TY - JOUR
T1 - Characterization of mixed N2-layers on Ni(111) in the temperature range 20-100 K
AU - Breitschafter, M. J.
AU - Umbach, E.
AU - Menzel, D.
N1 - Funding Information:
We thank H. Schlichting for many valuable discussionsa nd technical assistance.T his work has been supported by the Deutsche Forschungs-gemeinschaf(tS FB 128).
PY - 1986/12/3
Y1 - 1986/12/3
N2 - The adsorption of molecular N2 on Ni(111) at very low temperatures ( ≥ 20 K) has been investigated with various techniques such as XPS, UPS, Δφ, and TPD. Four differently bound N2 states in the first three layers could be distinguished, and coexistence of a physisorbed and a weakly chemisorbed species in the first layer was observed. Coadsorption experiments were performed to titrate adsorption sites and to study the interactions and exchange reactions between the different N2 states, and between these and rare gases in mixed adsorption layers. Adsorption, desorption, and conversion kinetics were studied, and conclusions about the nature of the precursor states could be derived, which are also observed in situ with photoemission.
AB - The adsorption of molecular N2 on Ni(111) at very low temperatures ( ≥ 20 K) has been investigated with various techniques such as XPS, UPS, Δφ, and TPD. Four differently bound N2 states in the first three layers could be distinguished, and coexistence of a physisorbed and a weakly chemisorbed species in the first layer was observed. Coadsorption experiments were performed to titrate adsorption sites and to study the interactions and exchange reactions between the different N2 states, and between these and rare gases in mixed adsorption layers. Adsorption, desorption, and conversion kinetics were studied, and conclusions about the nature of the precursor states could be derived, which are also observed in situ with photoemission.
UR - http://www.scopus.com/inward/record.url?scp=0007960945&partnerID=8YFLogxK
U2 - 10.1016/0039-6028(86)90348-1
DO - 10.1016/0039-6028(86)90348-1
M3 - Article
AN - SCOPUS:0007960945
SN - 0039-6028
VL - 178
SP - 725
EP - 734
JO - Surface Science
JF - Surface Science
IS - 1-3
ER -