resumo
We demonstrate in this research that surface-enhanced resonance Raman scattering combined with Raman imaging can be effectively used for analysis of distinct forms of organic dyes in antimicrobial Ag-loaded textile fibers. The potential of this approach, as a non-destructive characterization method of fabrics, was evaluated with Raman studies performed on the molecular forms of methylene blue (MB), used here as the organic dye model. On the basis of the surface-enhanced Raman scattering spectra of MB monomers and dimers, the Raman imaging of Ag-loaded linen fibers previously treated with MB solution was performed and then used for identification of the adsorbate species in distinct regions of the substrates. A semi-quantitative analysis is then performed by considering the area of the Raman bands ascribed to the MB molecular forms and image analysis applied to Raman images. Copyright (c) 2017 John Wiley & Sons, Ltd.
palavras-chave
MEMBRANE MIMETIC SYSTEMS; AQUEOUS-SOLUTION; SCATTERING; FLUORESCENCE; SPECTROSCOPY; AGGREGATION; DYES; SERS; EQUILIBRIUM; ABSORPTION
categoria
Spectroscopy
autores
Fateixa, S; Wilhelm, M; Jorge, AM; Nogueira, HIS; Trindade, T
nossos autores
Helena Isabel Seguro Nogueira
Professor Auxiliar com Agregação
Manon Wilhelm
Estudante de doutoramento
Sara Fateixa
Investigador Júnior
Tito Trindade
Professor Catedráticoagradecimentos
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by Fundo Europeu de Desenvolvimento Regional (FEDER) under the PT2020 Partnership Agreement. S. Fateixa thanks Fundacao para a Ciencia e Tecnologia (FCT) for the Grant SFRH/BPD/93547/2013.