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Conducting Plasma Polymerized Polypyrrole Thin Films as Carbon Dioxide Gas Sensors
Author(s) -
Yagüe Jose Luis,
Borrós Salvador
Publication year - 2012
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201100169
Subject(s) - polypyrrole , plasma enhanced chemical vapor deposition , materials science , thin film , doping , chemical vapor deposition , carbon film , conductive polymer , polymerization , polymer , plasma , plasma polymerization , conductivity , analyte , carbon dioxide , chemical engineering , analytical chemistry (journal) , nanotechnology , optoelectronics , chemistry , composite material , organic chemistry , chromatography , physics , quantum mechanics , engineering
This paper describes the production of conducting polypyrrole (PPy) thin films by plasma‐enhanced chemical vapor deposition (PECVD) and its posterior use for sensing applications of carbon dioxide (CO 2 ). Since PECVD yields the non‐conducting form of PPy, a doping process consisting of exposure to iodine vapor is required to obtain electrically conducting samples. Differences in the chemical state and topography between the doped and undoped systems are studied and characterized to demonstrate the doping effect on the polymer. Furthermore, changes in conductivity after exposure to CO 2 gas are measured to evaluate the use of these thin films as chemical sensors. The results suggest that plasma polymerized films show a good sensitivity and reproducibility in the analyte detection.