LASER CHEMISTRY OF DIMETHYLCADMIUM AT SURFACES

A survey of our experimental activity in laser chemistry of adsorbed d imethylcadmium (DMCd) is presented. The dissociation, ionization, and desorption of DMCd and its fragments have been studied by laser desorp tion mass spectrometry. Both chemisorbed monolayer and physisorbed mul tilayer were considered. Si(100), fused quartz, crown glass, and stain less steel were used as substrates. A variety of pulsed lasers from IR CO2 (9.4 mu m) to UV KrCl (222 nm) were applied to induce the process es in adsorbed DMCd. The mechanisms based on resonant excitation of ad sorbate, photoexcitation or heating of substrates were realized. The s pecial features of adlayer photochemistry compared with gaseous phase one were found.