X-ray photoelectron spectroscopy of nickel dithiolene complex Langmuir–Blodgett films

The chemical states, composition, and structures of monolayer and multilayer Langmuir–Blodgett LB.films of a nickel dithiolene BDN.complex and stearyl alcohol SA., and BDN powder were characterized using X-ray photoelectron spectroscopy XPS.. The results indicate that Ni atoms mainly exist as Ni2q in the LB films, while those exist in both Ni2q and Ni0 states in pure BDN powder. S–O and Ni–O bonds are more apparent in the XPS spectra of the LB films sample. The study of the peak features of S2p and Ni2p3r2 with various thickness on silicon with little silicon oxide surface. substrate indicates that chemisorption occurs in BDN molecules on a Si substrate. The electrical conductivity of BDN bulk and LB films and its relationship with the chemical state were also discussed. q1999 Elsevier Science B.V. All rights reserved.