J. Phys. IV France 04 (1994) C9-131-C9-134
Sodium or cesium-assisted nitrogen monoxide reaction with InP(110) at ambient temperatureA. Glachant1, S.T. Kim2, 3 and P. Soukiassian2, 4
1 CRMC2-CNRS, Campus de Luminy, Case 913, 13288 Marseille cedex 9, France
2 CEA, SPAS, CEN de Saclay, Gif-sur-Yvette, France, and Department of Physics, Northern Illinois University, Dekalb, U.S.A.
3 Goldstar Central Research Laboratories, Seoul, South Korea
4 Commissariat à Energie Atomique, DSM-DRECAM-SRSIM, Bâtiment 462, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette cedex, France, and Département de Physique, Université de Paris-Sud, 91405 Orsay cedex, France
We investigate by means of core-level and valence-band photoemission spectroscopies with synchrotron radiation to what extent nitridation and oxidation of InP(110) can be promoted, at ambient temperature, using cesium or sodium alkali metal catalyst and pure nitrogen monoxide gas. We confirm that cesium has a better catalytic activity in InP oxidation than sodium. Compared to molecular oxygen, the weaker bond strength of the nitrogen monoxide molecule favors the oxidation of InP using sodium as electronic promoter. However, both alkali metals are inefficient to induce a detectable reaction between nitrogen and InP for NO exposures up to 1000 L (1 Langmuir (L)= 10-6 Torr.s).
© EDP Sciences 1994