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Abdelsalam, M.; Bartlett, P.N.; Russell, A.E.; Baumberg, J.J.; Calvo, E.J.; Tognalli, N.G.; Fainstein, A. "Quantitative electrochemical SERS of flavin at a structured silver surface" (2008) Langmuir. 24(13):7018-7023
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Abstract:

In situ electrochemical surface enhanced Raman spectra (SERS) for an immobilized monolayer of a flavin analogue (isoalloxazine) at nanostructured silver surfaces are reported. Unique in the present study, the flavin is not directly adsorbed at the Ag surface but is attached through a chemical reaction between cysteamine adsorbed on the Ag surface and methylformylisoalloxazine. Even though the flavin is held away from direct contact with the metal, strong surface enhancements are observed. The nanostructured silver surfaces are produced by electrodeposition through colloidal templates to produce thin (< 1 μm) films containing close-packed hexagonal arrays of uniform 900 nm sphere segment voids. The sphere segment void (SSV) structured silver surfaces are shown to be ideally suited to in situ electrochemical SERS studies at 633 nm, giving stable, reproducible surface enhancements at a range of electrode potentials, and we show that the SER spectra are sensitive to subfemtomole quantities of immobilized flavin. Studies of the SER spectra as a function of the electrode potential show clear evidence for the formation of the flavin semiquinone at the electrode surface at cathodic potentials. © 2008 American Chemical Society.

Registro:

Documento: Artículo
Título:Quantitative electrochemical SERS of flavin at a structured silver surface
Autor:Abdelsalam, M.; Bartlett, P.N.; Russell, A.E.; Baumberg, J.J.; Calvo, E.J.; Tognalli, N.G.; Fainstein, A.
Filiación:School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom
Electrochemistry Group, INQUIMAE, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina
Centro Atómico, Bariloche-Instituto Balseiro, C.N.E.A., 8400 S. C. de Bariloche, Río Negro, Argentina
Palabras clave:Ag(111) surface; Colloidal templates; Cysteamine; Direct contacts; Electrochemical SERS; Electrochemical surfaces; In-situ; Nano-structured; Silver surface; Surface enhancements
Año:2008
Volumen:24
Número:13
Página de inicio:7018
Página de fin:7023
DOI: http://dx.doi.org/10.1021/la800410x
Título revista:Langmuir
Título revista abreviado:Langmuir
ISSN:07437463
CODEN:LANGD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v24_n13_p7018_Abdelsalam

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Citas:

---------- APA ----------
Abdelsalam, M., Bartlett, P.N., Russell, A.E., Baumberg, J.J., Calvo, E.J., Tognalli, N.G. & Fainstein, A. (2008) . Quantitative electrochemical SERS of flavin at a structured silver surface. Langmuir, 24(13), 7018-7023.
http://dx.doi.org/10.1021/la800410x
---------- CHICAGO ----------
Abdelsalam, M., Bartlett, P.N., Russell, A.E., Baumberg, J.J., Calvo, E.J., Tognalli, N.G., et al. "Quantitative electrochemical SERS of flavin at a structured silver surface" . Langmuir 24, no. 13 (2008) : 7018-7023.
http://dx.doi.org/10.1021/la800410x
---------- MLA ----------
Abdelsalam, M., Bartlett, P.N., Russell, A.E., Baumberg, J.J., Calvo, E.J., Tognalli, N.G., et al. "Quantitative electrochemical SERS of flavin at a structured silver surface" . Langmuir, vol. 24, no. 13, 2008, pp. 7018-7023.
http://dx.doi.org/10.1021/la800410x
---------- VANCOUVER ----------
Abdelsalam, M., Bartlett, P.N., Russell, A.E., Baumberg, J.J., Calvo, E.J., Tognalli, N.G., et al. Quantitative electrochemical SERS of flavin at a structured silver surface. Langmuir. 2008;24(13):7018-7023.
http://dx.doi.org/10.1021/la800410x