XPS, AES and EELS study of the bonding character in CNx films
We discuss the possibility of using photoemitted electrons corresponding to carbon 1s, in order to resolve the chemicalstate and the hybridization character of carbon in amorphous carbon nitride films (a-CNx). A series of carbon nitridefilms were prepared at room temperature by ablating a graphite t...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2002 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:94201509 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=94201509 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas XPS AES EELS Polymer Chemical state |
| Sumario: | We discuss the possibility of using photoemitted electrons corresponding to carbon 1s, in order to resolve the chemicalstate and the hybridization character of carbon in amorphous carbon nitride films (a-CNx). A series of carbon nitridefilms were prepared at room temperature by ablating a graphite target in a background of molecular nitrogen in thepressure range from high vacuum to 500 mTorr. The films were analyzed by means of XPS, EELS and AES. XPS resultsshow the existence of two predominant binding states for both, nitrogen and carbon. The effect of heat treatment is todecrease the nitrogen content in the films, and the sharpening of the binding configuration of carbon. EELS resultsindicate that the films have predominantly sp2-hybridized carbon, before and after heat treatment, and no evidence ofcarbon in the sp3 configuration was found. Thereupon, we conclude that it is not feasible to determine the hybridizationstate for carbon from XPS measurements alone, and that the nitrogen and carbon are co-existent in a polymer-like film |
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