Dr. Chris B. Boothroyd
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Germany Authors | C.B. Boothroyda, M.S. Morenob, M. Duchampa, A. Kovácsa, N. Mongec, G.M. Moralesc, C.A. Barberoc, R.E. Dunin-Borkowskia Email | firstname.lastname@example.org
|Application||Atomic Resolution Imaging and Spectroscopy of Barium Atoms and Functional Groups on Graphene Oxide|
|Authors||C.B. Boothroyda, M.S. Morenob, M. Duchampa, A. Kovácsa, N. Mongec, G.M. Moralesc, C.A. Barberoc, R.E. Dunin-Borkowskia|
|Journal||Ultramicroscopy Journal, 2014|
|Topic||Contamination Free, 2D Materials, Soft Matter, E-Beam Sensitive Imaging|
|Techniques||HRTEM, HRSTEM, EELS, Diffraction|
|Keywords||Graphene oxide; Functional groups; Scanning transmission electron microscopy; Transmission electron microscopy; Spectrum imaging; Atomic resolution; Single atom imaging|
|Publication / D.O.I.||Full Publication Here|
Atomic Resolution Imaging and Spectroscopy of Barium Atoms and Functional Groups on Graphene Oxide
Graphene, graphene-like two dimensional and other soft-mater materials attract increasing research efforts. Characterization of these type of materials in TEM, however, suffers contamination problems and e-beam damage.
Contamination, referring to the build-up of decomposed carbon on a specimen, heavily influences the quality of electron microscopy imaging. Graphene and graphene-like two dimensional materials suffer contamination the most because of two reasons 1. these materials are ultrathin, with low image contrast, the build up contamination contrast blur the original contrast easily; 2. these materials are with large surface area, easier to absorb hydrocarbon, water to form contamination under e-beam.
DENSsolutions heating system provides the opportunity to image these samples free of contamination at elevated temperature, without sacrificing the quality/resolution of imaging. The extreme high stability of DENSsolutions heating system (sample spatial drift less than 0.5nm/min) can even allow the researchers using a long exposure time (5s-8s) to image the individual carbon atoms for improving the contrast. Furthermore, the low drift allows chemical sensitive spectrum imaging to be carried down to atomic level.