Author/Authors :
Curran، نويسنده , , S. and Davey، نويسنده , , A.P. and Coleman، نويسنده , , J. and Dalton، نويسنده , , A. and McCarthy، نويسنده , , Greer B. and Maier، نويسنده , , S. W. Drury، نويسنده , , A. and Gray، نويسنده , , D. and Brennan، نويسنده , , M. and Ryder، نويسنده , , K. and de la Chapelle، نويسنده , , M. Lamy and Journet، نويسنده , , C. and Bernier، نويسنده , , P. and Byrne، نويسنده , , H.J. and Carroll، نويسنده , , D. and Ajayan، نويسنده , , P.M. ، نويسنده ,
Abstract :
Composite structures, using MWNT and SWNT and the polymer (PmPV) exhibit properties which enhance those of the individual components. The polymer PmPV can act as an organic filter for the multiwalled system where the MWNT are indefinitely suspended in the polymer solution while the carbonaceous material falls out of solution. Raman measurements of this show a complete reduction of the amorphous line at 1350 cm-1. We see that we can alter the luminescence quantum yield of the composite, where the effects are different depending on which nanotubes are used. When we examine the SWNT/PmPV the quantum yield is increased. The MWNT composite also shows strong non-linear optical signal. The pristine polymer has an χ(3) of 10−11 esu whereas the composite χ(3) is -10−10 esu.
Keywords :
Carbon nanotubes , Luminescence and Roman spectroscopy , Nonlinear optics , poly(phenylene vinylene) and derivatives
