Fullerene (C 60 ) nanoparticles were assembled in two-dimension using a liquid-liquid interface. C 60 nanoparticles dispersed in ethyl lactate=water solution were added to a glass vessel. Then, hexane was added to the dispersion solution to create the liquidliquid interface. C 60 nanocrystals were assembled at the interface, when ethanol was added to the water dispersion-hexane solution. The assembled film was transferred onto a solid substrate and the film morphology was observed by a scanning electron microscope (SEM) and atomic force microscope (AFM).

Non-chemically treated single-walled carbon nanotubes (SWCNTs) were assembled at a liquid-liquid interface in the shape of an ultrathin film. SWCNTs were dispersed into water phase by aid of sodium dodecyl sulfate (SDS) and were assembled at a hexane-water interface with addition of ethanol. The assembled film was transferred onto a solid substrate at various dipping speeds. Polarized absorption spectra of the transferred film indicated that the SWCNTs aligned with their long axis parallel to the dipping direction when the assembly was transferred at the dipping speed of 50 mm=min.