: | Rhamnolipids are glycolipid biosurfactants that have remarkable physicochemical characteristics, such as the capacity for self-assembly, which makes these biomolecules a promising option for application in nanobiotechnology. Rhamnolipids produced from a low-cost carbon source (glycerol) were used to stabilize silver nanoparticles. Silver nanoparticles (AgNPs) have been the subject of studies due to their physical chemical as well as biological properties, which corroborate their catalytic and antimicrobial activity. We compared nanoparticles obtained with three different pH values during synthesis (5, 7 and 9) in the presence of rhamnolipids. Dynamic light scattering showed that larger particles were formed at pH 5 (78–190 nm) compared to pH 7 (6.5–43 nm) and 9 (5.6–28.1 nm). Moreover, nanoparticle stability (analyzed based on the zeta potential) was enhanced with the increase in pH from 5 to 9 (−29.86 ± 1.04, −37.83 ± 0.90 and −40.33 ± 0.57 mV, respectively). Field emission gun scanning electron microscopy confirmed the round morphology of the silver nanoparticles. The LSPR spectra of AgNP for the pHs studied are conserved. In conclusion, different pH values in the presence of rhamnolipids used in the synthesis of silver nanoparticles directly affect nanoparticle size and stability. |
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Silver nanoparticles stabilized by ramnolipids: Effect of pHBiosurfactantGlycolipidMetallic nanoparticlesMicellesNanomaterialsVesiclesRhamnolipids are glycolipid biosurfactants that have remarkable physicochemical characteristics, such as the capacity for self-assembly, which makes these biomolecules a promising option for application in nanobiotechnology. Rhamnolipids produced from a low-cost carbon source (glycerol) were used to stabilize silver nanoparticles. Silver nanoparticles (AgNPs) have been the subject of studies due to their physical chemical as well as biological properties, which corroborate their catalytic and antimicrobial activity. We compared nanoparticles obtained with three different pH values during synthesis (5, 7 and 9) in the presence of rhamnolipids. Dynamic light scattering showed that larger particles were formed at pH 5 (78–190 nm) compared to pH 7 (6.5–43 nm) and 9 (5.6–28.1 nm). Moreover, nanoparticle stability (analyzed based on the zeta potential) was enhanced with the increase in pH from 5 to 9 (−29.86 ± 1.04, −37.83 ± 0.90 and −40.33 ± 0.57 mV, respectively). Field emission gun scanning electron microscopy confirmed the round morphology of the silver nanoparticles. The LSPR spectra of AgNP for the pHs studied are conserved. In conclusion, different pH values in the presence of rhamnolipids used in the synthesis of silver nanoparticles directly affect nanoparticle size and stability.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)São Paulo State University (Unesp) Institute of Biosciences, Rio ClaroSão Paulo State University (Unesp) Institute for Research in Bioenergy, Rio ClaroSão Paulo State University (Unesp) Institute of Chemistry, AraraquaraFederal University of São Carlos (UFSCar) Lagoa do Sino Campus, BuriSão Paulo State University (Unesp) Institute of Biosciences, Rio ClaroSão Paulo State University (Unesp) Institute for Research in Bioenergy, Rio ClaroSão Paulo State University (Unesp) Institute of Chemistry, AraraquaraUniversidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Salazar-Bryam, Ana Maria [UNESP]Yoshimura, Ingrid [UNESP]Santos, Larissa Provasi [UNESP]Moura, Cinthia Cristine [UNESP]Santos, Caio Carvalho [UNESP]Silva, Vinicius Luiz [UNESP]Lovaglio, Roberta BarrosCosta Marques, Rodrigo Fernando [UNESP]Jafelicci Junior, Miguel [UNESP]Contiero, Jonas [UNESP]2021-06-25T11:18:13Z2021-06-25T11:18:13Z2021-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.colsurfb.2021.111883Colloids and Surfaces B: Biointerfaces, v. 205.1873-43670927-7765http://hdl.handle.net/11449/20873610.1016/j.colsurfb.2021.1118832-s2.0-85107279860Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengColloids and Surfaces B: Biointerfacesinfo:eu-repo/semantics/openAccess2021-10-23T19:02:26Zoai:repositorio.unesp.br:11449/208736Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:02:26Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
title |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
spellingShingle |
Silver nanoparticles stabilized by ramnolipids: Effect of pH Salazar-Bryam, Ana Maria [UNESP] Biosurfactant Glycolipid Metallic nanoparticles Micelles Nanomaterials Vesicles |
title_short |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
title_full |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
title_fullStr |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
title_full_unstemmed |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
title_sort |
Silver nanoparticles stabilized by ramnolipids: Effect of pH |
author |
Salazar-Bryam, Ana Maria [UNESP] |
author_facet |
Salazar-Bryam, Ana Maria [UNESP] Yoshimura, Ingrid [UNESP] Santos, Larissa Provasi [UNESP] Moura, Cinthia Cristine [UNESP] Santos, Caio Carvalho [UNESP] Silva, Vinicius Luiz [UNESP] Lovaglio, Roberta Barros Costa Marques, Rodrigo Fernando [UNESP] Jafelicci Junior, Miguel [UNESP] Contiero, Jonas [UNESP] |
author_role |
author |
author2 |
Yoshimura, Ingrid [UNESP] Santos, Larissa Provasi [UNESP] Moura, Cinthia Cristine [UNESP] Santos, Caio Carvalho [UNESP] Silva, Vinicius Luiz [UNESP] Lovaglio, Roberta Barros Costa Marques, Rodrigo Fernando [UNESP] Jafelicci Junior, Miguel [UNESP] Contiero, Jonas [UNESP] |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) |
dc.contributor.author.fl_str_mv |
Salazar-Bryam, Ana Maria [UNESP] Yoshimura, Ingrid [UNESP] Santos, Larissa Provasi [UNESP] Moura, Cinthia Cristine [UNESP] Santos, Caio Carvalho [UNESP] Silva, Vinicius Luiz [UNESP] Lovaglio, Roberta Barros Costa Marques, Rodrigo Fernando [UNESP] Jafelicci Junior, Miguel [UNESP] Contiero, Jonas [UNESP] |
dc.subject.por.fl_str_mv |
Biosurfactant Glycolipid Metallic nanoparticles Micelles Nanomaterials Vesicles |
topic |
Biosurfactant Glycolipid Metallic nanoparticles Micelles Nanomaterials Vesicles |
description |
Rhamnolipids are glycolipid biosurfactants that have remarkable physicochemical characteristics, such as the capacity for self-assembly, which makes these biomolecules a promising option for application in nanobiotechnology. Rhamnolipids produced from a low-cost carbon source (glycerol) were used to stabilize silver nanoparticles. Silver nanoparticles (AgNPs) have been the subject of studies due to their physical chemical as well as biological properties, which corroborate their catalytic and antimicrobial activity. We compared nanoparticles obtained with three different pH values during synthesis (5, 7 and 9) in the presence of rhamnolipids. Dynamic light scattering showed that larger particles were formed at pH 5 (78–190 nm) compared to pH 7 (6.5–43 nm) and 9 (5.6–28.1 nm). Moreover, nanoparticle stability (analyzed based on the zeta potential) was enhanced with the increase in pH from 5 to 9 (−29.86 ± 1.04, −37.83 ± 0.90 and −40.33 ± 0.57 mV, respectively). Field emission gun scanning electron microscopy confirmed the round morphology of the silver nanoparticles. The LSPR spectra of AgNP for the pHs studied are conserved. In conclusion, different pH values in the presence of rhamnolipids used in the synthesis of silver nanoparticles directly affect nanoparticle size and stability. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T11:18:13Z 2021-06-25T11:18:13Z 2021-09-01 |
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/10.1016/j.colsurfb.2021.111883 Colloids and Surfaces B: Biointerfaces, v. 205. 1873-4367 0927-7765 http://hdl.handle.net/11449/208736 10.1016/j.colsurfb.2021.111883 2-s2.0-85107279860 |
url |
http://dx.doi.org/10.1016/j.colsurfb.2021.111883 http://hdl.handle.net/11449/208736 |
identifier_str_mv |
Colloids and Surfaces B: Biointerfaces, v. 205. 1873-4367 0927-7765 10.1016/j.colsurfb.2021.111883 2-s2.0-85107279860 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Colloids and Surfaces B: Biointerfaces |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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_ |
1797789897159868416 |