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Fernandez, V., Fairley, N. & Baltrusaitis, J. (2021) Unraveling spectral shapes of adventitious carbon on gold using a time-resolved high-resolution X-ray photoelectron spectroscopy and principal component analysis. Applied Surface Science, 538 148031. 
Added by: Richard Baschera (2021-01-11 08:45:33)   Last edited by: Richard Baschera (2021-01-11 08:51:09)
Type de référence: Article
DOI: 10.1016/j.apsusc.2020.148031
Numéro d'identification (ISBN etc.): 01694332
Clé BibTeX: Fernandez2021
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Créateurs: Baltrusaitis, Fairley, Fernandez
Collection: Applied Surface Science
Consultations : 4/326
Indice de consultation : 7%
Indice de popularité : 1.75%
Liens URLs     https://linkinghub ... /S0169433220327884
To extract chemical information reliably, we propose a new data processing method based both on the creation of information vectors and on a vector base change. The originality of this method is the combination of the different core XPS peaks, Auger and/or valence bands in a single vector. We show that the measurement of a sample upon its progressive chemical change, such as accumulation of the adventitious carbon, allows us to create a new vector basis using linear algebra and Principal Component Analysis. We demonstrate the application of this method using adventitious carbon films on Au foil utilizing Au 4f, C 1s and O 1s spectral envelopes. This method expands the possibilities of XPS measured chemical environment analysis and is an operator -unbiased solution for materials for which the reference XPS spectra are not available. In this demonstration, the emphasis is placed on identifying changes in a C 1s peak assumed to be adventitious carbon and highlight uncertainties associated with calibrating the binding energy scale using a simple peak model to identify a component C 1s assumed to be saturated hydrocarbon in origin.
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