Mechanisms of laser interaction with metal carbonyls adsorbed on Si(111)7×7: Thermal vs photoelectronic effects

摘要: Ultrahigh vacuum studies of the interaction 514 nm radiation from a cw Ar ion laser and its second harmonic at 257 with mono‐ multilayer coverages Mo(CO)6, W(CO)6, Fe(CO)5 adsorbed on Si(111)7×7 90 K using thermal desorption spectroscopy (TDS), induced spectroscopy, high resolution electron energy loss (HREELS), Auger were performed. A model for temperature rise sample due to heating is developed. By directly measuring substrate temperature, these experiments able distinguish between photoelectronic effects active in decomposition mechanisms carbonyls. Results TDS HREELS show that Mo(CO)6 W(CO)6 are molecularly adsorbed, while partially dissociates upon adsorption. The caused by electronic excitation direct absorption radiation. Irradiation results no...