Inversion model for extracting chemically resolved depth profiles across liquid interfaces of various configurations from XPS data: PROPHESY

PROPHESY, a technique for the reconstruction of surface-depth profiles from X-ray photoelectron spectroscopy data, is introduced. The inversion methodology is based on a Bayesian framework and primal-dual convex optimization. The acquisition model is developed for several geometries representing different sample types: plane (bulk sample), cylinder (liquid microjet) and sphere (droplet). The methodology is tested and characterized with respect to simulated data as a proof of concept. Possible limitations of the method due to uncertainty in the attenuation length of the photo-emitted electron are illustrated.

Source: Journal of Synchrotron Radiation - August 23, 2023 Category: Physics Authors: Ozon, M. Tumashevich, K. Lin, J.J. Prisle, N.L. Tags: X-ray photoelectron spectroscopy depth profile inversion algorithm atmospheric surfaces acquisition model research papers Source Type: research