Ethylene Chemisorption on Levitated Silicon Cluster Ions: Evidence for Annealing
RICE UNIV HOUSTON TX DEPT OF CHEMISTRY
Pagination or Media Count:
Mass-selected silicon clusters were levitated in a Fourier transform ion cyclotron resonance mass spectrometer FT-ICR, and monitored during chemisorption reaction with ethylene. The reactivity of the six positively charged clusters studied here varied sharply as a function of cluster size, indicating that ethylene is as sensitive a probe of the cluster surface chemistry as reported previously for ammonia. As with ammonia, the 39th and the 45th clusters were found to be particularly unreactive towards ethylene chemisorption. The results suggest that most silicon clusters in this moderately large size range are able to anneal to an energetically most favored crystalline form. Keywords Silicon clusters, Ethylene chemisorption, Reprints.
- Physical Chemistry