Low cost selective sensor for carbonyl compounds in air based on a novel conductive poly(p-xylylene) derivative

Autor(es)

Li, Rosamaria W. C. ; Carvalho, Lilian R. F. ; Ventura, Leonardo ; Gruber, Jonas

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 29, n. 2, p. 4-pg., 2009-03-01.

Resumo

A novel poly(p-xylylene), PPX, derivative bearing phenyl side groups was electrochemically synthesized in 85% yield. The polymer, poly(2-phenyl-p-xylylene) (PPPX), presented a major fraction (88%) soluble in common organic solvents. It showed to be thermally resistant up to 140 degrees C. UV-VIS analysis revealed an Egap of similar to 3.0 eV. Gas sensors made from thin films of CSA doped PPPX deposited on interdigitated electrodes exhibited significant changes in electrical conductance upon exposure to five carbonyl compounds: acetaldehyde, propionaldehyde. benzaldehyde, acetone and butanone. Three-dimensional plots of relative response vs. time of half-response vs. time of half-recovery showed good discrimination between the five carbonyl Compounds tested. (C) 2008 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/51701-5 - Desenvolviemtno de sensores para avaliacao de poluentes toxicos presentes no ar de ambientes internos.
• Beneficiário: Rosamaria Wu Chia Li
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 06/59464-2 - Desenvolvimento de sensores para avaliação de poluentes tóxicos presentes no ar de ambientes internos
• Beneficiário: Rosamaria Wu Chia Li
• Modalidade de apoio: Auxílio à Pesquisa - Programa Primeiros Projetos