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Laser treatment of Ag@ZnO nanorods as long-life-span SERS surfaces

AutorMacías-Montero, M. ; Peláez, Ramón J. ; Rico, Víctor J. ; Saghi, Zineb; Midgley, Paul A.; Afonso, Carmen N. ; González-Elipe, Agustín R. ; Borrás, Ana
Palabras claveAg@ZnO nanorods
Laser treatment
Long-life-span SERS
Low-temeperature plasma growth
Fecha de publicación2015
EditorAmerican Chemical Society
CitaciónACS Applied Materials and Interfaces 7(4): 2331-2339 (2015)
ResumenUV nanosecond laser pulses have been used to produce a unique surface nanostructuration of Ag@ZnO supported nanorods (NRs). The NRs were fabricated by plasma enhanced chemical vapor deposition (PECVD) at low temperature applying a silver layer as promoter. The irradiation of these structures with single nanosecond pulses of an ArF laser produces the melting and reshaping of the end of the NRs that aggregate in the form of bundles terminated by melted ZnO spherical particles. Well-defined silver nanoparticles (NPs), formed by phase separation at the surface of these melted ZnO particles, give rise to a broad plasmonic response consistent with their anisotropic shape. Surface enhanced Raman scattering (SERS) in the as-prepared Ag@ZnO NRs arrays was proved by using a Rhodamine 6G (Rh6G) chromophore as standard analyte. The surface modifications induced by laser treatment improve the stability of this system as SERS substrate while preserving its activity.
Versión del editorhttp://dx.doi.org/10.1021/am506622x
URIhttp://hdl.handle.net/10261/111591
DOI10.1021/am506622x
ISSN1944-8244
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