FABRICATION OF NANO-SIZED PARTICLES OF METALLIC COPPER AND COPPER SULFIDE IN LANGMUIR-BLODGETT-FILMS

Langmuir monolayers of arachidic acid on a subphase of 0.3 mM CuSO4/17 mM NH3 were transferred to hydrophobic glass and mica substrates to g ive Langmuir-Blodgett films of cupric arachidate (CuAr). Transfer rati os of close to 1 were observed and regular ''Y''-type deposition was d emonstrated with hydrophobic glass. With mica as the substrate, ''Z''- type deposition occurred. The films were exposed to H2S and hydrazine, and evidence for the formation of copper sulfide and metallic copper particles, respectively, was obtained by ultraviolet/visible spectroph otometry, X-ray photoelectron spectroscopy and atomic force microscopy . (C) 1998 Elsevier Science B.V.