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Sensing of Vaporous Organic Compounds by TiO 2 Porous Films Covered with Polythiophene Layers
Author(s) -
Kimura Mutsumi,
Sakai Ryousuke,
Sato Seiko,
Fukawa Tadashi,
Ikehara Tsuyoshi,
Maeda Ryutaro,
Mihara Takashi
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201101953
Subject(s) - polythiophene , materials science , monomer , chemiresistor , porosity , chemical engineering , adsorption , amphiphile , polymerization , polymer , nanoparticle , nanotechnology , organic chemistry , conductive polymer , composite material , copolymer , chemistry , engineering
This paper describes the detection of volatile organic compounds (VOCs) through analyses of two output signals from integrated microcantilever sensor arrays coated with organic‐inorganic hybrid sensing layers. The surface of TiO 2 porous films was modified by amphiphilic terthiophene monomers and the adsorbed monomers were polymerized at the surface of TiO 2 nanoparticles. The TiO 2 porous films covered with polythiophene layers worked as highly sensitive sensing interfaces to provide two output signals for weight and resistance changes during exposure to VOC vapor. When the TiO 2 porous films onto the sensor arrays were dyed with various kinds of amphiphilic monomers with different substituents, the resulting films provide exact information on VOC concentration from the mass changes as well as VOC classification from the analyses of response patterns.