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Tognalli, N.G.; Scodeller, P.; Flexer, V.; Szamocki, R.; Ricci, A.; Tagliazucchi, M.; Calvo, E.J.; Fainstein, A. "Redox molecule based SERS sensors" (2009) Physical Chemistry Chemical Physics. 11(34):7412-7423
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Abstract:

We describe a general framework to design nanobiosensors based on a wired enzyme coupled to a redox molecule and integrated with SERS Au core-shell nanoparticles and ordered nanocavities. The response of the proposed sensor is based on the different electronic resonant Raman behavior of the oxidized or reduced electronic states of the molecular wire, and on the surface plasmon amplification induced by the tailored metallic substrate. The nanobiosensors can be interrogated remotely through the resonant Raman scattering intensity recovery or spectral variation of the redox molecule, an Os-complex, when the latter varies its oxidation state. Alternatively, we show through two-color spectro-electrochemistry that Raman scattering is also finely sensitive to oxidation state changes of flavin, a biomimetic system that mimics the active center of many flavoprotein enzymes. We show that multiple sample spectroscopic ellipsometry gives access to the spectral dependence of the optical constants of single redox-molecule layers, and through it to the electronic resonances of the system. All the components for selective molecular recognition and for the generation of an optical amplified signal, are self-contained in the proposed biosensor. As proof of concept a compact SERS sensor responsive to glucose with millimolar concentration in solution is demonstrated. © the Owner Societies.

Registro:

Documento: Artículo
Título:Redox molecule based SERS sensors
Autor:Tognalli, N.G.; Scodeller, P.; Flexer, V.; Szamocki, R.; Ricci, A.; Tagliazucchi, M.; Calvo, E.J.; Fainstein, A.
Filiación:Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, 8400 S. C. de Bariloche, Río Negro, Argentina
INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad UniVersitaria, Pabellón 2, Buenos Aires, 1428, Argentina
Año:2009
Volumen:11
Número:34
Página de inicio:7412
Página de fin:7423
DOI: http://dx.doi.org/10.1039/b905600a
Título revista:Physical Chemistry Chemical Physics
Título revista abreviado:Phys. Chem. Chem. Phys.
ISSN:14639076
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v11_n34_p7412_Tognalli

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Citas:

---------- APA ----------
Tognalli, N.G., Scodeller, P., Flexer, V., Szamocki, R., Ricci, A., Tagliazucchi, M., Calvo, E.J.,..., Fainstein, A. (2009) . Redox molecule based SERS sensors. Physical Chemistry Chemical Physics, 11(34), 7412-7423.
http://dx.doi.org/10.1039/b905600a
---------- CHICAGO ----------
Tognalli, N.G., Scodeller, P., Flexer, V., Szamocki, R., Ricci, A., Tagliazucchi, M., et al. "Redox molecule based SERS sensors" . Physical Chemistry Chemical Physics 11, no. 34 (2009) : 7412-7423.
http://dx.doi.org/10.1039/b905600a
---------- MLA ----------
Tognalli, N.G., Scodeller, P., Flexer, V., Szamocki, R., Ricci, A., Tagliazucchi, M., et al. "Redox molecule based SERS sensors" . Physical Chemistry Chemical Physics, vol. 11, no. 34, 2009, pp. 7412-7423.
http://dx.doi.org/10.1039/b905600a
---------- VANCOUVER ----------
Tognalli, N.G., Scodeller, P., Flexer, V., Szamocki, R., Ricci, A., Tagliazucchi, M., et al. Redox molecule based SERS sensors. Phys. Chem. Chem. Phys. 2009;11(34):7412-7423.
http://dx.doi.org/10.1039/b905600a