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Ultra-low energy SEM/STEM of graphene
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SYSNO ASEP 0501301 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Ultra-low energy SEM/STEM of graphene Author(s) Frank, Luděk (UPT-D) RID, SAI, ORCID
Mikmeková, Eliška (UPT-D) RIDNumber of authors 2 Source Title 19th World Congress on Material Science and Engineering. Proceedings, S7. - London : Omics International, 2018 - ISSN 2169-0022
S. 141-142Number of pages 2 s. Publication form Print - P Action World Congress on Materials Science and Engineering /19./ Event date 11.06.2018 - 13.06.2018 VEvent location Barcelona Country ES - Spain Event type WRD Language eng - English Country GB - United Kingdom Keywords ultra-low energy ; SEM ; STEM ; graphene Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Nano-materials (production and properties) Institutional support UPT-D - RVO:68081731 DOI 10.4172/2169-0022-C8-113 Annotation Graphene sheets, including multilevel stacks, are nearly fully transparent for electrons at energies standard in electron microscopes. Graphene has even been considered an ideal substrate for the deposition of, for example, organic macromolecules for their observation in a scanning (transmission) electron microscope (SEM/STEM). The cathode lens principle with a negatively biased sample in the SEM/STEM enables one to obtain an arbitrarily low energy of electrons securing an ultimately reduced interaction volume providing the image information. The image contrast has been found to be sufficient for distinguishing graphene flakes at tens and units of eV in the STEM, and the electron transmissivity surprisingly showed values in units of percent only in this energy range. Expectations based on the usual extension of the inelastic mean free path of electrons below some 50 eV have not been confirmed. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2019
Number of the records: 1