Preparation, characterization and NH_3-sensing of 1,8,15,22-tetra-iso-pentyloxyphthalocyanine copper, nickel and lead spin-coating films

摘要

Spin-coating films of copper, lead and nickel 1,8,15,22-tetra-iso-pentyloxyphthalocyanine (Cu, Pb and NiPc(iso-PeO)_4) were obtained and characterized by absorption spectra and atomic force microscopy. The gas sensing behaviors of the films were investigated with respect to NH_3 at room temperature. In addition, the effects of film morphology and center metal on gas sensing properties were also discussed. It was found that the MPc(iso-PeO)_4 films exhibited good response, reversibility, stability and faster response and recovery characteristic to NH_3. The responses were in the following order: CuPc(iso-PeO)_4, PbPc(iso-PeO)_4 and NiPc(iso-PeO)_4, and the response and recovery were in the following order: CuPc(iso-PeO)_4, NiPc(iso-PeO)_4 and PbPc(iso-PeO)_4.