Ym. Sun et al., ELECTRON-INDUCED ADSORPTION, DESORPTION AND DECOMPOSITION OF AMMONIA ON GAAS(100), Surface science, 295(1-2), 1993, pp. 120000982-120000986
The desorption and dissociation of ammonia adsorbed on (GaAs(100) occu
rs readily upon activation with 50 eV electrons. Complementary results
from temperature programmed desorption and X-ray photoelectron spectr
oscopy indicate that the cross-sections for parent desorption and for
dissociation to NH(x) (x = 1, 2) are similar (10(-16)-10(-17) cm 2), w
hereas that for nitride production is two orders of magnitude smaller.
All these are more than an order of magnitude higher than observed in
analogous photon-driven reactions.