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An Electroactive Versatile Matrix for the Construction of Sensors

✍ Scribed by M. Lorena Cortez ; Graciela A. González; Fernando Battaglini

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
225 KB
Volume
23
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

The strong interaction between a positively charged electroactive polyelectrolyte (polyallylamine derivatized with an osmium complex) with an anionic surfactant (sodium dodecyl sulfate) produces a composite material soluble in organic solvents. The organic solution of this material can be applied on electrode surfaces (gold, graphite), generating a very stable modified electrode. The modified electrode presents a very efficient charge propagation through the film and it can be used in further modifications. As an example glucose oxidase is adsorbed; in presence of glucose, this electrode presents catalytic currents with similar values compared to others built by self‐assembling operations.

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This paper presents an algorithm for obtaining the inverse of a tridiagonal matrix numerically. The algorithm does not require diagonal dominance in the matrix and is also computationally efficient.