Phototunable response in caged polymer brushes

Autores
Cui, Jiaxi; Nguyen, Thi-Huong; Ceolin, Marcelo Raul; Berger, Rü diger; Azzaroni, Omar; Del Campo, A.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A light-responsive brush was obtained by surface-initiated ATRP of a methacrylate monomer containing ionizable −COOH side groups caged with the photoremovable group 4,5-dimethoxy-2-nitrobenzyl (NVOC). In the caged form, the polymer brush (PNVOCMA) is neutral and hydrophobic due to the presence of the aromatic chromophore. Upon irradiation the NVOC group is removed and a polyanion (polymethacrylic acid, PMAA) chain is generated. The charged brush can swell and collapse depending on the pH and the exposure dose (i.e., uncaging degree). The behavior and properties of the brush layer for different photoconversion degrees were studied. On the basis of quartz crystal microbalance measurements, a threshold of 50% uncaging was identified in order to achieve significant swelling and pH response of the brush. Between 50 and 80% the photoconversion the response of the brush could be light-modulated. For photoconversions >80% only small changes in the response were detectable. X-ray reflectivity (XRR) and scanning force microscopy allowed us to measure thickness, roughness and swelling of the brushes at intermediate photoconversions. Combined XRR and grazing-incidence small-angle scattering experiments evidenced a change in the internal structure of the brush upon exposure and indicated the occurrence of domain segregation as a consequence of the coexistence of hydrophobic and charged groups in the brush structure.
Fil: Cui, Jiaxi. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Nguyen, Thi-Huong. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Ceolin, Marcelo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Berger, Rü diger. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Azzaroni, Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Del Campo, A.. Max Planck Institut Fuer Polymer Forschung; Alemania
Materia
Química Macromolecular
Polymer Brushes
Polymer Thin Films
Materiales Fotoactivos
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/84298
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/84298
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Phototunable response in caged polymer brushesCui, JiaxiNguyen, Thi-HuongCeolin, Marcelo RaulBerger, Rü digerAzzaroni, OmarDel Campo, A.Química MacromolecularPolymer BrushesPolymer Thin FilmsMateriales Fotoactivoshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A light-responsive brush was obtained by surface-initiated ATRP of a methacrylate monomer containing ionizable −COOH side groups caged with the photoremovable group 4,5-dimethoxy-2-nitrobenzyl (NVOC). In the caged form, the polymer brush (PNVOCMA) is neutral and hydrophobic due to the presence of the aromatic chromophore. Upon irradiation the NVOC group is removed and a polyanion (polymethacrylic acid, PMAA) chain is generated. The charged brush can swell and collapse depending on the pH and the exposure dose (i.e., uncaging degree). The behavior and properties of the brush layer for different photoconversion degrees were studied. On the basis of quartz crystal microbalance measurements, a threshold of 50% uncaging was identified in order to achieve significant swelling and pH response of the brush. Between 50 and 80% the photoconversion the response of the brush could be light-modulated. For photoconversions >80% only small changes in the response were detectable. X-ray reflectivity (XRR) and scanning force microscopy allowed us to measure thickness, roughness and swelling of the brushes at intermediate photoconversions. Combined XRR and grazing-incidence small-angle scattering experiments evidenced a change in the internal structure of the brush upon exposure and indicated the occurrence of domain segregation as a consequence of the coexistence of hydrophobic and charged groups in the brush structure.Fil: Cui, Jiaxi. Max Planck Institut Fuer Polymer Forschung; AlemaniaFil: Nguyen, Thi-Huong. Max Planck Institut Fuer Polymer Forschung; AlemaniaFil: Ceolin, Marcelo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Berger, Rü diger. Max Planck Institut Fuer Polymer Forschung; AlemaniaFil: Azzaroni, Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Del Campo, A.. Max Planck Institut Fuer Polymer Forschung; AlemaniaAmerican Chemical Society2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/84298Cui, Jiaxi; Nguyen, Thi-Huong; Ceolin, Marcelo Raul; Berger, Rü diger; Azzaroni, Omar; et al.; Phototunable response in caged polymer brushes; American Chemical Society; Macromolecules; 45; 3-2012; 3213-32200024-9297CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ma300274binfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/ma300274binfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T10:41:07Zoai:ri.conicet.gov.ar:11336/84298instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-17 10:41:08.054CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phototunable response in caged polymer brushes
title Phototunable response in caged polymer brushes
spellingShingle Phototunable response in caged polymer brushes
Cui, Jiaxi
Química Macromolecular
Polymer Brushes
Polymer Thin Films
Materiales Fotoactivos
title_short Phototunable response in caged polymer brushes
title_full Phototunable response in caged polymer brushes
title_fullStr Phototunable response in caged polymer brushes
title_full_unstemmed Phototunable response in caged polymer brushes
title_sort Phototunable response in caged polymer brushes
dc.creator.none.fl_str_mv Cui, Jiaxi
Nguyen, Thi-Huong
Ceolin, Marcelo Raul
Berger, Rü diger
Azzaroni, Omar
Del Campo, A.
author Cui, Jiaxi
author_facet Cui, Jiaxi
Nguyen, Thi-Huong
Ceolin, Marcelo Raul
Berger, Rü diger
Azzaroni, Omar
Del Campo, A.
author_role author
author2 Nguyen, Thi-Huong
Ceolin, Marcelo Raul
Berger, Rü diger
Azzaroni, Omar
Del Campo, A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Química Macromolecular
Polymer Brushes
Polymer Thin Films
Materiales Fotoactivos
topic Química Macromolecular
Polymer Brushes
Polymer Thin Films
Materiales Fotoactivos
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A light-responsive brush was obtained by surface-initiated ATRP of a methacrylate monomer containing ionizable −COOH side groups caged with the photoremovable group 4,5-dimethoxy-2-nitrobenzyl (NVOC). In the caged form, the polymer brush (PNVOCMA) is neutral and hydrophobic due to the presence of the aromatic chromophore. Upon irradiation the NVOC group is removed and a polyanion (polymethacrylic acid, PMAA) chain is generated. The charged brush can swell and collapse depending on the pH and the exposure dose (i.e., uncaging degree). The behavior and properties of the brush layer for different photoconversion degrees were studied. On the basis of quartz crystal microbalance measurements, a threshold of 50% uncaging was identified in order to achieve significant swelling and pH response of the brush. Between 50 and 80% the photoconversion the response of the brush could be light-modulated. For photoconversions >80% only small changes in the response were detectable. X-ray reflectivity (XRR) and scanning force microscopy allowed us to measure thickness, roughness and swelling of the brushes at intermediate photoconversions. Combined XRR and grazing-incidence small-angle scattering experiments evidenced a change in the internal structure of the brush upon exposure and indicated the occurrence of domain segregation as a consequence of the coexistence of hydrophobic and charged groups in the brush structure.
Fil: Cui, Jiaxi. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Nguyen, Thi-Huong. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Ceolin, Marcelo Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Berger, Rü diger. Max Planck Institut Fuer Polymer Forschung; Alemania
Fil: Azzaroni, Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Del Campo, A.. Max Planck Institut Fuer Polymer Forschung; Alemania
description A light-responsive brush was obtained by surface-initiated ATRP of a methacrylate monomer containing ionizable −COOH side groups caged with the photoremovable group 4,5-dimethoxy-2-nitrobenzyl (NVOC). In the caged form, the polymer brush (PNVOCMA) is neutral and hydrophobic due to the presence of the aromatic chromophore. Upon irradiation the NVOC group is removed and a polyanion (polymethacrylic acid, PMAA) chain is generated. The charged brush can swell and collapse depending on the pH and the exposure dose (i.e., uncaging degree). The behavior and properties of the brush layer for different photoconversion degrees were studied. On the basis of quartz crystal microbalance measurements, a threshold of 50% uncaging was identified in order to achieve significant swelling and pH response of the brush. Between 50 and 80% the photoconversion the response of the brush could be light-modulated. For photoconversions >80% only small changes in the response were detectable. X-ray reflectivity (XRR) and scanning force microscopy allowed us to measure thickness, roughness and swelling of the brushes at intermediate photoconversions. Combined XRR and grazing-incidence small-angle scattering experiments evidenced a change in the internal structure of the brush upon exposure and indicated the occurrence of domain segregation as a consequence of the coexistence of hydrophobic and charged groups in the brush structure.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/84298
Cui, Jiaxi; Nguyen, Thi-Huong; Ceolin, Marcelo Raul; Berger, Rü diger; Azzaroni, Omar; et al.; Phototunable response in caged polymer brushes; American Chemical Society; Macromolecules; 45; 3-2012; 3213-3220
0024-9297
CONICET Digital
CONICET
url http://hdl.handle.net/11336/84298
identifier_str_mv Cui, Jiaxi; Nguyen, Thi-Huong; Ceolin, Marcelo Raul; Berger, Rü diger; Azzaroni, Omar; et al.; Phototunable response in caged polymer brushes; American Chemical Society; Macromolecules; 45; 3-2012; 3213-3220
0024-9297
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ma300274b
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/ma300274b
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.001348

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