Antunes, P. A.Santana, C. M.Aroca, R. F.Oliveira, O. N.Constantino, CJLRiul, A.2014-05-202014-05-202005-01-03Synthetic Metals. Lausanne: Elsevier B.V. Sa, v. 148, n. 1, p. 21-24, 2005.0379-6779http://hdl.handle.net/11449/31431Langmuir 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.21-24engLangmuir-Blodgett filmsBuPTCDPpyArtigo10.1016/j.synthmet.2004.09.004WOS:000225662200005Acesso restrito