Electron Transfer Initiated Formation of Covalently Bound Organic Layers on Silicon Surfaces
| Autor: | Abdelaziz Houmam, M'hamed Chahma, Dan F. Thomas, Emad M. Hamed, Kallum M. Koczkur |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Silicon
chemistry.chemical_element Photochemistry Acceptor Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electron transfer chemistry.chemical_compound General Energy X-ray photoelectron spectroscopy Ferrocene chemistry Nucleophilic substitution Moiety Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | The Journal of Physical Chemistry C. 118:20908-20915 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp505166a |
| Popis: | An electron transfer initiated organic modification of silicon surfaces, using a donor/acceptor pair of ferrocene (Fc) and N-bromosuccinimide (NBS) (or N-bromophthalimide (NBP)), is reported for the first time. This modification method is efficient and does not require the use of heat or irradiation. Multilayer structures are formed on the surfaces through radical reactions, similar to the reduction of aryl diazonium salts. The modified surfaces were characterized by infrared reflection–absorption spectroscopy (IRRAS), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). IRRAS spectra clearly indicate a strong carbonyl stretch and the presence of a ferrocene moiety for each of the modified surfaces. XPS data show the presence of all elements from the donor/acceptor pair and provide strong evidence that the samples can be further modified by nucleophilic substitution. AFM imaging indicates the formation of dense layers that can be scratched away to reveal depth information on approxim... |
| Databáze: | OpenAIRE |
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