Simple fabrication of carbon nanotube monolayer film

We report a simple fabrication method for creating a monolayer film of multiwalled carbon nanotubes (MWCNTs). The MWCNTs, which were synthesized using alumina template method, was dispersed in aqueous ethanol solution. Then toluene was added to the dispersion. After sonicating the solution, the MWCNTs form a monolayer at the liquid-liquid interface. The monolayer was transferred onto a solid substrate using simple dipping method. An AFM image showed the formation of a densely packed MWCNT monolayer film.