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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/73038

    Título
    Multibranched gold–mesoporous silica nanoparticles coated with a molecularly imprinted polymer for label-free antibiotic surface-enhanced Raman cattering analysis
    Autor
    Carrasco, Sergio
    Benito Peña, Elena
    Navarro Villoslada, Fernando
    Langer, Judith
    Sanz Ortiz, Marta N.
    Reguera Gómez, JavierAutoridad UVA Orcid
    Liz Marzán, Luis M.
    Moreno Bondi, María C.
    Año del Documento
    2016
    Editorial
    ACS
    Descripción
    Producción Científica
    Documento Fuente
    Chem. Mater. 2016, 28 (21) 7947–7954
    Résumé
    We describe the preparation of multibranched gold−silica−molecularly imprinted polymer (bAu@mSiO2@ MIP) core−shell nanoparticles, with their specific ability to recognize enrofloxacin (ENRO), and their application as label- free nanosensors for the specific detection of the antimicrobial by surface-enhanced Raman scattering. The use of these nanocomposites results in a large enhancement of the Raman scattering of ENRO upon binding of an antibiotic to the selective recognition sites in the MIP. These are in the proximity of the gold core branches that act as intrinsic hot spots providing highly localized and strongly enhanced electromagnetic fields caused by plasmon resonance. The effect of the multibranched morphology of the gold cores (bAu) on the optical spectroscopic response of the bAu@mSiO2@MIP nanosensors is investigated with the aim of improving ENRO detection. The optimized nanostructures allowed us to achieve a detection limit of 1.5 nM for ENRO, which is 2 orders of magnitude lower than those for previously reported Au@MIP nanosensors, additionally providing negligible cross-reactivity toward other potential interfering species.
    ISSN
    0897-4756
    Revisión por pares
    SI
    DOI
    10.1021/acs.chemmater.6b03613
    Patrocinador
    S.C. thanks the Ministry of Education, Culture and Sport for a doctoral grant (FPU). Financial support from MINECO (CTQ2015-69278-C2-1R) and the European Union Seventh Framework Programme (FP7/2007-2013 under Grant Agree- ment 312184, SACS). L.M.L.-M. acknowledges funding from the European Research Council (ERC Advanced Grant Plasmaquo).
    Idioma
    spa
    URI
    https://uvadoc.uva.es/handle/10324/73038
    Tipo de versión
    info:eu-repo/semantics/draft
    Derechos
    openAccess
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    • DEP32 - Artículos de revista [284]
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