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dc.date.accessioned | 2021-02-26T17:02:55Z | |
dc.date.available | 2021-02-26T17:02:55Z | |
dc.date.issued | 2012 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/113619 | |
dc.description.abstract | Rational construction of interfaces based on multicomponent responsive systems in which molecular transport is mediated by structures of nanoscale dimensions has become a very fertile research area in biomimetic supramolecular chemistry. Herein, we describe the creation of hybrid mesostructured interfaces with reversible gate-like transport properties that can be controlled by chemical inputs, such as protons or calcium ions. This was accomplished by taking advantage of the surface-initiated polymerization of 2-(methacryloyloxy)ethyl phosphate (MEP) monomer units into and onto mesoporous silica thin films. In this way, phosphate-bearing polymer brushes were used as “gatekeepers” located not only on the outer surface of mesoporous thin films but also in the inner environment of the porous scaffold. Pore-confined PMEP brushes respond to the external triggering chemical signals not only by altering their physicochemical properties but also by switching the transport properties of the mesoporous film. The ion-gate response/operation was based on the protonation and/or chelation of phosphate monomer units in which the polymer brush works as an off-on switch in response to the presence of protons or Ca2+ ions. The hybrid meso-architectured interface and their functional features were studied by a combination of experimental techniques including ellipso-porosimetry, cyclic voltammetry, X-ray reflectivity, grazing incidence small-angle X-ray scattering, X-ray photoelectron spectroscopy, and in situ atomic force microscopy. In this context, we believe that the integration of stimuli-responsive polymer brushes into nanoscopic supramolecular architectures would provide new routes toward multifunctional biomimetic nanosystems displaying transport properties similar to those encountered in biological ligand-gated ion channels. | en |
dc.format.extent | 3583-3592 | es |
dc.language | en | es |
dc.subject | Polymer films | es |
dc.subject | Thin films | es |
dc.subject | Ions | es |
dc.subject | Charge transport | es |
dc.subject | Probes | es |
dc.title | Proton and Calcium-Gated Ionic Mesochannels: Phosphate-Bearing Polymer Brushes Hosted in Mesoporous Thin Films As Biomimetic Interfacial Architectures | en |
dc.type | Articulo | es |
sedici.identifier.other | https://doi.org/10.1021/la204854r | es |
sedici.identifier.issn | 1520-5827 | es |
sedici.creator.person | Brunsen, Annette | es |
sedici.creator.person | Díaz, Carolina | es |
sedici.creator.person | Pietrasanta, Lía I. | es |
sedici.creator.person | Yameen, Basit | es |
sedici.creator.person | Ceolín, Marcelo Raúl | es |
sedici.creator.person | Soler Illia, Galo J. A. A. | es |
sedici.creator.person | Azzaroni, Omar | es |
sedici.subject.materias | Química | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas | es |
mods.originInfo.place | Consejo Nacional de Investigaciones Científicas y Técnicas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Langmuir | es |
sedici.relation.journalVolumeAndIssue | vol. 28 | es |