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Abstract:

Ellipsometric parameters of layer-by-layer self-assembled osmium complex-derivatized poly(allylamine) and glucose oxidase multilayers, (PAH-Os)n(GOx)n, were measured at different wavelengths during oxidation-reduction cycles. Data were analyzed using an isotropic single layer model for the enzyme films. The changes in film thickness and refractive index during cyclic voltammetry and potential square wave experiments arise from redox modulation causing film swelling due to the exchange of anions and solvent with the bathing electrolyte. These changes correlate well with the fraction of oxidized PAH-Os(III) in the film.

Registro:

Documento: Artículo
Título:Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers
Autor:Forzani, E.S.; Pérez, M.A.; Teijelo, M.L.; Calvo, E.J.
Filiación:INQUIMAE, Departamento de Quimica Inorganica, Facultad de Cie. Exactas y Naturales, Pabellon 2, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina
INFIQC, Departamento de Fisicoquimica, Universidad Nacional de Cordoba, Pabellon Argentina, Ciudad Univ., AR-5000 Cordoba, Argentina
Palabras clave:Cyclic voltammetry; Ellipsometry; Enzymes; Ion exchange; Negative ions; Osmium; Oxidation; Polyelectrolytes; Reduction; Refractive index; Self assembly; Swelling; Glucose oxidase; Isotropic single layer model; Polyallylamine; Redox driven swelling; Redox modulation; Multilayers
Año:2002
Volumen:18
Número:25
Página de inicio:9867
Página de fin:9873
DOI: http://dx.doi.org/10.1021/la0264419
Título revista:Langmuir
Título revista abreviado:Langmuir
ISSN:07437463
CODEN:LANGD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v18_n25_p9867_Forzani

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Citas:

---------- APA ----------
Forzani, E.S., Pérez, M.A., Teijelo, M.L. & Calvo, E.J. (2002) . Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers. Langmuir, 18(25), 9867-9873.
http://dx.doi.org/10.1021/la0264419
---------- CHICAGO ----------
Forzani, E.S., Pérez, M.A., Teijelo, M.L., Calvo, E.J. "Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers" . Langmuir 18, no. 25 (2002) : 9867-9873.
http://dx.doi.org/10.1021/la0264419
---------- MLA ----------
Forzani, E.S., Pérez, M.A., Teijelo, M.L., Calvo, E.J. "Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers" . Langmuir, vol. 18, no. 25, 2002, pp. 9867-9873.
http://dx.doi.org/10.1021/la0264419
---------- VANCOUVER ----------
Forzani, E.S., Pérez, M.A., Teijelo, M.L., Calvo, E.J. Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers. Langmuir. 2002;18(25):9867-9873.
http://dx.doi.org/10.1021/la0264419