The photoelectric property of the composite assembly of C-60 and CdS nanoparticles fabricated by LB technique was studied. The luminescence of US nanoparticles band-band exciton emission was extremely quenched resulted from the photocharge transfer from US nanoparticles to C-60 across a lipidic layer (about 2-3 nm). The fatty layer between C-60 and US nanoparticles played an important role in preventing photocharge recombination in their composite assemblies., (C) 2003 Elsevier Science B.V. All rights reserved.