期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 4, 页码 2331-2339出版社
AMER CHEMICAL SOC
DOI: 10.1021/am506622x
关键词
Ag@ZnO nanorods; low-temperature plasma growth; laser treatment; long-life-span SERS
资金
- Junta de Andalucia [TEP8067, FQM-6900, P12-FQM-2265]
- Spanish Ministry of Economy and Competitiveness [CONSOLIDER-CSD 2008-00023, MAT2011-28345-C02-02, MAT2013-40852-R, MAT2013-42900-P, RECUPERA 2020]
- European Union Seventh Framework Programme [312483-ESTEEM2, REGPOT-CT-2011-285895-Al-NANOFUNC]
- European Research Council under the European Union [291522-3DIMAGE]
- Juan de la Cierva program [JCI-2012_13034]
UV 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.
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