Quantification of crystalline and amorphous content in porous samples from electron energy loss spectroscopy
| Autor: | Giovanni Bertoni, G. Van Tendeloo, E. Beyers, Etienne F. Vansant, Jo Verbeeck, Pegie Cool, Myrjam Mertens |
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| Rok vydání: | 2006 |
| Předmět: |
Diffraction
Materials science Electron energy loss spectroscopy Analytical chemistry Electron spectroscopy Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Amorphous solid Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science Phase (matter) X-ray crystallography Mesoporous material Spectroscopy Instrumentation |
| Zdroj: | Ultramicroscopy. 106:630-635 |
| ISSN: | 0304-3991 |
| DOI: | 10.1016/j.ultramic.2006.03.006 |
| Popis: | We present an efficient method for the quantification of crystalline versus amorphous phase content in mesoporous materials, making use of electron energy loss spectroscopy. The method is based on fitting a superposition of core-loss edges using the maximum likelihood method with measured reference spectra. We apply the method to mesoporous TiO2 samples. We show that the absolute amount of the crystalline phase can be determined with an accuracy below 5%. This method takes also the amorphous phase into account, where standard X-ray diffraction is only quantitative for crystalline phases and not for amorphous phase. |
| Databáze: | OpenAIRE |
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