Dynamics of single Au nanoparticles on graphene simultaneously in real- and diffraction space by time-series convergent beam electron diffraction
arXiv:2503.01705 · doi:10.1016/j.micron.2025.103814
Abstract
Convergent beam electron diffraction (CBED) on two-dimensional materials allows simultaneous recording of the real-space image (tens of nanometers in size) and diffraction pattern of the same sample in one single-shot intensity measurement. In this study, we employ time-series CBED to visualize single Au nanoparticles deposited on graphene. The real-space image of the probed region, with the amount, size, and positions of single Au nanoparticles, is directly observed in the zero-order CBED disk, while the atomic arrangement of the Au nanoparticles is available from the intensity distributions in the higher-order CBED disks. From the time-series CBED patterns, the movement of a single Au nanoparticle with rotation up to 4° was recorded. We also observed facet diffraction lines - intense bright lines formed between the CBED disks of the Au nanoparticle, which we explain by diffraction at the Au nanoparticle's facets. This work showcases CBED as a useful technique for studying adsorbates on graphene using Au nanoparticles as a model platform, and paves the way for future studies of different objects deposited on graphene.
References in corpus (18)
- On the roughness of single- and bi-layer graphene membranes
- Practical algorithms for simulation and reconstruction of digital in-line holograms
- Graphene as a transparent conductive support for studying biological molecules by transmission electron microscopy
- Iterative phase retrieval for digital holography
- Imaging proteins at the truly single-molecule level
- Iterative phase retrieval in coherent diffractive imaging: practical issues
- Tempering of Au nanoclusters: capturing the temperature-dependent competition among structural motifs
- Holography and Coherent Diffraction with Low-Energy Electrons: A Route towards Structural Biology at the Single Molecule Level
- Convergent beam electron holography for analysis of van der Waals heterostructures
- Structural transformations in Cu, Ag, and Au metal nanoclusters
- Three-dimensional surface topography of graphene by divergent beam electron diffraction
- Convergent beam electron diffraction of multilayer van der Waals structures
- Convergent and divergent beam electron holography and reconstruction of adsorbates on free-standing two-dimensional crystals
- Single-shot X-ray ptychography as a structured illumination method
- Holographic reconstruction of the interlayer distance of bilayer two-dimensional crystal samples from their convergent beam electron diffraction patterns
- Imaging defects in two-dimensional crystals by convergent beam electron diffraction
- Mechanisms of radiation-induced structural transformations in deposited gold clusters
- Holographic convergent electron beam diffraction (CBED) imaging of two-dimensional crystals