The use of Langmuir-Blodgett films of a perylene derivative and polypyrrole in the detection of trace levels of Cu2+ ions
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Data
2005-01-03
Autores
Antunes, P. A.
Santana, C. M.
Aroca, R. F.
Oliveira, O. N.
Constantino, CJL
Riul, A.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Langmuir films of a tetracarboxylic perylene derivative and polypyrrole display condensed surface pressure isotherms that are shifted when Cu2+ ions are added to the ultrapure water subphase. These films were transferred onto interdigitated gold electrodes leading to Y-type Langmuir-Blodgett (LB) films. The electrodes modified with 5-layer LB films were immersed into a flask with ultrapure water and water containing Cu2+ ions at concentrations ranging from mM to muM. Impedance measurements indicated a distinct electrical response for the two types of films. Although the materials chosen have no specificity for ionic metals, they can be combined for detecting trace levels of Cu2+, which may be exploited in water quality monitoring. (C) 2004 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Langmuir-Blodgett films, BuPTCD, Ppy
Como citar
Synthetic Metals. Lausanne: Elsevier B.V. Sa, v. 148, n. 1, p. 21-24, 2005.