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First Principles Study of the Adsorption Structure of Ethylene on Ge(001) Surface
- Source :
- The Journal of Physical Chemistry C. 114:2200-2207
- Publication Year :
- 2010
- Publisher :
- American Chemical Society (ACS), 2010.
-
Abstract
- The adsorption of ethylene on the Ge(001) surface is investigated by the first principles density-functional calculations. Our total energy calculations and reaction path investigations clarify the relative importance of various adsorption configurations at 0.5 and 1.0 monolayer adsorption coverage. The results are consistent with the experimental data in the literature in that both the di-σ and paired-end-bridge configurations are the favorable structures on Ge(001). In addition, our calculation results clarify that having di-σ-bound ethylene and end-bridge-bound ethylene next to each other is unfavorable. Such new results imply that although di-σ-bound ethylene and end-bridge-bound ethylene may coexist on Ge(001), phase separation will occur to form adsorbate domains. The electronic structures have also been studied, and the band structure calculations show that both the di-σ and end-bridge models at 0.5 monolayer are semiconducting with a small band gap of ∼0.4 eV, which is slightly larger than the ban...
- Subjects :
- Surface (mathematics)
Materials science
Ethylene
Band gap
Structure (category theory)
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
General Energy
Adsorption
chemistry
Chemical physics
Computational chemistry
Monolayer
Reaction path
Physical and Theoretical Chemistry
Electronic band structure
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 114
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........69f7145c6e4789a5d0b18ded4398797c