Substrate-Selective Morphology of Cesium Iodide Clusters on Graphene
Open Access
- 28 April 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 14 (4), 4626-4635
- https://doi.org/10.1021/acsnano.9b10053
Abstract
Formation and characterization of low-dimensional nanostructures is crucial for controlling the properties of two-dimensional (2D) materials such as graphene. Here, we study the structure of low-dimensional adsorbates of cesium iodide (CsI) on freestanding graphene using aberration-corrected transmission electron microscopy at atomic resolution. CsI is deposited onto graphene as charged clusters by electrospray ion-beam deposition. The interaction with the electron beam forms two-dimensional CsI crystals only on bilayer graphene, while CsI clusters consisting of 4, 6, 7, and 8 ions are exclusively observed on single-layer graphene. Chemical characterization by electron energy-loss spectroscopy imaging and precise structural measurements evidence the possible influence of charge transfer on the structure formation of the CsI clusters and layers, leading to different distances of the Cs and I to the graphene.Funding Information
- Horizon 2020 Framework Programme (823717-ESTEEM3)
This publication has 44 references indexed in Scilit:
- Chemical Reactions of Molecules Promoted and Simultaneously Imaged by the Electron Beam in Transmission Electron MicroscopyAccounts of Chemical Research, 2017
- Stop-Frame Filming and Discovery of Reactions at the Single-Molecule Level by Transmission Electron MicroscopyACS Nano, 2017
- Electron beam controlled covalent attachment of small organic molecules to grapheneNanoscale, 2016
- Chemical Modification of Graphene via Hyperthermal Molecular ReactionJournal of the American Chemical Society, 2014
- Dynamic Motion of Ru-Polyoxometalate Ions (POMs) on Functionalized Few-Layer GrapheneSmall, 2013
- Accurate Measurement of Electron Beam Induced Displacement Cross Sections for Single-Layer GraphenePhysical Review Letters, 2012
- Direct Experimental Evidence of Metal-Mediated Etching of Suspended GrapheneACS Nano, 2012
- Motion of Light Adatoms and Molecules on the Surface of Few-Layer GrapheneACS Nano, 2011
- Transmission electron microscopy at 20kV for imaging and spectroscopyUltramicroscopy, 2011
- Sub-ångstrom resolution using aberration corrected electron opticsNature, 2002