Employing surface curvature for spatially resolved X‐ray reflectivity: graphene domains on liquid copper - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advanced Materials Interfaces Année : 2023

Employing surface curvature for spatially resolved X‐ray reflectivity: graphene domains on liquid copper

Résumé

Here the possibility of utilizing X-ray reflectivity for visualization with ≈µm spatial resolution of a surface with a heterogeneous electron density due to a partial coverage by another nanometrically thin material is demonstrated. It requires the sample to be convexly bent, thus reflecting the collimated incident beam onto a magnified image recorded by a position-sensitive detector. By the use of a small, intense, and parallel beam such as provided by the most recent synchrotron sources, one can record such spatially resolved X-ray reflectivity with 0.1–1 kHz frame rate. The use of the method for in situ, time-resolved characterization of single-layer graphene domains during their chemical vapor deposition on a naturally curved surface of a liquid copper drop is demonstrated. This method can follow the growth kinetics, including the coverage ratio, 2D crystal (flake) sizes, and distances between flakes. By taking a single scan, the individual X-ray reflectivity curves can be reconstructed, of both covered and noncovered parts of the surface, allowing to deduce the corresponding electron density profiles perpendicular to the surface. The technique has a promising perspective for in situ study of 2D materials, ultrathin films, and self-assemblies on liquid as well as solid surfaces.
Fichier principal
Vignette du fichier
Adv Materials Inter - 2023 - Belova - Employing Surface Curvature for Spatially Resolved X‐Ray Reflectivity Graphene.pdf (1.4 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité

Dates et versions

hal-04076985 , version 1 (21-04-2023)

Identifiants

Citer

Valentina Belova, Maciej Jankowski, Mehdi Saedi, Irene M. N. Groot, Gilles Renaud, et al.. Employing surface curvature for spatially resolved X‐ray reflectivity: graphene domains on liquid copper. Advanced Materials Interfaces, 2023, 2023, pp.2300053. ⟨10.1002/admi.202300053⟩. ⟨hal-04076985⟩
14 Consultations
19 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More