Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers

Erica S. Forzani; Manuel A. Pérez; Manuel López Teijelo; Ernesto J. Calvo

doi:10.1021/la0264419

Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers

Erica S. Forzani, Manuel A. Pérez, Manuel López Teijelo, Ernesto J. Calvo

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

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.

Original language	English (US)
Pages (from-to)	9867-9873
Number of pages	7
Journal	Langmuir
Volume	18
Issue number	25
DOIs	https://doi.org/10.1021/la0264419
State	Published - Dec 10 2002
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la0264419

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@article{97cbe7609ae3484cb236d2cd03e09b9c,

title = "Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers",

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.",

author = "Forzani, {Erica S.} and P{\'e}rez, {Manuel A.} and Teijelo, {Manuel L{\'o}pez} and Calvo, {Ernesto J.}",

year = "2002",

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doi = "10.1021/la0264419",

language = "English (US)",

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T1 - Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers

AU - Forzani, Erica S.

AU - Pérez, Manuel A.

AU - Teijelo, Manuel López

AU - Calvo, Ernesto J.

PY - 2002/12/10

Y1 - 2002/12/10

N2 - 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.

AB - 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.

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U2 - 10.1021/la0264419

DO - 10.1021/la0264419

M3 - Article

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EP - 9873

JO - Langmuir

JF - Langmuir

IS - 25

ER -

Redox driven swelling of layer-by-layer enzyme-polyelectrolyte multilayers

Abstract

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