期刊
LANGMUIR
卷 28, 期 7, 页码 3583-3592出版社
AMER CHEMICAL SOC
DOI: 10.1021/la204854r
关键词
-
资金
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICT 34518, PICT 1848, PAE 2004 22711, PICT 2010-457, PICT-PRH 163/08]
- Centro Interdisciplinario de Nanociencia y Nanotecnologia (CINN) [PAE 2006 37063, PRH 2007-74, 74, PME 00038]
- Fundacion Petruzza, Gabbos [DG-017]
- Max-Planck-Gesellschaft (Max Planck Partner Group - MPIP/INIFTA)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 11220100100186]
- Alexander von Humbolt Stiftung
- Laboraterio Nacional de Luz Sincrotron (LNLS) [XRD2-11639/10736, SXS-11642]
- Universidad de Buenos Aires (UBACYT) [20020090100164]
- ANPCyT
- CONICET
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-porosirnetry, 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据