Very Low Energy STEM and Imaging of Free-standing Foils

0379917 - ÚPT 2012 RIV AU eng C - Conference Paper (international conference)
Hovorka, Miloš - Müllerová, Ilona - Frank, Luděk
Very Low Energy STEM and Imaging of Free-standing Foils.
Coneference Proceedings APMC-10, ICONN 2012 and ACMM-22. Wembley: EECW Pty Ltd, 2012, 411:1-2. ISBN 978-1-74052-245-8.
[Asia-Pacific Microscopy Conference (APMC-10) - International Conference on Nanoscience and Nanotechnology (ICONN 2012) - Australian Conference on Microscopy and Microanalysis (ACMM-22). Perth (AU), 05.02.2012-09.02.2012]
R&D Projects: GA MPO FR-TI3/323
Institutional support: RVO:68081731
Keywords : scanning low energy electron microscopy * cathode lens * transmitted electrons
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

We extended the imaging capability of an ultra-high vacuum (UHV) scanning low energy electron microscope (SLEEM) to the transmission mode at very low electron energies. The simultaneous incorporation of a cathode lens (CL) and a detector of transmitted electrons (TE) allows to study ultrathin free-standing foils by transmitted electrons in the energy range between keV and units of eV. Experiments were performed on amorphous carbon and scandium foils a few nm thick and on graphene-like flakes. A high contrast was obtained that depended on the thickness and the structure of the foil.
Permanent Link: http://hdl.handle.net/11104/0210768