Chemisorption of Acetophenone on Si(111)-7 × 7. Polar Aromatic Molecule on Electronically Complex Surface
| Autor: | Peter Matvija, P. Zimmermann, Pavel Kocán, Ondřej Krejčí, Pavel Sobotík, Ivan Ošt’ádal |
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| Rok vydání: | 2016 |
| Předmět: |
Annealing (metallurgy)
Scanning tunneling spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Crystallography General Energy chemistry Chemisorption Computational chemistry law 0103 physical sciences Molecule Polar Density functional theory Physical and Theoretical Chemistry Scanning tunneling microscope 010306 general physics 0210 nano-technology Acetophenone |
| Zdroj: | The Journal of Physical Chemistry C. 120:9200-9206 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b00486 |
| Popis: | Temperature-dependent chemisorption of acetophenone molecules on the Si(111)-7 × 7 reconstruction was studied by means of scanning tunneling microscopy, scanning tunneling spectroscopy, and density functional theory calculations. A configuration interpreted as a silyl enolether has been repeatedly observed on the surface at room temperature and after annealing to 75 °C. The most frequent structure on the surface stable up to 150 °C is identified as a 1,6-adduct to two adatoms of the neighboring half unit cells. The results suggest that presence of the polar group in the molecule affects the chemisorption in a way that leads to bonding with two adatoms. |
| Databáze: | OpenAIRE |
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