Dynamics of the activated dissociative chemisorption of N2 on W(110): A molecular beam study

Download statistics - Document (COUNTER):

Pfnür, H.; Rettner, C.T.; Lee, J.; Madix, R.J.; Auerbach, D.J.: Dynamics of the activated dissociative chemisorption of N2 on W(110): A molecular beam study. In: Journal of Chemical Physics 85 (1986), 7452. DOI: https://doi.org/10.1063/1.451334

Repository version

To cite the version in the repository, please use this identifier: https://doi.org/10.15488/2770

Selected time period:

year: 
month: 

Sum total of downloads: 93




Thumbnail
Abstract: 
Molecular beam techniques have been used to study the dissociative chemisorption of nitrogen on W(110). Chemisorption probabilities have been measured as a function of incidence angle θi and kinetic energy Ei surface coverage and temperature. In addition, angular scattering distributions have been measured for a range of conditions and LEED has been used to examine surface structure. The initial (zero coverage limit) sticking probability is found to depend strongly on the incidence energy, scaling approximately with Ei, rather than with the velocity component normal to the surface. This probability is ≤3×10−3 for Ei≤30 kJ mol−1, and rises by more than a factor of 100 by ∼100 kJ mol−1, where it levels off at ∼0.35. It is argued that this behavior arises due to a strong chemical interaction prior to the barrier to dissociation. Angular scattering distributions revealed predominately quasispecular scattering with evidence as well for a diffuse component at low energies. The sticking probability falls steadily with increasing surface coverage and a saturation coverage of ∼0.25 atomic ML is observed for Ei∼10 kJ mol−1. At higher incidence kinetic energies, this saturation coverage increases to ∼0.5 ML at 200 kJ mol−1. LEED structures are also reported, corresponding to coverages of 0.25, 0.3, 0.5, and 0.52 ML. The 0.25 and 0.5 ML structures are identified as p(2×2) and c(4×2), respectively, for which structure models are proposed.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: article
Publishing status: publishedVersion
Issue Date: 1986
Appears in Collections:Fakultät für Mathematik und Physik

distribution of downloads over the selected time period:

downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 35 37.63%
2 image of flag of Greece Greece 20 21.51%
3 image of flag of United States United States 18 19.35%
4 image of flag of China China 5 5.38%
5 image of flag of Japan Japan 3 3.23%
6 image of flag of No geo information available No geo information available 2 2.15%
7 image of flag of Russian Federation Russian Federation 2 2.15%
8 image of flag of India India 2 2.15%
9 image of flag of France France 2 2.15%
10 image of flag of Korea, Republic of Korea, Republic of 1 1.08%
    other countries 3 3.23%

Further download figures and rankings:


Hinweis

Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.

Search the repository


Browse