Deuterated methanol adsorption on Si(111)-(7 x 7) has been studied by C Is and O Is core-line synchrotron radiation photoemission and mass spectrometry of photodesorbed ions. Experiments were performed as a function of coverage and temperature. Two different C Is photoemission peaks hint at two different adsorbed species, the first one related to the methoxy fragment produced after dissociative adsorption, the second one is attributed to a CD, species. Both peaks disappear after heating at 350 degrees C, though the methoxy species is more reactive, and a third peak appears. The nature of the species producing the third peak was deduced by means of the mass spectra after heating the sample at 400 degrees C and attributed to C dispersed on the silicon surface.
Carbone, M., Piancastelli, M.n., Zanoni, R., Comtet, G., Dujardin, G., Hellner, L. (1997). Methanol adsorption on Si(111)-(7x7), investigated by core-line photoemission and mass spectrometry of photodesorbed ions. SURFACE SCIENCE, 370(1), L179-L184 [10.1016/S0039-6028(96)01175-2].
Methanol adsorption on Si(111)-(7x7), investigated by core-line photoemission and mass spectrometry of photodesorbed ions
CARBONE, MARILENA;PIANCASTELLI, MARIA NOVELLA;
1997-01-01
Abstract
Deuterated methanol adsorption on Si(111)-(7 x 7) has been studied by C Is and O Is core-line synchrotron radiation photoemission and mass spectrometry of photodesorbed ions. Experiments were performed as a function of coverage and temperature. Two different C Is photoemission peaks hint at two different adsorbed species, the first one related to the methoxy fragment produced after dissociative adsorption, the second one is attributed to a CD, species. Both peaks disappear after heating at 350 degrees C, though the methoxy species is more reactive, and a third peak appears. The nature of the species producing the third peak was deduced by means of the mass spectra after heating the sample at 400 degrees C and attributed to C dispersed on the silicon surface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
