While XRR is a powerful technique, it does have some limitations:
Material Constraints: It is most effective for materials with significant electron density contrast. Sample Preparation: The sample surface must be smooth and clean to obtain accurate measurements. Model Dependence: The accuracy of the results is highly dependent on the initial model and fitting process. Depth Sensitivity: XRR is primarily sensitive to the surface and near-surface regions, making it less effective for bulk material analysis.
