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Upconversion nanoparticles with a strong acid-resistant capping

AutorRecalde, I.; Estébanez, N.; Francés-Soriano, Laura; Liras, Marta ; González-Béjar, María; Pérez-Prieto, Julia
Fecha de publicación2016
EditorRoyal Society of Chemistry (Great Britain)
CitaciónNanoscale 8: 7588-7594 (2016)
ResumenWater-dispersible upconversion nanoparticles (β-NaYF:Yb,Er, UCNP) coated with a thin shell of a biocompatible copolymer comprising 2-hydroxyethylmethacrylate (HEMA) and 2-acrylamido-2-methyl-1-propanesulphonsulphonic acid (AMPS), which we will term COP, have been prepared by multidentate grafting. This capping is remarkably resistant to strong acidic conditions as low as pH 2. The additional functionality of the smart UCNP@COP nanosystem has been proved by its association to a well-known photosensitizer (namely, methylene blue, MB). The green-to-red emission ratio of the UC@COP@MB nanohybrid exhibits excellent linear dependence in the 7 to 2 pH range as a consequence of the release of the dye as the pH decreases.
Versión del editorhttp://dx.doi.org/10.1039/c5nr06653k
URIhttp://hdl.handle.net/10261/133414
DOI10.1039/c5nr06653k
Identificadoresdoi: 10.1039/c5nr06653k
issn: 2040-3364
e-issn: 2040-3372
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