Motion of Light Adatoms and Molecules on the Surface of Few-Layer Graphene
- 16 November 2011
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 5 (12), 9428-9441
- https://doi.org/10.1021/nn2036494
Abstract
Low-voltage aberration-corrected transmission electron microscopy (TEM) is applied to investigate the feasibility of continuous electron beam cleaning of graphene and monitor the removal of residual species as present on few-layer graphene (FLG) surfaces. This combined approach allows us to detect light adatoms and evaluate their discontinuous sporadic motional behavior. Furthermore, the formation and dynamic behavior of isolated molecules on the FLG surface can be captured. The preferential source of adatoms and adsorbed molecules appeared to be carbonaceous clusters accumulated from residual solvents on the graphene surface. TEM image simulations provide potential detail on the observed molecular structures. Molecular dynamics simulations confirm the experimentally observed dynamics occurring on the energy scale imposed by the presence of the 80 kV electron beam and help elucidate the underlying mechanismsKeywords
This publication has 40 references indexed in Scilit:
- In situ observations of fullerene fusion and ejection in carbon nanotubesNanoscale, 2010
- Single-wall-carbon-nanotube/single-carbon-chain molecular junctionsPhysical Review B, 2010
- Graphene at the Edge: Stability and DynamicsScience, 2009
- Dynamics of Paramagnetic Metallofullerenes in Carbon Nanotube PeapodsNano Letters, 2008
- Engineering of nanostructured carbon materials with electron or ion beamsNature Materials, 2007
- Imaging the Structure of an Individual C60 Fullerene Molecule and its Deformation Process Using HRTEM with Atomic SensitivityJournal of the American Chemical Society, 2007
- Synthetic Molecular Motors and Mechanical MachinesAngewandte Chemie-International Edition, 2006
- Molecular Motion of Endohedral Fullerenes in Single‐Walled Carbon NanotubesAngewandte Chemie-International Edition, 2004
- Single Flexible Hydrophobic Polyelectrolyte Molecules Adsorbed on Solid Substrate: Transition between a Stretched Chain, Necklace-like Conformation and a GlobuleJournal of the American Chemical Society, 2002
- Recording Intramolecular Mechanics during the Manipulation of a Large MoleculePhysical Review Letters, 2001