Excellent ambipolar gas sensing response of Eu[Pc(OC4H9)8]2/acidified multiwalled carbon nanotubes hybrid at room temperature

A new hybrid material has been developed by mixing a sandwich-type double-decker, Eu[Pc(OC 4 H 9 ) 8 ] 2 = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninate] with acidified multiwalled carbon nanotubes (aMWCNTs) through non-covalent interactions. The UV-vis spectrum, X-ray diffraction and scanning electron microscope have been employed to reveal the J -aggregate mode and optimized morphology of Eu[Pc(OC 4 H 9 ) 8 ] 2 molecules in the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid material. The gas-sensing devices based on this hybrid material are fabricated by a simple solvent-processing quasi-Langmuir–Shäfer (QLS) progress. The n -type and p -type response is shown by the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid film at room temperature. The detection limit of the hybrid for ammonia and nitrogen dioxide gas is 0.5 ppm and 0.3 ppm, respectively.