Title :
Sensors for detecting humic substances and heavy metal complexes in waters
Author :
Firmino, Alessandra ; Borato, C.E. ; Leite, Fabio L. ; Oliveira, Osvaldo N., Jr. ; Silva, Wilson T L ; Mattoso, Luiz H C
Author_Institution :
Pos-Graduacao em Ciencia e Engenharia de Materials, USP, Sao Carlos, Brazil
Abstract :
The interaction between poly(o-ethoxyaniline) (POEA) adsorbed onto solid substrates and humic substances (HS) and Cu2+ ions has been investigated with UV-VIS spectroscopy and atomic force microscopy. Both HS and Cu2+ cause the POEA film to be further doped, and alter the film morphology. This interaction was exploited in a sensor array made of nanostructured films of POEA, sulfonated lignin and HS, which could detect small concentrations of HS and Cu2+ in water.
Keywords :
adsorbed layers; atomic force microscopy; nanostructured materials; polymer films; ultraviolet spectra; visible spectra; Cu2+ ions; UV spectra; adsorbed poly(o-ethoxyaniline) film; atomic force microscopy; heavy metal complexes; humic substances; nanostructured films; sensor array; visible spectra; Atomic force microscopy; Atomic measurements; Chemicals; Electrodes; Force measurement; Force sensors; Optical films; Sensor arrays; Solids; Spectroscopy;
Conference_Titel :
Electrets, 2005. ISE-12. 2005 12th International Symposium on
Print_ISBN :
0-7803-9116-0
DOI :
10.1109/ISE.2005.1612413
