Comparative Study of PF3, PH3 and P(CH)3 on Clean, K-Covered, and Cl-Covered Ag(111).

摘要

The adsorption and desorption of PF3, PH3 and P(CH3)3 on clean, Potassium (K)-covered, and Chlorine (Cl)-covered Ag(111) has been studied using temperature programmed desorption (TPD), work function change measurement, ultraviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS). All three compounds adsorb molecularly at 105 K, adsorb through their P atoms, and desorb reversibly with no detectable decomposition. The adsorptions are accompanied by a surface work function change. The desorption energies increase in the order PF3