Biphenylnitrile-Based Self-Assembled Monolayers on Au(111): Spectroscopic Characterization and Resonant Excitation of the Nitrile Tail Group
| Autor: | Peter Feulner, Andreas Terfort, Björn Schüpbach, Nirmalya Ballav, Stefan Neppl, Michael Zharnikov |
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| Rok vydání: | 2010 |
| Předmět: |
Auger electron spectroscopy
Range (particle radiation) Nitrile Chemistry Analytical chemistry Self-assembled monolayer 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Chemical physics Excited state Monolayer Physical and Theoretical Chemistry 0210 nano-technology Excitation |
| Zdroj: | The Journal of Physical Chemistry C. 114:12719-12727 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp1045386 |
| Popis: | A series of biphenylnitrile-based self-assembled monolayers (SAMs) on Au(111) was characterized by several complementary spectroscopic techniques, including resonant Auger electron spectroscopy (RAES). In spite of the disturbing role of nitrile, the SAMs exhibited high-quality and expected structural behavior, including the odd−even effects, even though with a lower extent than in the analogous nonsubstituted or methyl-substituted systems. A characteristic feature of the target films, and presumably also a general feature of oligophenyl-based SAMs, is a significant twist of the molecular backbone, similar to the situation in the analogous molecular crystals. No perceptible signal related to tail group-to-substrate transfer of the resonantly excited electron was recorded in the RAES spectra of the target films, even though such a transfer is energetically allowed in some of the cases. This was tentatively explained by the hypothesis that the charge transfer time is too long and lies beyond the range access... |
| Databáze: | OpenAIRE |
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