Self-assembly of Au nanoparticles on PMMA template as flexible, transparent, and highly active SERS substrates.
Anal Chem
; 86(13): 6262-7, 2014 Jul 01.
Article
en En
| MEDLINE
| ID: mdl-24873535
ABSTRACT
We report a simple and rapid method for fabricating a surface-enhanced Raman scattering (SERS) substrate, which offers good flexibility, excellent optical transparency, and high SERS activity. Specifically, the SERS substrate (AuNPs/PMMA film) was obtained through self-assembly of gold nanoparticles (AuNPs) on newborn poly(methyl methacrylate) (PMMA) template. The UV-vis spectroscopy analysis and scanning electron microscopy observation revealed that the gold nanoparticles were closely assembled on the flexible and transparent PMMA template. The fabricated AuNPs/PMMA film SERS substrate allowed detection of model molecule, malachite green isothiocyanate, at a concentration as low as 0.1 nM, and exhibited good reproducibility in the SERS measurement. The Raman enhancement factor (EF) of the AuNPs/PMMA film was found to be as high as (2.4 ± 0.3) × 10(7). In addition, measure of residual malachite green on fish surface was carried out, and the result indicated that the AuNPs/PMMA film had great potential in the in situ ultrasensitive detection of analyte on irregular objects.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Colorantes de Rosanilina
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Espectrometría Raman
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Isotiocianatos
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Polimetil Metacrilato
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Colorantes
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Nanopartículas del Metal
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Oro
Tipo de estudio:
Evaluation_studies
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Prognostic_studies
Idioma:
En
Revista:
Anal Chem
Año:
2014
Tipo del documento:
Article