Referencing to adventitious carbon in X-ray photoelectron spectroscopy: Can differential charging explain C 1s peak shifts?
Linköping University · Thinfilm (Sweden)
Abstract
C 1s peak of adventitious carbon (AdC), often used for charge referencing XPS spectra, shows markedly large shifts from the “recommended” value of 284.8 eV that basically disqualifies its reliability. In some earlier papers we attributed this spreading effect to the vacuum level (VL) alignment at the AdC/sample interface, which makes the measured position of C 1s peak EBF highly sensitive to the sample work function ϕSA. Recently, it was suggested [M.C. Biesinger, Appl. Surf. Sci. 597 (2022) 153681] that it is instead the differential charging in the native oxide layers that sometimes accounts for C 1s shifts and that electrically isolating samples from the spectrometer would solve the problem. To evaluate…
Citation impact
- FWCI
- 21.15
- Percentile
- 100%
- References
- 20
Authors
2Topics & keywords
- X-ray photoelectron spectroscopy
- Analytical Chemistry (journal)
- Spectrometer
- Spectral line
- Work function
- Chemistry
- Atomic physics
- Range (aeronautics)