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.
Methanol adsorption on Si(111)-(7x7), investigated by core-line photoemission and mass spectrometry of photodesorbed ions / M., Carbone; M. N., Piancastelli; Zanoni, Robertino; G., Comtet; G., Dujardin; L., Hellner. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 370:(1997), pp. 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
ZANONI, Robertino;
1997
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.
