dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade Estadual de Campinas (UNICAMP) | |
dc.date.accessioned | 2014-05-27T11:28:37Z | |
dc.date.available | 2014-05-27T11:28:37Z | |
dc.date.created | 2014-05-27T11:28:37Z | |
dc.date.issued | 2013-03-01 | |
dc.identifier | International Journal of Electrochemical Science, v. 8, n. 3, p. 4150-4159, 2013. | |
dc.identifier | 1452-3981 | |
dc.identifier | http://hdl.handle.net/11449/74784 | |
dc.identifier | 2-s2.0-84875079906 | |
dc.identifier | 2-s2.0-84875079906.pdf | |
dc.identifier | 7781282422851911 | |
dc.description.abstract | The electrochemical behavior of polystyrene modified with gold nanoparticle (Au NPs) was investigated in terms of pH-responsive polymer brush. A pH-responsive of modified polymer brush from tethered polystyrene was prepared and used for selective gating transport of anions andcations across the thin-film. An ITO-coated glass electrode was used as substrate and applied to study the switchable permeability of the polymer brush triggered by changes in pH of the aqueous environment. The pH-sensitive behavior of the polymer brush interface has been demonstrated by means of cyclic voltammetry (CV) and Localized Surface Plasmon Resonance (LSPR). CV experiments showed at ph values of 4 and 8 induces swelling and shrinking of the grafted polymer brushes, respectively, and this behavior is fast and reversible. LSPR measurements showed a blue shift of 33 nm in the surface resonance band changes by local pH. The paper brings an easy methodology to fabrication a variety of nanosensors based on the polymer brushes-nanoparticle assemblies. © 2013 by ESG. | |
dc.language | eng | |
dc.relation | International Journal of Electrochemical Science | |
dc.relation | 1.369 | |
dc.relation | 0,366 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Gold nanoparticle | |
dc.subject | Local pH change | |
dc.subject | Polymer brushes | |
dc.subject | Stimuli-responsive materials | |
dc.title | Electrochemical studies based on local interfacial ph changes of gold nanoparticles immobilized on polystyrene brushes | |
dc.type | Artículos de revistas | |