Adsorption study of a macro-RAFT agent onto SiO2-coated Gd2O3:Eu3+ nanorods: Requirements and limitations
authors Zou, H; Melro, L; Chaparro, TD; de Souza, IR; Ananias, D; Bourgeat-Lami, E; dos Santos, AM; Barros-Timmons, A
nationality International
journal APPLIED SURFACE SCIENCE
author keywords Adsorption; Macro-RAFT agent; SiO2; Gd2O3:Eu3+; Nanorods
keywords MEDIATED EMULSION POLYMERIZATION; CARBON NANOTUBES; LUMINESCENCE PROPERTIES; EFFICIENT PREPARATION; LATEX-PARTICLES; SILICA; NANOCOMPOSITES; NANOPARTICLES; ENCAPSULATION; GD2O3/EU3+
abstract The use of a macromolecular RAFT (macro-RAFT) agent to encapsulate anisotropic nano-objects via emulsion polymerization is an emerging route to prepare polymer/inorganic colloidal nanocomposites. However, a number of requirements have to be fulfilled. This work aims at highlighting the effects of the preparative procedure and dispersion method on the amount of macro-RAFT agent adsorbed onto SiO2-coated Gd2O3:Eu3+ nanorods. The adsorption of macro-RAFT agent was studied using the depletion method with UV-vis spectrophotometry. Measurements were performed at a fixed concentration of nanorods and varying concentrations of the macro-RAFT agent in aqueous dispersion at room temperature. The adsorption isotherms showed that for the same initial macro-RAFT agent concentration, the highest adsorption capacity of the macro-RAFT agent on nanorods was usually achieved for non-calcined thin SiO2-coated nanorods under mild bath sonication. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0169-4332
isbn 1873-5584
year published 2017
volume 394
beginning page 519
ending page 527
digital object identifier (doi) 10.1016/j.apsusc.2016.10.141
web of science category Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
subject category Chemistry; Materials Science; Physics
unique article identifier WOS:000389152900060
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journal analysis (jcr 2019):
journal impact factor 6.182
5 year journal impact factor 5.141
category normalized journal impact factor percentile 83.386
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