Abstract
The effect of functionalisation of Multi-Walled CNTs (MWCNTs) as a way to ameliorate their dispersion has been quantified. Two kinds of nanocomposites have been elaborated, using a spin-coating as deposition technique: poly (2-methoxy-5-(2-ethyhexyl-oxy)-p-phenylenevinylene) (MEH-PPV) as an electron donor, pristine MWCNTs and polystyrene-functionalised MWCNTs (PS:MWCNTs) as electron acceptors. MEH-PPV/MWCNTs and MEH-PPV/PS:MWCNTs nanocomposites are characterised by photoluminescence spectroscopy and atomic force microscopy to study the charge transfer efficiency and morphological properties of these structures. An efficient charge transfer in MEH-PPV/MWCNTs and MEH-PPV/PS:MWCNT nanocomposites has taken place, but is broken when reaching a critical concentration of 0.5 and 1 wt.%, respectively. Once these critical concentrations are reached and supported by AFM images, aggregates of MWCNTs and PS:MWCNTs have been observed.